http: allow specifying Go DNS resolver on config backends

cmd: have -check use same logger as fatal errors
cmd: log errors with ERROR severity via slog, additionally print newline string, fixes #12
2025-04-27 13:16:42 +02:00 · 2025-04-27 12:18:49 +02:00 · 2025-04-27 12:17:18 +02:00 · 2025-04-27 11:51:17 +02:00 · 2025-04-26 00:03:43 +02:00 · 2025-04-25 23:56:29 +02:00
40 changed files with 1296 additions and 978 deletions
--- a/.drone.jsonnet
+++ b/.drone.jsonnet
@@ -140,11 +140,11 @@ local mirror = "https://mirror.gcr.io";

    # latest
    Publish(mirror, "git.gammaspectra.live", "git.gammaspectra.live/git/go-away", "git", goVersion, alpineVersion, "linux", "amd64", {event: ["push"], branch: ["master"], }, containerArchitectures, {tags: ["latest"],}) + {name: "publish-latest-git"},
-    Publish(mirror, "codeberg.org", "codeberg.org/weebdatahoarder/go-away", "codeberg", goVersion, alpineVersion, "linux", "amd64", {event: ["push"], branch: ["master"], }, containerArchitectures, {tags: ["latest"],}) + {name: "publish-latest-codeberg"},
+    Publish(mirror, "codeberg.org", "codeberg.org/gone/go-away", "codeberg", goVersion, alpineVersion, "linux", "amd64", {event: ["push"], branch: ["master"], }, containerArchitectures, {tags: ["latest"],}) + {name: "publish-latest-codeberg"},
    Publish(mirror, "ghcr.io", "ghcr.io/weebdatahoarder/go-away", "github", goVersion, alpineVersion, "linux", "amd64", {event: ["push"], branch: ["master"], }, containerArchitectures, {tags: ["latest"],}) + {name: "publish-latest-github"},

    # modern
    Publish(mirror, "git.gammaspectra.live", "git.gammaspectra.live/git/go-away", "git", goVersion, alpineVersion, "linux", "amd64", {event: ["promote", "tag"], target: ["production"], }, containerArchitectures, {auto_tag: true,}),
-    Publish(mirror, "codeberg.org", "codeberg.org/weebdatahoarder/go-away", "codeberg", goVersion, alpineVersion, "linux", "amd64", {event: ["promote", "tag"], target: ["production"], }, containerArchitectures, {auto_tag: true,}),
+    Publish(mirror, "codeberg.org", "codeberg.org/gone/go-away", "codeberg", goVersion, alpineVersion, "linux", "amd64", {event: ["promote", "tag"], target: ["production"], }, containerArchitectures, {auto_tag: true,}),
    Publish(mirror, "ghcr.io", "ghcr.io/weebdatahoarder/go-away", "github", goVersion, alpineVersion, "linux", "amd64", {event: ["promote", "tag"], target: ["production"], }, containerArchitectures, {auto_tag: true,}),
 ]
--- a/.drone.yml
+++ b/.drone.yml
@@ -203,7 +203,7 @@ steps:
    - linux/arm64
    - linux/riscv64
    registry: codeberg.org
-    repo: codeberg.org/weebdatahoarder/go-away
+    repo: codeberg.org/gone/go-away
    tags:
    - latest
    username:
@@ -348,7 +348,7 @@ steps:
    - linux/arm64
    - linux/riscv64
    registry: codeberg.org
-    repo: codeberg.org/weebdatahoarder/go-away
+    repo: codeberg.org/gone/go-away
    username:
      from_secret: codeberg_username
 trigger:
@@ -408,6 +408,6 @@ trigger:
 type: docker
 ---
 kind: signature
-hmac: ad13c88b81cd1c6ebd4bb8d33479ffe8e67bc8caefdcc1c06dd1a6b75476bcd7
+hmac: 7d15ec708707d96b5741471555875d0001b84da74a7688baf0bae6fea0dbf138

 ...
--- a/14
+++ b/14
@@ -32,14 +32,19 @@ RUN test -e "${GOBIN}/go-away"
 FROM --platform=$TARGETPLATFORM ${from}

 COPY --from=build /go/bin/go-away /bin/go-away
+COPY examples/snippets/ /snippets/

 ENV TZ UTC

+ENV GOAWAY_METRICS_BIND=""
+ENV GOAWAY_DEBUG_BIND=""
+
 ENV GOAWAY_BIND=":8080"
 ENV GOAWAY_BIND_NETWORK="tcp"
 ENV GOAWAY_SOCKET_MODE="0770"
+ENV GOAWAY_CONFIG=""
 ENV GOAWAY_POLICY="/policy.yml"
-ENV GOAWAY_POLICY_SNIPPETS="/policy/snippets"
+ENV GOAWAY_POLICY_SNIPPETS=""
 ENV GOAWAY_CHALLENGE_TEMPLATE="anubis"
 ENV GOAWAY_CHALLENGE_TEMPLATE_THEME=""
 ENV GOAWAY_SLOG_LEVEL="WARN"
@@ -50,13 +55,18 @@ ENV GOAWAY_BACKEND=""
 ENV GOAWAY_ACME_AUTOCERT=""
 ENV GOAWAY_CACHE="/cache"

+
 EXPOSE 8080/tcp
 EXPOSE 8080/udp
+EXPOSE 9090/tcp
+EXPOSE 6060/tcp

 ENV JWT_PRIVATE_KEY_SEED="${GOAWAY_JWT_PRIVATE_KEY_SEED}"

 ENTRYPOINT  /bin/go-away --bind "${GOAWAY_BIND}" --bind-network "${GOAWAY_BIND_NETWORK}" --socket-mode "${GOAWAY_SOCKET_MODE}" \
-            --policy "${GOAWAY_POLICY}" --policy-snippets "${GOAWAY_POLICY_SNIPPETS}" \
+            --metrics-bind "${GOAWAY_METRICS_BIND}" --debug-bind "${GOAWAY_DEBUG_BIND}" \
+            --config "${GOAWAY_CONFIG}" \
+            --policy "${GOAWAY_POLICY}" --policy-snippets "/snippets" --policy-snippets "${GOAWAY_POLICY_SNIPPETS}" \
            --client-ip-header "${GOAWAY_CLIENT_IP_HEADER}" --backend-ip-header "${GOAWAY_BACKEND_IP_HEADER}" \
            --cache "${GOAWAY_CACHE}" \
            --challenge-template "${GOAWAY_CHALLENGE_TEMPLATE}" --challenge-template-theme "${GOAWAY_CHALLENGE_TEMPLATE_THEME}" \
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ Source code is automatically pushed to the following mirrors. Packages are also

 [![GammaSpectra.live](https://img.shields.io/badge/GammaSpectra.live-main+packages-green?style=flat&logo=data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiIHN0YW5kYWxvbmU9Im5vIj8+CjxzdmcgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxuczp4bGluaz0iaHR0cDovL3d3dy53My5vcmcvMTk5OS94bGluayIgd2lkdGg9IjYwMCIgaGVpZ2h0PSI2MDAiIHZpZXdCb3g9Ii0zMDAgLTMwMCA2MDAgNjAwIj4KPGNpcmNsZSByPSI1MCIvPgo8cGF0aCBkPSJNNzUsMCBBIDc1LDc1IDAgMCwwIDM3LjUsLTY0Ljk1MiBMIDEyNSwtMjE2LjUwNiBBIDI1MCwyNTAgMCAwLDEgMjUwLDAgeiIgaWQ9ImJsZCIvPgo8dXNlIHhsaW5rOmhyZWY9IiNibGQiIHRyYW5zZm9ybT0icm90YXRlKDEyMCkiLz4KPHVzZSB4bGluazpocmVmPSIjYmxkIiB0cmFuc2Zvcm09InJvdGF0ZSgyNDApIi8+Cjwvc3ZnPg==&labelColor=fff)](https://git.gammaspectra.live/git/go-away) ![](https://git.gammaspectra.live/git/go-away/badges/stars.svg?style=flat) [![](https://git.gammaspectra.live/git/go-away/badges/issues/open.svg?style=flat)](https://git.gammaspectra.live/git/go-away/issues?state=open) [![](https://git.gammaspectra.live/git/go-away/badges/pulls/open.svg?style=flat)](https://git.gammaspectra.live/git/go-away/pulls?state=open)

-[![Codeberg](https://img.shields.io/badge/Codeberg-mirror+packages-2185D0?style=flat&logo=codeberg&labelColor=fff)](https://codeberg.org/WeebDataHoarder/go-away) ![](https://codeberg.org/WeebDataHoarder/go-away/badges/stars.svg?style=flat)
+[![Codeberg](https://img.shields.io/badge/Codeberg-mirror+packages-2185D0?style=flat&logo=codeberg&labelColor=fff)](https://codeberg.org/gone/go-away) ![](https://codeberg.org/gone/go-away/badges/stars.svg?style=flat)

 [![GitHub](https://img.shields.io/badge/GitHub-mirror+packages-blue?style=flat&logo=github&labelColor=fff&logoColor=24292f)](https://github.com/WeebDataHoarder/go-away) ![](https://img.shields.io/github/stars/WeebDataHoarder/go-away?style=flat)

@@ -80,6 +80,8 @@ These templates are included by default:

 External templates for your site can be loaded specifying a full path to the `.gohtml` file. See [embed/templates/](embed/templates/) for examples to follow.

+You can alter the language and strings in the templates directly from the [config.yml](#config) file if specified.
+
 ### Extended rule actions

 In addition to the common PASS / CHALLENGE / DENY rules, go-away offers more actions that can be extended via code.
@@ -294,17 +296,18 @@ However, a few points are left before go-away can be called v1.0.0:
 * [x] Several parts of the code are going through a refactor, which won't impact end users or operators.
 * [ ] Documentation is lacking and a more extensive one with inline example is in the works.
 * [x] Policy file syntax is going to stay mostly unchanged, except in the challenges definition section.
-* [ ] Allow users to pick fallback challenges if any fail, specially with custom ones.
+* [ ] Allow end users to pick fallback challenges if any fail, specially with custom ones.
 * [ ] Replace Anubis-like default template with own one.
-* [ ] Define strings and multi-language support for quick modification by operators without custom templates.
+* [x] Define strings and multi-language support for quick modification by operators without custom templates.
 * [ ] Have highly tested paths that match examples.
 * [x] Caching of temporary fetches, for example, network ranges.
 * [x] Allow live and dynamic policy reloading.
 * [x] Multiple domains / subdomains -> one backend handling, CEL rules for backends
 * [ ] Merge all rules and conditions into one large AST for higher performance.
 * [ ] Explore exposing a module for direct Caddy usage.
-* [ ] More defined way of picking HTTP/HTTP(s) listeners and certificates.
-* [ ] Expose metrics for gathering common network ranges, challenge solve rates and acting on them.
+* [x] More defined way of picking HTTP/HTTP(s) listeners and certificates.
+* [x] Expose metrics for challenge solve rates and acting on them.
+  * [ ] Metrics for common network ranges / AS / useragent

 ## Setup

@@ -312,6 +315,10 @@ go-away can take plaintext HTTP/1 and _HTTP/2_ / _h2c_ connections if desired ov

 We also support the `autocert` parameter to configure HTTP(s). This will also allow TLS Fingerprinting to be done on incoming clients. This doesn't require any upstream proxies, and we recommend it's exposed directly or via SNI / Layer 4 proxying.

+### Config
+
+While most basic configuration can be passed via the command line, we support passing a [config.yml](examples/config.yml) with more advanced setup, including string replacement or custom backends configuration.
+
 ### Binary / Go

 Requires Go 1.24+. Builds statically without CGo usage.
@@ -341,7 +348,7 @@ Available under [Dockerfile](Dockerfile). See the _docker compose_ below for the

 Example follows a hypothetical Forgejo server running on `http://forgejo:3000` serving `git.example.com`

-Container images are published under `git.gammaspectra.live/git/go-away`, `codeberg.org/weebdatahoarder/go-away` and `ghcr.io/weebdatahoarder/go-away`
+Container images are published under `git.gammaspectra.live/git/go-away`, `codeberg.org/gone/go-away` and `ghcr.io/weebdatahoarder/go-away`

 ```yaml
 networks:
@@ -353,7 +360,7 @@ volumes:
    
 services:
  go-away:
-    # image: codeberg.org/weebdatahoarder/go-away:latest
+    # image: codeberg.org/gone/go-away:latest
    # image: ghcr.io/weebdatahoarder/go-away:latest
    image: git.gammaspectra.live/git/go-away:latest
    restart: always
@@ -366,12 +373,17 @@ services:
    volumes:
      - "goaway_cache:/cache"
      - "./examples/forgejo.yml:/policy.yml:ro"
-      - "./examples/snippets/:/policy/snippets/:ro"
+      #- "./your/snippets/:/policy/snippets/:ro"
    environment:
      #GOAWAY_BIND: ":8080"
      # Supported tcp, unix, and proxy (for enabling PROXY module for request unwrapping)
      #GOAWAY_BIND_NETWORK: "tcp"
      #GOAWAY_SOCKET_MODE: "0770"
+
+      # Enable Prometheus metrics under /metrics on this bind
+      #GOAWAY_METRICS_BIND: ":9090"
+      # Enable Go debug profiles under this bind
+      #GOAWAY_DEBUG_BIND: ":6060"
      
      # set to letsencrypt or other directory URL to enable HTTPS. Above ports will be TLS only.
      # enables request JA3N / JA4 client TLS fingerprinting
@@ -400,9 +412,15 @@ services:
      # If left empty, the header on GOAWAY_CLIENT_IP_HEADER will be left as-is
      #GOAWAY_BACKEND_IP_HEADER: ""
      
+      # Alternate way of specifying parameters or more advanced settings
+      # Pass path to YAML file
+      #GOAWAY_CONFIG: ""
+      
      GOAWAY_POLICY: "/policy.yml"

-      GOAWAY_POLICY_SNIPPETS: "/policy/snippets"
+      # Include extra snippets to load from this path.
+      # Note that the default snippets from example/snippets/ are included by default
+      #GOAWAY_POLICY_SNIPPETS: "/policy/snippets"
      
      # Template, and theme for the template to pick. defaults to an anubis-like one
      # An file path can be specified. See embed/templates for a few examples
@@ -424,11 +442,13 @@ services:

 ## Other Similar Projects

-|                         Project                         |                                                                                                                          Forge                                                                                                                          | Description                                                                                                     |
-|:-------------------------------------------------------:|:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:----------------------------------------------------------------------------------------------------------------|
-|          [Anubis](https://anubis.techaro.lol/)          |        [![GitHub](https://img.shields.io/badge/GitHub-TecharoHQ/anubis-blue?style=flat&logo=github&labelColor=fff&logoColor=24292f)](https://github.com/TecharoHQ/anubis)<br/>Go / [MIT](https://github.com/TecharoHQ/anubis/blob/main/LICENSE)         | Proxy that uses JavaScript proof of work to weight request based on simple match rules                          |
-|         [powxy](https://sr.ht/~runxiyu/powxy/)          | [![sourcehut](https://img.shields.io/badge/sourcehut-~runxiyu/powxy-blue?style=flat&logo=sourcehut&labelColor=fff&logoColor=000)](https://git.sr.ht/~runxiyu/powxy)<br/> Go / [BSD 2-Clause](https://git.sr.ht/~runxiyu/powxy/tree/master/item/LICENSE) | Powxy is a reverse proxy that protects your upstream service by challenging clients with SHA-256 proof-of-work. |
-| [anticrawl](https://flak.tedunangst.com/post/anticrawl) |                                                                                          [[source]](https://humungus.tedunangst.com/r/anticrawl)<br/>Go / None                                                                                          | Go http handler / proxy for regex based rules                                                                   |
+|                                    Project                                    |                                                                                                                                                      Source Code                                                                                                                                                      | Description                                                                                             | Method                                       |
+|:-----------------------------------------------------------------------------:|:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:--------------------------------------------------------------------------------------------------------|:---------------------------------------------|
+|                     [Anubis](https://anubis.techaro.lol/)                     |                                       [![GitHub](https://img.shields.io/badge/GitHub-TecharoHQ/anubis-blue?style=flat&logo=github&labelColor=fff&logoColor=24292f)](https://github.com/TecharoHQ/anubis)<br/>Go / [MIT](https://github.com/TecharoHQ/anubis/blob/main/LICENSE)                                        | Proxy that uses JavaScript proof of work to weight request based on simple match rules                  | JavaScript PoW (SHA-256)                     |
+|       [powxy](https://forge.lindenii.runxiyu.org/powxy/-/repos/powxy/)        |                  [![lindenii.runxiyu.org](https://img.shields.io/badge/lindenii-powxy-blue?style=flat&logo=git&labelColor=fff&logoColor=000)](https://forge.lindenii.runxiyu.org/powxy/-/repos/powxy/)<br/> Go / [BSD 2-Clause](https://forge.lindenii.runxiyu.org/powxy/-/repos/powxy/tree/LICENSE)                  | Powxy is a reverse proxy that protects your upstream service by challenging clients with proof-of-work. | JavaScript PoW (SHA-256) with manual program |
+| [PoW! Bot Deterrent](https://git.sequentialread.com/forest/pow-bot-deterrent) | [![SequentialRead](https://img.shields.io/badge/SequentialRead-forest/pow--bot--deterrent-blue?style=flat&logo=gitea&labelColor=fff&logoColor=000)](https://git.sequentialread.com/forest/pow-bot-deterrent)<br/> Go / [GPL v3.0](https://git.sequentialread.com/forest/pow-bot-deterrent/src/branch/main/LICENSE.md) | A proof-of-work based bot deterrent. Lightweight, self-hosted and copyleft licensed.                    | JavaScript PoW (WASM scrypt)                 |
+|                  [CSSWAF](https://github.com/yzqzss/csswaf)                   |                                            [![GitHub](https://img.shields.io/badge/GitHub-yzqzss/csswaf-blue?style=flat&logo=github&labelColor=fff&logoColor=24292f)](https://github.com/yzqzss/csswaf)<br/>Go / [MIT](https://github.com/yzqzss/csswaf/blob/main/LICENSE)                                            | A CSS-based NoJS Anti-BOT WAF (Proof of Concept)                                                        | Non-JS CSS Subresource loading order         |
+|            [anticrawl](https://flak.tedunangst.com/post/anticrawl)            |                                                        [![humungus.tedunangst.com](https://img.shields.io/badge/tedunangst-anticrawl-blue?style=flat&logo=mercurial&labelColor=fff&logoColor=000)](https://humungus.tedunangst.com/r/anticrawl)<br/>Go / None                                                         | Go http handler / proxy for regex based rules                                                           | Non-JS manual Challenge/Response             |


 ## Development
--- a/cmd/go-away/main.go
+++ b/cmd/go-away/main.go
@@ -4,78 +4,27 @@ import (
 	"bytes"
 	"crypto/ed25519"
 	"crypto/rand"
-	"crypto/tls"
 	"encoding/hex"
 	"errors"
 	"flag"
 	"fmt"
 	"git.gammaspectra.live/git/go-away/lib"
 	"git.gammaspectra.live/git/go-away/lib/policy"
+	"git.gammaspectra.live/git/go-away/lib/settings"
 	"git.gammaspectra.live/git/go-away/utils"
-	"github.com/pires/go-proxyproto"
-	"golang.org/x/crypto/acme"
-	"golang.org/x/crypto/acme/autocert"
-	"log"
+	"github.com/goccy/go-yaml"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"log/slog"
-	"net"
 	"net/http"
+	"net/http/pprof"
 	"os"
 	"os/signal"
 	"path"
 	"runtime/debug"
-	"strconv"
 	"strings"
-	"sync/atomic"
 	"syscall"
 )

-func setupListener(network, address, socketMode string, proxy bool) (net.Listener, string) {
-	if network == "proxy" {
-		network = "tcp"
-		proxy = true
-	}
-
-	formattedAddress := ""
-	switch network {
-	case "unix":
-		formattedAddress = "unix:" + address
-	case "tcp":
-		formattedAddress = "http://localhost" + address
-	default:
-		formattedAddress = fmt.Sprintf(`(%s) %s`, network, address)
-	}
-
-	listener, err := net.Listen(network, address)
-	if err != nil {
-		log.Fatal(fmt.Errorf("failed to bind to %s: %w", formattedAddress, err))
-	}
-
-	// additional permission handling for unix sockets
-	if network == "unix" {
-		mode, err := strconv.ParseUint(socketMode, 8, 0)
-		if err != nil {
-			listener.Close()
-			log.Fatal(fmt.Errorf("could not parse socket mode %s: %w", socketMode, err))
-		}
-
-		err = os.Chmod(address, os.FileMode(mode))
-		if err != nil {
-			listener.Close()
-			log.Fatal(fmt.Errorf("could not change socket mode: %w", err))
-		}
-	}
-
-	if proxy {
-		slog.Warn("listener PROXY enabled")
-		formattedAddress += " +PROXY"
-		listener = &proxyproto.Listener{
-			Listener: listener,
-		}
-	}
-
-	return listener, formattedAddress
-}
-
 var internalCmdName = "go-away"
 var internalMainName = "go-away"
 var internalMainVersion = "dev"
@@ -101,40 +50,29 @@ func (v *MultiVar) Set(value string) error {
 	return nil
 }

-func newACMEManager(clientDirectory string, backends map[string]http.Handler) *autocert.Manager {
-
-	var domains []string
-	for d := range backends {
-		parts := strings.Split(d, ":")
-		d = parts[0]
-		if net.ParseIP(d) != nil {
-			continue
-		}
-		domains = append(domains, d)
-	}
-
-	manager := &autocert.Manager{
-		Prompt:     autocert.AcceptTOS,
-		HostPolicy: autocert.HostWhitelist(domains...),
-		Client: &acme.Client{
-			HTTPClient:   http.DefaultClient,
-			DirectoryURL: clientDirectory,
-		},
-	}
-	return manager
+func fatal(err error) {
+	slog.Error(err.Error())
+	_, _ = fmt.Fprintln(os.Stderr, "================================================")
+	_, _ = fmt.Fprintln(os.Stderr, "Fatal error:")
+	_, _ = fmt.Fprintln(os.Stderr, err.Error())
+	os.Exit(1)
 }

 func main() {
-	bind := flag.String("bind", ":8080", "network address to bind HTTP/HTTP(s) to")
-	bindNetwork := flag.String("bind-network", "tcp", "network family to bind HTTP to, e.g. unix, tcp")
-	bindProxy := flag.Bool("bind-proxy", false, "use PROXY protocol in front of the listener")
-	socketMode := flag.String("socket-mode", "0770", "socket mode (permissions) for unix domain sockets.")
+
+	opt := settings.DefaultSettings
+
+	flag.StringVar(&opt.Bind.Address, "bind", opt.Bind.Address, "network address to bind HTTP/HTTP(s) to")
+	flag.StringVar(&opt.Bind.Network, "bind-network", opt.Bind.Network, "network family to bind HTTP to, e.g. unix, tcp")
+	flag.BoolVar(&opt.Bind.Proxy, "bind-proxy", opt.Bind.Proxy, "use PROXY protocol in front of the listener")
+	flag.StringVar(&opt.Bind.SocketMode, "socket-mode", opt.Bind.SocketMode, "socket mode (permissions) for unix domain sockets.")
+	flag.StringVar(&opt.BindMetrics, "metrics-bind", opt.BindMetrics, "network address to bind metrics on")
+	flag.StringVar(&opt.BindDebug, "debug-bind", opt.BindDebug, "network address to bind debug on")

 	slogLevel := flag.String("slog-level", "WARN", "logging level (see https://pkg.go.dev/log/slog#hdr-Levels)")
-	debugMode := flag.Bool("debug", false, "debug mode with logs and server timings")
-	passThrough := flag.Bool("passthrough", false, "passthrough mode sends all requests to matching backends until state is loaded")
+	flag.BoolVar(&opt.Bind.Passthrough, "passthrough", opt.Bind.Passthrough, "passthrough mode sends all requests to matching backends until state is loaded")
 	check := flag.Bool("check", false, "check configuration and policies, then exit")
-	acmeAutocert := flag.String("acme-autocert", "", "enables HTTP(s) mode and uses the provided ACME server URL or available service (available: letsencrypt)")
+	flag.StringVar(&opt.Bind.TLSAcmeAutoCert, "acme-autocert", opt.Bind.TLSAcmeAutoCert, "enables HTTP(s) mode and uses the provided ACME server URL or available service (available: letsencrypt)")

 	clientIpHeader := flag.String("client-ip-header", "", "Client HTTP header to fetch their IP address from (X-Real-Ip, X-Client-Ip, X-Forwarded-For, Cf-Connecting-Ip, etc.)")
 	backendIpHeader := flag.String("backend-ip-header", "", "Backend HTTP header to set the client IP address from, if empty defaults to leaving Client header alone (X-Real-Ip, X-Client-Ip, X-Forwarded-For, Cf-Connecting-Ip, etc.)")
@@ -142,19 +80,28 @@ func main() {
 	cachePath := flag.String("cache", path.Join(os.TempDir(), "go_away_cache"), "path to temporary cache directory")

 	policyFile := flag.String("policy", "", "path to policy YAML file")
-	policySnippets := flag.String("policy-snippets", "", "path to YAML snippets folder")
-	challengeTemplate := flag.String("challenge-template", "anubis", "name or path of the challenge template to use (anubis, forgejo)")
-	challengeTemplateTheme := flag.String("challenge-template-theme", "", "name of the challenge template theme to use (forgejo => [forgejo-auto, forgejo-dark, forgejo-light, gitea...])")
+	var policySnippets MultiVar
+	flag.Var(&policySnippets, "policy-snippets", "path to YAML snippets folder (can be specified multiple times)")

-	packageName := flag.String("package-path", internalCmdName, "package name to expose in .well-known url path")
+	flag.StringVar(&opt.ChallengeTemplate, "challenge-template", opt.ChallengeTemplate, "name or path of the challenge template to use (anubis, forgejo)")
+
+	templateTheme := flag.String("challenge-template-theme", opt.ChallengeTemplateOverrides["Theme"], "name of the challenge template theme to use (forgejo => [forgejo-auto, forgejo-dark, forgejo-light, gitea...])")
+
+	basePath := flag.String("path", "/.well-known/."+internalCmdName, "base path where to expose go-away package onto, challenges will be served from here")

 	jwtPrivateKeySeed := flag.String("jwt-private-key-seed", "", "Seed for the jwt private key, or on JWT_PRIVATE_KEY_SEED env. One be generated by passing \"generate\" as a value, follows RFC 8032 private key definition. Defaults to random")

 	var backends MultiVar
 	flag.Var(&backends, "backend", "backend definition in the form of an.example.com=http://backend:1234 (can be specified multiple times)")

+	settingsFile := flag.String("config", "", "path to config override YAML file")
+
 	flag.Parse()

+	if *backendIpHeader == "" {
+		*backendIpHeader = *clientIpHeader
+	}
+
 	var err error

 	{
@@ -168,14 +115,39 @@ func main() {
 		leveler.Set(programLevel)

 		h := slog.NewJSONHandler(os.Stderr, &slog.HandlerOptions{
-			AddSource: *debugMode,
+			AddSource: programLevel <= slog.LevelDebug,
 			Level:     leveler,
+			ReplaceAttr: func(groups []string, a slog.Attr) slog.Attr {
+				if a.Key == "source" {
+					if src, ok := a.Value.Any().(*slog.Source); ok {
+						return slog.String(a.Key, fmt.Sprintf("%s:%d", src.File, src.Line))
+					}
+				}
+				return a
+			},
 		})
 		slog.SetDefault(slog.New(h))
+		// set default log logger to slog logger level
+		slog.SetLogLoggerLevel(programLevel)
 	}

 	slog.Info("go-away", "package", internalMainName, "version", internalMainVersion, "cmd", internalCmdName)

+	// preload missing settings
+	opt.ChallengeTemplateOverrides["Theme"] = *templateTheme
+
+	// load overrides
+	if *settingsFile != "" {
+		settingsData, err := os.ReadFile(*settingsFile)
+		if err != nil {
+			fatal(fmt.Errorf("could not read settings file: %w", err))
+		}
+		err = yaml.Unmarshal(settingsData, &opt)
+		if err != nil {
+			fatal(fmt.Errorf("could not parse settings file: %w", err))
+		}
+	}
+
 	var seed []byte

 	var kValue string
@@ -189,7 +161,7 @@ func main() {
 		if strings.ToLower(kValue) == "generate" {
 			_, priv, err := ed25519.GenerateKey(rand.Reader)
 			if err != nil {
-				log.Fatal(fmt.Errorf("failed to generate private key: %w", err))
+				fatal(fmt.Errorf("failed to generate private key: %w", err))
 			}
 			fmt.Printf("%x\n", priv.Seed())
 			os.Exit(0)
@@ -197,30 +169,42 @@ func main() {

 		seed, err = hex.DecodeString(kValue)
 		if err != nil {
-			log.Fatal(fmt.Errorf("failed to decode seed: %w", err))
+			fatal(fmt.Errorf("failed to decode seed: %w", err))
 		}

 		if len(seed) != ed25519.SeedSize {
-			log.Fatal(fmt.Errorf("invalid seed length: %d, expected %d", len(seed), ed25519.SeedSize))
+			fatal(fmt.Errorf("invalid seed length: %d, expected %d", len(seed), ed25519.SeedSize))
 		}

 	}

 	createdBackends := make(map[string]http.Handler)
-
-	parsedBackends := make(map[string]string)
 	for _, backend := range backends {
+		if backend == "" {
+			// skip empty to allow no values
+			continue
+		}
 		parts := strings.Split(backend, "=")
 		if len(parts) != 2 {
-			log.Fatal(fmt.Errorf("invalid backend definition: %s, expected 2 parts, got %v", backend, parts))
+			fatal(fmt.Errorf("invalid backend definition: %s, expected 2 parts, got %v", backend, parts))
+		}
+
+		// make no-settings, default backend
+		opt.Backends[parts[0]] = settings.Backend{
+			URL:      parts[1],
+			IpHeader: *backendIpHeader,
 		}
-		parsedBackends[parts[0]] = parts[1]
 	}

-	for k, v := range parsedBackends {
-		backend, err := utils.MakeReverseProxy(v)
+	for k, v := range opt.Backends {
+		if v.IpHeader == "" {
+			//set default value
+			v.IpHeader = *backendIpHeader
+		}
+
+		backend, err := v.Create()
 		if err != nil {
-			log.Fatal(fmt.Errorf("backend %s: failed to make reverse proxy: %w", k, err))
+			fatal(fmt.Errorf("backend %s: failed to make reverse proxy: %w", k, err))
 		}

 		backend.ErrorLog = slog.NewLogLogger(slog.With("backend", k).Handler(), slog.LevelError)
@@ -228,49 +212,29 @@ func main() {
 	}

 	if len(createdBackends) == 0 {
-		log.Fatal(fmt.Errorf("no backends defined in policy file"))
+		fatal(fmt.Errorf("no backends defined in cmdline or settings file"))
 	}

 	var cache utils.Cache
+	var acmeCache string
 	if *cachePath != "" {
 		err = os.MkdirAll(*cachePath, 0755)
 		if err != nil {
-			log.Fatal(fmt.Errorf("failed to create cache directory: %w", err))
+			fatal(fmt.Errorf("failed to create cache directory: %w", err))
 		}
 		for _, n := range []string{"networks", "acme"} {
 			err = os.MkdirAll(path.Join(*cachePath, n), 0755)
 			if err != nil {
-				log.Fatal(fmt.Errorf("failed to create cache sub directory %s: %w", n, err))
+				fatal(fmt.Errorf("failed to create cache sub directory %s: %w", n, err))
 			}
 		}

 		cache, err = utils.CacheDirectory(*cachePath)
 		if err != nil {
-			log.Fatal(fmt.Errorf("failed to open cache directory: %w", err))
-		}
-	}
-
-	var tlsConfig *tls.Config
-
-	if *acmeAutocert != "" {
-		switch *acmeAutocert {
-		case "letsencrypt":
-			*acmeAutocert = acme.LetsEncryptURL
+			fatal(fmt.Errorf("failed to open cache directory: %w", err))
 		}

-		acmeManager := newACMEManager(*acmeAutocert, createdBackends)
-		if *cachePath != "" {
-			err = os.MkdirAll(path.Join(*cachePath, "acme"), 0755)
-			if err != nil {
-				log.Fatal(fmt.Errorf("failed to create acme cache directory: %w", err))
-			}
-			acmeManager.Cache = autocert.DirCache(path.Join(*cachePath, "acme"))
-		}
-		slog.Warn(
-			"acme-autocert enabled",
-			"directory", *acmeAutocert,
-		)
-		tlsConfig = acmeManager.TLSConfig()
+		acmeCache = path.Join(*cachePath, "acme")
 	}

 	loadPolicyState := func() (http.Handler, error) {
@@ -279,27 +243,24 @@ func main() {
 			return nil, fmt.Errorf("failed to read policy file: %w", err)
 		}

-		p, err := policy.NewPolicy(bytes.NewReader(policyData), *policySnippets)
+		p, err := policy.NewPolicy(bytes.NewReader(policyData), policySnippets...)
 		if err != nil {
 			return nil, fmt.Errorf("failed to parse policy file: %w", err)
 		}

-		settings := policy.Settings{
-			Cache:                  cache,
-			Backends:               createdBackends,
-			Debug:                  *debugMode,
-			MainName:               internalMainName,
-			MainVersion:            internalMainVersion,
-			PackageName:            *packageName,
-			ChallengeTemplate:      *challengeTemplate,
-			ChallengeTemplateTheme: *challengeTemplateTheme,
-			PrivateKeySeed:         seed,
-			ClientIpHeader:         *clientIpHeader,
-			BackendIpHeader:        *backendIpHeader,
-			ChallengeResponseCode:  http.StatusTeapot,
+		stateSettings := policy.StateSettings{
+			Cache:                 cache,
+			Backends:              createdBackends,
+			MainName:              internalMainName,
+			MainVersion:           internalMainVersion,
+			BasePath:              *basePath,
+			PrivateKeySeed:        seed,
+			ClientIpHeader:        *clientIpHeader,
+			BackendIpHeader:       *backendIpHeader,
+			ChallengeResponseCode: http.StatusTeapot,
 		}

-		state, err := lib.NewState(*p, settings)
+		state, err := lib.NewState(*p, opt, stateSettings)

 		if err != nil {
 			return nil, fmt.Errorf("failed to create state: %w", err)
@@ -310,48 +271,30 @@ func main() {
 	if *check {
 		_, err := loadPolicyState()
 		if err != nil {
-			slog.Error(err.Error())
-			os.Exit(1)
+			fatal(err)
 		}
 		slog.Info("load ok")
 		os.Exit(0)
 	}

-	listener, listenUrl := setupListener(*bindNetwork, *bind, *socketMode, *bindProxy)
+	listener, listenUrl := opt.Bind.Listener()
 	slog.Warn(
 		"listening",
 		"url", listenUrl,
 	)

-	var serverHandler atomic.Pointer[http.Handler]
-	server := utils.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if handler := serverHandler.Load(); handler == nil {
-			http.Error(w, http.StatusText(http.StatusBadGateway), http.StatusBadGateway)
-		} else {
-			(*handler).ServeHTTP(w, r)
-		}
-	}), tlsConfig)
-
-	if *passThrough {
-		// setup a passthrough handler temporarily
-		fn := http.Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			backend := utils.SelectHTTPHandler(createdBackends, r.Host)
-			if backend == nil {
-				http.Error(w, http.StatusText(http.StatusBadGateway), http.StatusBadGateway)
-			} else {
-				backend.ServeHTTP(w, r)
-			}
-		}))
-		serverHandler.Store(&fn)
+	server, swap, err := opt.Bind.Server(createdBackends, acmeCache)
+	if err != nil {
+		fatal(fmt.Errorf("failed to create server: %w", err))
 	}

 	go func() {
 		handler, err := loadPolicyState()
 		if err != nil {
-			log.Fatal(fmt.Errorf("failed to load policy state: %w", err))
+			fatal(fmt.Errorf("failed to load policy state: %w", err))
 		}

-		serverHandler.Store(&handler)
+		swap(handler)
 		slog.Warn(
 			"handler configuration loaded",
 		)
@@ -369,18 +312,59 @@ func main() {
 				continue
 			}

-			serverHandler.Store(&handler)
+			swap(handler)
 			slog.Warn("handler configuration reloaded")
 		}
 	}()

-	if tlsConfig != nil {
+	if opt.BindDebug != "" {
+		go func() {
+			mux := http.NewServeMux()
+			mux.HandleFunc("/debug/pprof/", pprof.Index)
+			mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
+			mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
+			mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
+			debugServer := http.Server{
+				Addr:    opt.BindDebug,
+				Handler: mux,
+			}
+
+			slog.Warn(
+				"listening debug",
+				"bind", opt.BindDebug,
+			)
+			if err = debugServer.ListenAndServe(); !errors.Is(err, http.ErrServerClosed) {
+				fatal(err)
+			}
+		}()
+	}
+
+	if opt.BindMetrics != "" {
+		go func() {
+			mux := http.NewServeMux()
+			mux.Handle("/metrics", promhttp.Handler())
+			metricsServer := http.Server{
+				Addr:    opt.BindMetrics,
+				Handler: mux,
+			}
+
+			slog.Warn(
+				"listening metrics",
+				"bind", opt.BindMetrics,
+			)
+			if err = metricsServer.ListenAndServe(); !errors.Is(err, http.ErrServerClosed) {
+				fatal(err)
+			}
+		}()
+	}
+
+	if server.TLSConfig != nil {
 		if err := server.ServeTLS(listener, "", ""); !errors.Is(err, http.ErrServerClosed) {
-			log.Fatal(err)
+			fatal(err)
 		}
 	} else {
 		if err := server.Serve(listener); !errors.Is(err, http.ErrServerClosed) {
-			log.Fatal(err)
+			fatal(err)
 		}
 	}

--- a/embed/assets/static/anubis/style.css
+++ b/embed/assets/static/anubis/style.css
@@ -103,3 +103,17 @@ footer {
        padding: 0.5em 10px;
    }
 }
+
+body,
+html {
+    height: 100%;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    margin-left: auto;
+    margin-right: auto;
+}
+
+.centered-div {
+    text-align: center;
+}
--- a/embed/templates/challenge-anubis.gohtml
+++ b/embed/templates/challenge-anubis.gohtml
@@ -4,6 +4,7 @@
    <title>{{ .Title }}</title>
    <link rel="stylesheet" href="{{ .Path }}/assets/static/anubis/style.css?cacheBust={{ .Random }}"/>
    <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
+    <meta name="referrer" content="origin"/>
    {{ range $key, $value := .Meta }}
        {{ if eq $key "refresh"}}
        <meta http-equiv="{{ $key }}" content="{{ $value }}"/>
@@ -14,132 +15,6 @@
    {{ range .HeaderTags }}
        {{ . }}
    {{ end }}
-    <style>
-        body,
-        html {
-            height: 100%;
-            display: flex;
-            justify-content: center;
-            align-items: center;
-            margin-left: auto;
-            margin-right: auto;
-        }
-
-        .centered-div {
-            text-align: center;
-        }
-
-        .lds-roller,
-        .lds-roller div,
-        .lds-roller div:after {
-            box-sizing: border-box;
-        }
-
-        .lds-roller {
-            display: inline-block;
-            position: relative;
-            width: 80px;
-            height: 80px;
-        }
-
-        .lds-roller div {
-            animation: lds-roller 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
-            transform-origin: 40px 40px;
-        }
-
-        .lds-roller div:after {
-            content: " ";
-            display: block;
-            position: absolute;
-            width: 7.2px;
-            height: 7.2px;
-            border-radius: 50%;
-            background: currentColor;
-            margin: -3.6px 0 0 -3.6px;
-        }
-
-        .lds-roller div:nth-child(1) {
-            animation-delay: -0.036s;
-        }
-
-        .lds-roller div:nth-child(1):after {
-            top: 62.62742px;
-            left: 62.62742px;
-        }
-
-        .lds-roller div:nth-child(2) {
-            animation-delay: -0.072s;
-        }
-
-        .lds-roller div:nth-child(2):after {
-            top: 67.71281px;
-            left: 56px;
-        }
-
-        .lds-roller div:nth-child(3) {
-            animation-delay: -0.108s;
-        }
-
-        .lds-roller div:nth-child(3):after {
-            top: 70.90963px;
-            left: 48.28221px;
-        }
-
-        .lds-roller div:nth-child(4) {
-            animation-delay: -0.144s;
-        }
-
-        .lds-roller div:nth-child(4):after {
-            top: 72px;
-            left: 40px;
-        }
-
-        .lds-roller div:nth-child(5) {
-            animation-delay: -0.18s;
-        }
-
-        .lds-roller div:nth-child(5):after {
-            top: 70.90963px;
-            left: 31.71779px;
-        }
-
-        .lds-roller div:nth-child(6) {
-            animation-delay: -0.216s;
-        }
-
-        .lds-roller div:nth-child(6):after {
-            top: 67.71281px;
-            left: 24px;
-        }
-
-        .lds-roller div:nth-child(7) {
-            animation-delay: -0.252s;
-        }
-
-        .lds-roller div:nth-child(7):after {
-            top: 62.62742px;
-            left: 17.37258px;
-        }
-
-        .lds-roller div:nth-child(8) {
-            animation-delay: -0.288s;
-        }
-
-        .lds-roller div:nth-child(8):after {
-            top: 56px;
-            left: 12.28719px;
-        }
-
-        @keyframes lds-roller {
-            0% {
-                transform: rotate(0deg);
-            }
-
-            100% {
-                transform: rotate(360deg);
-            }
-        }
-    </style>
 </head>
 <body id="top">
 <main>
@@ -154,43 +29,29 @@
                src="{{ .Path }}/assets/static/logo.png?cacheBust={{ .Random }}"
        />
        {{if .Challenge }}
-        <p id="status">Loading challenge <em>{{ .Challenge }}</em>...</p>
+        <p id="status">{{ .Strings.Get "status_loading_challenge" }} <em>{{ .Challenge }}</em>...</p>
        {{else if .Error}}
-        <p id="status">Error: {{ .Error }}</p>
+        <p id="status">{{ .Strings.Get "status_error" }} {{ .Error }}</p>
        {{else}}
-        <p id="status">Loading...</p>
+        <p id="status">{{ .Strings.Get "status_loading" }}</p>
        {{end}}
-        {{if not .HideSpinner }}
-        <div id="spinner" class="lds-roller">
-            <div></div>
-            <div></div>
-            <div></div>
-            <div></div>
-            <div></div>
-            <div></div>
-            <div></div>
-            <div></div>
-        </div>
-        {{end}}
-        <details style="padding-bottom: 2em;">
-            <summary>Why am I seeing this?</summary>
-            <p>You are seeing this because the administrator of this website has set up <a href="https://git.gammaspectra.live/git/go-away">go-away</a> to protect the server against the scourge of <a href="https://thelibre.news/foss-infrastructure-is-under-attack-by-ai-companies/">AI companies aggressively scraping websites</a>. This can and does cause downtime for the websites, which makes their resources inaccessible for everyone.</p>
-            <p>Please note that some challenges requires the use of modern JavaScript features and some plugins may will disable. Please disable such plugins for this domain (for example, JShelter).</p>
-            <p>If you have any issues contact the administrator and provide this Request Id: <em>{{ .Id }}</em></p>
+        <details>
+            <summary>{{ .Strings.Get "details_title" }}</summary>
+
+            {{.Strings.Get "details_text"}}
        </details>

-        <noscript>
-            <p>
-                Sadly, you may need to enable JavaScript to get past this challenge. This is required because AI companies have changed
-                the social contract around how website hosting works.
-            </p>
-        </noscript>
-
        {{if .Redirect }}
-            <a role="button" href="{{ .Redirect }}">Refresh page</a>
+            <a style="margin-top: 2em; margin-bottom: 2em;" role="button" href="{{ .Redirect }}">{{ .Strings.Get "button_refresh_page" }}</a>
        {{end}}

-        <div id="testarea"></div>
+        {{if .EndTags }}
+            <noscript>
+                {{ .Strings.Get "noscript_warning" }}
+            </noscript>
+        {{end}}
+
+        <p><small>{{ .Strings.Get "details_contact_admin_with_request_id" }}: <em>{{ .Id }}</em></small></p>
    </div>


@@ -198,6 +59,10 @@
        <center>
            <p>
                Protected by <a href="https://git.gammaspectra.live/git/go-away">go-away</a> :: Request Id <em>{{ .Id }}</em>
+
+                {{ range .Links }}
+                    :: <a href="{{ .URL }}">{{ .Name }}</a>
+                {{ end }}
            </p>
        </center>
    </footer>
--- a/embed/templates/challenge-forgejo.gohtml
+++ b/embed/templates/challenge-forgejo.gohtml
@@ -8,7 +8,7 @@
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <title>{{ .Title }}</title>
-    <meta name="referrer" content="no-referrer">
+    <meta name="referrer" content="origin">

    {{ range $key, $value := .Meta }}
        {{ if eq $key "refresh"}}
@@ -61,36 +61,30 @@
                    </h2>

                    {{if .Challenge }}
-                    <h3 id="status">Loading challenge <em>{{ .Challenge }}</em>...</h3>
+                    <h3 id="status">{{ .Strings.Get "status_loading_challenge" }} <em>{{ .Challenge }}</em>...</h3>
                    {{else if .Error}}
-                    <h3 id="status">Error: {{ .Error }}</h3>
+                    <h3 id="status">{{ .Strings.Get "status_error" }} {{ .Error }}</h3>
                    {{else}}
-                    <h3 id="status">Loading...</h3>
+                    <h3 id="status">{{ .Strings.Get "status_loading" }}</h3>
                    {{end}}
-                    <div id="spinner"></div>

-                    <details style="padding-bottom: 2em;">
-                        <summary>Why am I seeing this?</summary>
-                        <p>You are seeing this because the administrator of this website has set up <a href="https://git.gammaspectra.live/git/go-away">go-away</a> to protect the server against the scourge of <a href="https://thelibre.news/foss-infrastructure-is-under-attack-by-ai-companies/">AI companies aggressively scraping websites</a>. This can and does cause downtime for the websites, which makes their resources inaccessible for everyone.</p>
-                        <p>Please note that some challenges requires the use of modern JavaScript features and some plugins may will disable. Please disable such plugins for this domain (for example, JShelter).</p>
-                        <p>If you have any issues contact the administrator and provide the Request Id: <em>{{ .Id }}</em></p>
+                    <details>
+                        <summary>{{ .Strings.Get "details_title" }}</summary>
+
+                        {{.Strings.Get "details_text"}}
                    </details>

-                    <noscript>
-                        <p>
-                            Sadly, you may need to enable JavaScript to get past this challenge. This is required because AI companies have changed
-                            the social contract around how website hosting works.
-                        </p>
-                    </noscript>
-
                    {{if .Redirect }}
-                    <div class="button-row">
-                        <a role="button" class="ui small primary button" href="{{ .Redirect }}">Refresh page</a>
-                    </div>
+                        <div class="button-row" style="margin-top: 2em; margin-bottom: 2em;" >
+                            <a role="button" class="ui small primary button" href="{{ .Redirect }}">{{ .Strings.Get "button_refresh_page" }}</a>
+                        </div>
                    {{end}}

+                    <noscript>
+                        {{ .Strings.Get "noscript" }}
+                    </noscript>

-                    <div id="testarea"></div>
+                    <p><small>{{ .Strings.Get "details_contact_admin_with_request_id" }}: <em>{{ .Id }}</em></small></p>
                </div>
            </div>
        </div>
@@ -106,6 +100,9 @@
 <footer class="page-footer" role="group" aria-label="">
    <div class="left-links" role="contentinfo" aria-label="">
        Protected by <a href="https://git.gammaspectra.live/git/go-away">go-away</a> :: Request Id <em>{{ .Id }}</em>
+        {{ range .Links }}
+            :: <a href="{{ .URL }}">{{ .Name }}</a>
+        {{ end }}
    </div>
 </footer>

--- a/examples/config.yml
+++ b/examples/config.yml
@@ -0,0 +1,101 @@
+# Configuration file
+# Parameters that exist both on config and cmdline will have cmdline as preference
+
+bind:
+  #address: ":8080"
+  #network: "tcp"
+  #socket-mode": "0770"
+
+  # Enable PROXY mode on this listener, to allow passing origin info. Default false
+  #proxy: true
+
+  # Enable passthrough mode, which will allow traffic onto the backends while rules load. Default false
+  #passthrough: true
+
+  # Enable TLS on this listener and obtain certificates via an ACME directory URL, or letsencrypt
+  #tls-acme-autocert: "letsencrypt"
+
+  # Enable TLS on this listener and obtain certificates via a certificate and key file on disk
+  # Only set one of tls-acme-autocert or tls-certificate+tls-key
+  #tls-certificate: ""
+  #tls-key: ""
+
+# Bind the Go debug port
+#bind-debug: ":6060"
+
+# Bind the Prometheus metrics onto /metrics path on this port
+#bind-metrics ":9090"
+
+# These links will be shown on the presented challenge or error pages
+links:
+  #- name: Privacy
+  #  url: "/privacy.html"
+
+  #- name: Contact
+  #  url: "mailto:admin@example.com"
+
+  #- name: Donations
+  #  url: "https://donations.example.com/abcd"
+
+# HTML Template to use for challenge or error pages
+# External templates can be included by providing a disk path
+# Bundled templates:
+#  anubis: An Anubis-like template with no configuration parameters
+#  forgejo: Looks like native Forgejo. Includes logos and resources from your instance. Supports Theme.
+#
+#challenge-template: "anubis"
+
+# Allows overriding specific settings set on templates. Key-Values will be passed to templates as-is
+challenge-template-overrides:
+  # Set template theme if supported
+  #Theme: "forgejo-auto"
+
+# Advanced backend configuration
+# Backends setup via cmdline will be added here
+backends:
+  # Example HTTP backend and setting client ip header
+  #"git.example.com":
+  #  url: "http://forgejo:3000"
+  #  ip-header: "X-Client-Ip"
+
+
+  # Example HTTPS backend with host/SNI override, HTTP/2 and no certificate verification
+  #"ssl.example.com":
+  #  url: "https://127.0.0.1:8443"
+  #  host: ssl.example.com
+  #  http2-enabled: true
+  #  tls-skip-verify: true
+
+# List of strings you can replace to alter the presentation on challenge/error templates
+# Can use other languages.
+# Note raw HTML is allowed, be careful with it.
+# Default strings exist in code, uncomment any to set it
+strings:
+  #title_challenge: "Checking you are not a bot"
+  #title_error: "Oh no!"
+  #noscript_warning: "<p>Sadly, you may need to enable JavaScript to get past this challenge. This is required because AI companies have changed the social contract around how website hosting works.</p>"
+  #details_title: "Why am I seeing this?"
+  #details_text: >
+  #  <p>
+  #  You are seeing this because the administrator of this website has set up <a href="https://git.gammaspectra.live/git/go-away">go-away</a>
+  #  to protect the server against the scourge of <a href="https://thelibre.news/foss-infrastructure-is-under-attack-by-ai-companies/">AI companies aggressively scraping websites</a>.
+  #  </p>
+  #  <p>
+  #  Mass scraping can and does cause downtime for the websites, which makes their resources inaccessible for everyone.
+  #  </p>
+  #  <p>
+  #  Please note that some challenges requires the use of modern JavaScript features and some plugins may disable these.
+  #  Disable such plugins for this domain (for example, JShelter) if you encounter any issues.
+  #  </p>
+
+  #details_contact_admin_with_request_id: "If you have any issues contact the site administrator and provide the following Request Id"
+
+  #button_refresh_page: "Refresh page"
+
+  #status_loading_challenge: "Loading challenge"
+  #status_starting_challenge: "Starting challenge"
+  #status_loading: "Loading..."
+  #status_calculating: "Calculating..."
+  #status_challenge_success: "Challenge success!"
+  #status_challenge_done_took: "Done! Took"
+  #status_error: "Error:"
--- a/examples/forgejo.yml
+++ b/examples/forgejo.yml
@@ -92,6 +92,16 @@ rules:
      - '($is-static-asset)'
    action: pass

+  - name: desired-crawlers
+    conditions:
+      - *is-bot-googlebot
+      - *is-bot-bingbot
+      - *is-bot-duckduckbot
+      - *is-bot-kagibot
+      - *is-bot-qwantbot
+      - *is-bot-yandexbot
+    action: pass
+
  - name: undesired-networks
    conditions:
      - 'remoteAddress.network("huawei-cloud") || remoteAddress.network("alibaba-cloud") || remoteAddress.network("zenlayer-inc")'
@@ -106,7 +116,7 @@ rules:
      - 'userAgent.matches("^Opera/[0-9.]+\\.\\(")'
      # AI bullshit stuff, they do not respect robots.txt even while they read it
      # TikTok Bytedance AI training
-      - 'userAgent.contains("Bytedance") || userAgent.contains("Bytespider")'
+      - 'userAgent.contains("Bytedance") || userAgent.contains("Bytespider") || userAgent.contains("TikTokSpider")'
      # Meta AI training; The Meta-ExternalAgent crawler crawls the web for use cases such as training AI models or improving products by indexing content directly.
      - 'userAgent.contains("meta-externalagent/") || userAgent.contains("meta-externalfetcher/") || userAgent.contains("FacebookBot")'
      # Anthropic AI training and usage
@@ -196,6 +206,7 @@ rules:
      # OCI packages API and package managers
      - 'path.startsWith("/api/packages/") || path == "/api/packages"'
      - 'path.startsWith("/v2/") || path == "/v2"'
+      - 'path.endsWith("/branches/list") || path.endsWith("/tags/list")'
    action: pass

  - name: preview-fetchers
@@ -220,16 +231,6 @@ rules:
      - '(path.matches("^/[^/]+/[^/]+/?$") || path.matches("^/[^/]+/[^/]+/badges/") || path.matches("^/[^/]+/[^/]+/(issues|pulls)/[0-9]+$") || (path.matches("^/[^/]+/?$") && size(query) == 0)) && !path.matches("(?i)^/(api|metrics|v2|assets|attachments|avatar|avatars|repo-avatars|captcha|login|org|repo|user|admin|devtest|explore|issues|pulls|milestones|notifications|ghost)(/|$)")'
    action: pass

-  - name: desired-crawlers
-    conditions:
-      - *is-bot-googlebot
-      - *is-bot-bingbot
-      - *is-bot-duckduckbot
-      - *is-bot-kagibot
-      - *is-bot-qwantbot
-      - *is-bot-yandexbot
-    action: pass
-
  # check a sequence of challenges
  - name: heavy-operations
    conditions: ['($is-heavy-resource)']
--- a/examples/generic.yml
+++ b/examples/generic.yml
@@ -50,6 +50,16 @@ rules:
      - '($is-static-asset)'
    action: pass

+  - name: desired-crawlers
+    conditions:
+      - *is-bot-googlebot
+      - *is-bot-bingbot
+      - *is-bot-duckduckbot
+      - *is-bot-kagibot
+      - *is-bot-qwantbot
+      - *is-bot-yandexbot
+    action: pass
+
  - name: undesired-crawlers
    conditions:
      - '($is-headless-chromium)'
@@ -59,7 +69,7 @@ rules:
      - 'userAgent.matches("^Opera/[0-9.]+\\.\\(")'
      # AI bullshit stuff, they do not respect robots.txt even while they read it
      # TikTok Bytedance AI training
-      - 'userAgent.contains("Bytedance") || userAgent.contains("Bytespider")'
+      - 'userAgent.contains("Bytedance") || userAgent.contains("Bytespider") || userAgent.contains("TikTokSpider")'
      # Meta AI training; The Meta-ExternalAgent crawler crawls the web for use cases such as training AI models or improving products by indexing content directly.
      - 'userAgent.contains("meta-externalagent/") || userAgent.contains("meta-externalfetcher/") || userAgent.contains("FacebookBot")'
      # Anthropic AI training and usage
@@ -98,16 +108,6 @@ rules:
        settings:
          challenges: [header-refresh]

-  - name: desired-crawlers
-    conditions:
-      - *is-bot-googlebot
-      - *is-bot-bingbot
-      - *is-bot-duckduckbot
-      - *is-bot-kagibot
-      - *is-bot-qwantbot
-      - *is-bot-yandexbot
-    action: pass
-
  - name: homesite
    conditions:
      - 'path == "/"'
--- a/examples/snippets/bot-uptimerobot.yml
+++ b/examples/snippets/bot-uptimerobot.yml
@@ -0,0 +1,8 @@
+networks:
+  uptimerobot:
+    - url: https://uptimerobot.com/inc/files/ips/IPv4andIPv6.txt
+      regex: "(?P<prefix>[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+(/[0-9]+)?|[0-9a-f:]+:.+)"
+
+conditions:
+  is-bot-uptimerobot:
+      - &is-bot-uptimerobot 'userAgent.contains("http://www.uptimerobot.com/") && remoteAddress.network("uptimerobot")'
--- a/go.mod
+++ b/go.mod
@@ -5,6 +5,7 @@ go 1.24.0
 toolchain go1.24.2

 require (
+	codeberg.org/gone/http-cel v1.0.0
 	codeberg.org/meta/gzipped/v2 v2.0.0-20231111234332-aa70c3194756
 	github.com/alphadose/haxmap v1.4.1
 	github.com/go-jose/go-jose/v4 v4.1.0
@@ -12,6 +13,7 @@ require (
 	github.com/google/cel-go v0.25.0
 	github.com/itchyny/gojq v0.12.17
 	github.com/pires/go-proxyproto v0.8.0
+	github.com/prometheus/client_golang v1.22.0
 	github.com/tetratelabs/wazero v1.9.0
 	github.com/yl2chen/cidranger v1.0.2
 	golang.org/x/crypto v0.37.0
@@ -20,11 +22,18 @@ require (
 require (
 	cel.dev/expr v0.23.1 // indirect
 	github.com/antlr4-go/antlr/v4 v4.13.1 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/itchyny/timefmt-go v0.1.6 // indirect
 	github.com/kevinpollet/nego v0.0.0-20211010160919-a65cd48cee43 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/prometheus/client_model v0.6.2 // indirect
+	github.com/prometheus/common v0.63.0 // indirect
+	github.com/prometheus/procfs v0.16.1 // indirect
 	github.com/stoewer/go-strcase v1.3.0 // indirect
 	golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0 // indirect
 	golang.org/x/net v0.39.0 // indirect
+	golang.org/x/sys v0.32.0 // indirect
 	golang.org/x/text v0.24.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20250422160041-2d3770c4ea7f // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20250422160041-2d3770c4ea7f // indirect
--- a/go.sum
+++ b/go.sum
@@ -1,11 +1,17 @@
 cel.dev/expr v0.23.1 h1:K4KOtPCJQjVggkARsjG9RWXP6O4R73aHeJMa/dmCQQg=
 cel.dev/expr v0.23.1/go.mod h1:hLPLo1W4QUmuYdA72RBX06QTs6MXw941piREPl3Yfiw=
+codeberg.org/gone/http-cel v1.0.0 h1:flEv/KzEye4W7vjwkdAkwo7VCbuj9xZLjyTn/rjWFDQ=
+codeberg.org/gone/http-cel v1.0.0/go.mod h1:uRkxygsQp5EFE3e9dRkJ4HK453G5YZDHCq9DEG5CoDw=
 codeberg.org/meta/gzipped/v2 v2.0.0-20231111234332-aa70c3194756 h1:bDqEUEYt4UJy8mfLCZeJuXx+xNJvdqTbkE4Ci11NQYU=
 codeberg.org/meta/gzipped/v2 v2.0.0-20231111234332-aa70c3194756/go.mod h1:aJ/ghJW7viYfwZ6OizDst+uJgbb6r/Hvoqhmi1OPTTw=
 github.com/alphadose/haxmap v1.4.1 h1:VtD6VCxUkjNIfJk/aWdYFfOzrRddDFjmvmRmILg7x8Q=
 github.com/alphadose/haxmap v1.4.1/go.mod h1:rjHw1IAqbxm0S3U5tD16GoKsiAd8FWx5BJ2IYqXwgmM=
 github.com/antlr4-go/antlr/v4 v4.13.1 h1:SqQKkuVZ+zWkMMNkjy5FZe5mr5WURWnlpmOuzYWrPrQ=
 github.com/antlr4-go/antlr/v4 v4.13.1/go.mod h1:GKmUxMtwp6ZgGwZSva4eWPC5mS6vUAmOABFgjdkM7Nw=
+github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
+github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -13,8 +19,6 @@ github.com/go-jose/go-jose/v4 v4.1.0 h1:cYSYxd3pw5zd2FSXk2vGdn9igQU2PS8MuxrCOCl0
 github.com/go-jose/go-jose/v4 v4.1.0/go.mod h1:GG/vqmYm3Von2nYiB2vGTXzdoNKE5tix5tuc6iAd+sw=
 github.com/goccy/go-yaml v1.17.1 h1:LI34wktB2xEE3ONG/2Ar54+/HJVBriAGJ55PHls4YuY=
 github.com/goccy/go-yaml v1.17.1/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
-github.com/google/cel-go v0.24.1 h1:jsBCtxG8mM5wiUJDSGUqU0K7Mtr3w7Eyv00rw4DiZxI=
-github.com/google/cel-go v0.24.1/go.mod h1:Hdf9TqOaTNSFQA1ybQaRqATVoK7m/zcf7IMhGXP5zI8=
 github.com/google/cel-go v0.25.0 h1:jsFw9Fhn+3y2kBbltZR4VEz5xKkcIFRPDnuEzAGv5GY=
 github.com/google/cel-go v0.25.0/go.mod h1:hjEb6r5SuOSlhCHmFoLzu8HGCERvIsDAbxDAyNU/MmI=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
@@ -25,10 +29,24 @@ github.com/itchyny/timefmt-go v0.1.6 h1:ia3s54iciXDdzWzwaVKXZPbiXzxxnv1SPGFfM/my
 github.com/itchyny/timefmt-go v0.1.6/go.mod h1:RRDZYC5s9ErkjQvTvvU7keJjxUYzIISJGxm9/mAERQg=
 github.com/kevinpollet/nego v0.0.0-20211010160919-a65cd48cee43 h1:Pdirg1gwhEcGjMLyuSxGn9664p+P8J9SrfMgpFwrDyg=
 github.com/kevinpollet/nego v0.0.0-20211010160919-a65cd48cee43/go.mod h1:ahLMuLCUyDdXqtqGyuwGev7/PGtO7r7ocvdwDuEN/3E=
+github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
+github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
+github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
+github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
+github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
+github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
 github.com/pires/go-proxyproto v0.8.0 h1:5unRmEAPbHXHuLjDg01CxJWf91cw3lKHc/0xzKpXEe0=
 github.com/pires/go-proxyproto v0.8.0/go.mod h1:iknsfgnH8EkjrMeMyvfKByp9TiBZCKZM0jx2xmKqnVY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/prometheus/client_golang v1.22.0 h1:rb93p9lokFEsctTys46VnV1kLCDpVZ0a/Y92Vm0Zc6Q=
+github.com/prometheus/client_golang v1.22.0/go.mod h1:R7ljNsLXhuQXYZYtw6GAE9AZg8Y7vEW5scdCXrWRXC0=
+github.com/prometheus/client_model v0.6.2 h1:oBsgwpGs7iVziMvrGhE53c/GrLUsZdHnqNwqPLxwZyk=
+github.com/prometheus/client_model v0.6.2/go.mod h1:y3m2F6Gdpfy6Ut/GBsUqTWZqCUvMVzSfMLjcu6wAwpE=
+github.com/prometheus/common v0.63.0 h1:YR/EIY1o3mEFP/kZCD7iDMnLPlGyuU2Gb3HIcXnA98k=
+github.com/prometheus/common v0.63.0/go.mod h1:VVFF/fBIoToEnWRVkYoXEkq3R3paCoxG9PXP74SnV18=
+github.com/prometheus/procfs v0.16.1 h1:hZ15bTNuirocR6u0JZ6BAHHmwS1p8B4P6MRqxtzMyRg=
+github.com/prometheus/procfs v0.16.1/go.mod h1:teAbpZRB1iIAJYREa1LsoWUXykVXA1KlTmWl8x/U+Is=
 github.com/stoewer/go-strcase v1.3.0 h1:g0eASXYtp+yvN9fK8sH94oCIk0fau9uV1/ZdJ0AVEzs=
 github.com/stoewer/go-strcase v1.3.0/go.mod h1:fAH5hQ5pehh+j3nZfvwdk2RgEgQjAoM8wodgtPmh1xo=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
@@ -50,14 +68,12 @@ golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0 h1:R84qjqJb5nVJMxqWYb3np9L5Z
 golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0/go.mod h1:S9Xr4PYopiDyqSyp5NjCrhFrqg6A5zA2E/iPHPhqnS8=
 golang.org/x/net v0.39.0 h1:ZCu7HMWDxpXpaiKdhzIfaltL9Lp31x/3fCP11bc6/fY=
 golang.org/x/net v0.39.0/go.mod h1:X7NRbYVEA+ewNkCNyJ513WmMdQ3BineSwVtN2zD/d+E=
+golang.org/x/sys v0.32.0 h1:s77OFDvIQeibCmezSnk/q6iAfkdiQaJi4VzroCFrN20=
+golang.org/x/sys v0.32.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/text v0.24.0 h1:dd5Bzh4yt5KYA8f9CJHCP4FB4D51c2c6JvN37xJJkJ0=
 golang.org/x/text v0.24.0/go.mod h1:L8rBsPeo2pSS+xqN0d5u2ikmjtmoJbDBT1b7nHvFCdU=
-google.golang.org/genproto/googleapis/api v0.0.0-20250414145226-207652e42e2e h1:UdXH7Kzbj+Vzastr5nVfccbmFsmYNygVLSPk1pEfDoY=
-google.golang.org/genproto/googleapis/api v0.0.0-20250414145226-207652e42e2e/go.mod h1:085qFyf2+XaZlRdCgKNCIZ3afY2p4HHZdoIRpId8F4A=
 google.golang.org/genproto/googleapis/api v0.0.0-20250422160041-2d3770c4ea7f h1:tjZsroqekhC63+WMqzmWyW5Twj/ZfR5HAlpd5YQ1Vs0=
 google.golang.org/genproto/googleapis/api v0.0.0-20250422160041-2d3770c4ea7f/go.mod h1:Cd8IzgPo5Akum2c9R6FsXNaZbH3Jpa2gpHlW89FqlyQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20250414145226-207652e42e2e h1:ztQaXfzEXTmCBvbtWYRhJxW+0iJcz2qXfd38/e9l7bA=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20250414145226-207652e42e2e/go.mod h1:qQ0YXyHHx3XkvlzUtpXDkS29lDSafHMZBAZDc03LQ3A=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20250422160041-2d3770c4ea7f h1:N/PrbTw4kdkqNRzVfWPrBekzLuarFREcbFOiOLkXon4=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20250422160041-2d3770c4ea7f/go.mod h1:qQ0YXyHHx3XkvlzUtpXDkS29lDSafHMZBAZDc03LQ3A=
 google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
--- a/lib/action/challenge.go
+++ b/lib/action/challenge.go
@@ -43,7 +43,8 @@ func init() {
 			return nil, fmt.Errorf("no registered challenges found in rule %s", ruleName)
 		}

-		passHandler, ok := Register[policy.RuleAction(strings.ToUpper(params.PassAction))]
+		passAction := policy.RuleAction(strings.ToUpper(params.PassAction))
+		passHandler, ok := Register[passAction]
 		if !ok {
 			return nil, fmt.Errorf("unknown pass action %s", params.PassAction)
 		}
@@ -53,7 +54,8 @@ func init() {
 			return nil, err
 		}

-		failHandler, ok := Register[policy.RuleAction(strings.ToUpper(params.FailAction))]
+		failAction := policy.RuleAction(strings.ToUpper(params.FailAction))
+		failHandler, ok := Register[failAction]
 		if !ok {
 			return nil, fmt.Errorf("unknown pass action %s", params.FailAction)
 		}
@@ -69,8 +71,10 @@ func init() {
 			Continue:   cont,
 			Challenges: regs,

-			PassAction: passActionHandler,
-			FailAction: failActionHandler,
+			PassAction:        passAction,
+			PassActionHandler: passActionHandler,
+			FailAction:        failAction,
+			FailActionHandler: failActionHandler,
 		}, nil
 	}
 	Register[policy.RuleActionCHALLENGE] = func(state challenge.StateInterface, ruleName, ruleHash string, settings ast.Node) (Handler, error) {
@@ -104,20 +108,26 @@ type Challenge struct {
 	Continue   bool
 	Challenges []*challenge.Registration

-	PassAction Handler
-	FailAction Handler
+	PassAction        policy.RuleAction
+	PassActionHandler Handler
+	FailAction        policy.RuleAction
+	FailActionHandler Handler
 }

 func (a Challenge) Handle(logger *slog.Logger, w http.ResponseWriter, r *http.Request, done func() (backend http.Handler)) (next bool, err error) {
 	data := challenge.RequestDataFromContext(r.Context())
 	for _, reg := range a.Challenges {
 		if data.HasValidChallenge(reg.Id()) {
+
+			data.State.ChallengeChecked(r, reg, r.URL.String(), logger)
+
 			if a.Continue {
 				return true, nil
 			}

 			// we passed!
-			return a.PassAction.Handle(logger.With("challenge", reg.Name), w, r, done)
+			data.State.ActionHit(r, a.PassAction, logger)
+			return a.PassActionHandler.Handle(logger.With("challenge", reg.Name), w, r, done)
 		}
 	}
 	// none matched, issue challenges in sequential priority
@@ -143,7 +153,8 @@ func (a Challenge) Handle(logger *slog.Logger, w http.ResponseWriter, r *http.Re
 				return true, nil
 			}

-			return a.PassAction.Handle(logger.With("challenge", reg.Name), w, r, done)
+			data.State.ActionHit(r, a.PassAction, logger)
+			return a.PassActionHandler.Handle(logger.With("challenge", reg.Name), w, r, done)
 		case challenge.VerifyResultNotOK:
 			// we have had the challenge checked, but it's not ok!
 			// safe to continue
@@ -157,7 +168,8 @@ func (a Challenge) Handle(logger *slog.Logger, w http.ResponseWriter, r *http.Re
 				continue
 			}

-			return a.FailAction.Handle(logger, w, r, done)
+			data.State.ActionHit(r, a.FailAction, logger)
+			return a.FailActionHandler.Handle(logger, w, r, done)
 		case challenge.VerifyResultNone:
 			// challenge was issued
 			if reg.Class == challenge.ClassTransparent {
@@ -174,5 +186,6 @@ func (a Challenge) Handle(logger *slog.Logger, w http.ResponseWriter, r *http.Re
 	}

 	// nothing matched, execute default action
-	return a.FailAction.Handle(logger, w, r, done)
+	data.State.ActionHit(r, a.FailAction, logger)
+	return a.FailActionHandler.Handle(logger, w, r, done)
 }
--- a/lib/challenge/data.go
+++ b/lib/challenge/data.go
@@ -1,20 +1,21 @@
 package challenge

 import (
+	http_cel "codeberg.org/gone/http-cel"
 	"context"
 	"crypto/rand"
 	"crypto/sha256"
 	"encoding/hex"
 	"errors"
 	"fmt"
-	"git.gammaspectra.live/git/go-away/lib/condition"
 	"git.gammaspectra.live/git/go-away/utils"
 	"github.com/google/cel-go/cel"
 	"github.com/google/cel-go/common/types"
 	"github.com/google/cel-go/common/types/traits"
-	"net"
 	"net/http"
+	"net/netip"
 	"net/textproto"
+	"strings"
 	"time"
 )

@@ -36,7 +37,7 @@ type RequestData struct {
 	Time            time.Time
 	ChallengeVerify map[Id]VerifyResult
 	ChallengeState  map[Id]VerifyState
-	RemoteAddress   net.IP
+	RemoteAddress   netip.AddrPort
 	State           StateInterface
 	CookiePrefix    string

@@ -57,7 +58,6 @@ func CreateRequestData(r *http.Request, state StateInterface) (*http.Request, *R
 	data.ChallengeState = make(map[Id]VerifyState, len(state.GetChallenges()))
 	data.Time = time.Now().UTC()
 	data.State = state
-	data.r = r

 	data.fp = make(map[string]string, 2)

@@ -74,8 +74,16 @@ func CreateRequestData(r *http.Request, state StateInterface) (*http.Request, *R
 		}
 	}

-	data.query = condition.NewValuesMap(r.URL.Query())
-	data.header = condition.NewMIMEMap(textproto.MIMEHeader(r.Header))
+	q := r.URL.Query()
+	// delete query parameters that were set by go-away
+	for k := range q {
+		if strings.HasPrefix(k, QueryArgPrefix) {
+			q.Del(k)
+		}
+	}
+
+	data.query = http_cel.NewValuesMap(q)
+	data.header = http_cel.NewMIMEMap(textproto.MIMEHeader(r.Header))

 	sum := sha256.New()
 	sum.Write([]byte(r.Host))
@@ -85,6 +93,8 @@ func CreateRequestData(r *http.Request, state StateInterface) (*http.Request, *R
 	data.CookiePrefix = utils.CookiePrefix + hex.EncodeToString(sum.Sum(nil)[:4]) + "-"

 	r = r.WithContext(context.WithValue(r.Context(), requestDataContextKey{}, &data))
+	r = utils.SetRemoteAddress(r, data.RemoteAddress)
+	data.r = r

 	return r, &data
 }
@@ -96,7 +106,7 @@ func (d *RequestData) ResolveName(name string) (any, bool) {
 	case "method":
 		return d.r.Method, true
 	case "remoteAddress":
-		return d.RemoteAddress, true
+		return d.RemoteAddress.Addr().AsSlice(), true
 	case "userAgent":
 		return d.r.UserAgent(), true
 	case "path":
--- a/lib/challenge/dnsbl/dnsbl.go
+++ b/lib/challenge/dnsbl/dnsbl.go
@@ -119,13 +119,9 @@ func FillRegistration(state challenge.StateInterface, reg *challenge.Registratio

 		data := challenge.RequestDataFromContext(r.Context())

-		result, err := lookup(r.Context(), params.Decay, params.Timeout, dnsbl, decayMap, data.RemoteAddress)
+		result, err := lookup(r.Context(), params.Decay, params.Timeout, dnsbl, decayMap, data.RemoteAddress.Addr().Unmap().AsSlice())
 		if err != nil {
-			data.State.Logger(r).Debug("dnsbl lookup failed", "address", data.RemoteAddress.String(), "result", result, "err", err)
-		}
-
-		if err != nil {
-			return challenge.VerifyResultFail
+			data.State.Logger(r).Debug("dnsbl lookup failed", "address", data.RemoteAddress.Addr().String(), "result", result, "err", err)
 		}

 		if result.Bad() {
--- a/lib/challenge/helper.go
+++ b/lib/challenge/helper.go
@@ -42,7 +42,7 @@ func GetVerifyInformation(r *http.Request, reg *Registration) (requestId Request
 	q := r.URL.Query()

 	if q.Get(QueryArgChallenge) != reg.Name {
-		return RequestId{}, "", "", fmt.Errorf("unexpected challenge: got %s", q.Get(QueryArgChallenge))
+		return RequestId{}, "", "", fmt.Errorf("unexpected challenge: got \"%s\"", q.Get(QueryArgChallenge))
 	}

 	requestIdHex := q.Get(QueryArgRequestId)
--- a/lib/challenge/key.go
+++ b/lib/challenge/key.go
@@ -47,7 +47,8 @@ func GetChallengeKeyForRequest(state StateInterface, reg *Registration, until ti
 	hasher.Write([]byte("challenge\x00"))
 	hasher.Write([]byte(reg.Name))
 	hasher.Write([]byte{0})
-	hasher.Write(address.To16())
+	ipBuf := address.Addr().Unmap().As16()
+	hasher.Write(ipBuf[:])
 	hasher.Write([]byte{0})

 	// specific headers
@@ -72,7 +73,7 @@ func GetChallengeKeyForRequest(state StateInterface, reg *Registration, until ti

 	sum[0] = 0

-	if address.To4() != nil {
+	if address.Addr().Unmap().Is4() {
 		// Is IPv4, mark
 		sum.Set(KeyFlagIsIPv4)
 	}
--- a/lib/challenge/register.go
+++ b/lib/challenge/register.go
@@ -2,10 +2,10 @@ package challenge

 import (
 	"bytes"
+	http_cel "codeberg.org/gone/http-cel"
 	"crypto/ed25519"
 	"errors"
 	"fmt"
-	"git.gammaspectra.live/git/go-away/lib/condition"
 	"git.gammaspectra.live/git/go-away/lib/policy"
 	"github.com/go-jose/go-jose/v4"
 	"github.com/go-jose/go-jose/v4/jwt"
@@ -67,11 +67,11 @@ func (r Register) Create(state StateInterface, name string, pol policy.Challenge
 	}

 	if len(conditions) > 0 {
-		ast, err := condition.FromStrings(state.ProgramEnv(), condition.OperatorOr, conditions...)
+		ast, err := http_cel.NewAst(state.ProgramEnv(), http_cel.OperatorOr, conditions...)
 		if err != nil {
 			return nil, 0, fmt.Errorf("error compiling conditions: %v", err)
 		}
-		reg.Condition, err = condition.Program(state.ProgramEnv(), ast)
+		reg.Condition, err = http_cel.ProgramAst(state.ProgramEnv(), ast)
 		if err != nil {
 			return nil, 0, fmt.Errorf("error compiling program: %v", err)
 		}
--- a/lib/challenge/script.go
+++ b/lib/challenge/script.go
@@ -33,6 +33,7 @@ func ServeChallengeScript(w http.ResponseWriter, r *http.Request, reg *Registrat
 		"Random":          utils.CacheBust(),
 		"Challenge":       reg.Name,
 		"ChallengeScript": script,
+		"Strings":         data.State.Options().Strings,
 	})
 	if err != nil {
 		//TODO: log
--- a/lib/challenge/script.mjs
+++ b/lib/challenge/script.mjs
@@ -14,9 +14,8 @@ const u = (url = "", params = {}) => {
 (async () => {
    const status = document.getElementById('status');
    const title = document.getElementById('title');
-    const spinner = document.getElementById('spinner');

-    status.innerText = 'Starting challenge {{ .Challenge }}...';
+    status.innerText = '{{ .Strings.Get "status_starting_challenge" }} {{ .Challenge }}...';

    try {
        const info = await setup({
@@ -25,15 +24,13 @@ const u = (url = "", params = {}) => {
        });

        if (info != "") {
-            status.innerText = 'Calculating... ' + info
+            status.innerText = '{{ .Strings.Get "status_calculating" }} ' + info
        } else {
-            status.innerText = 'Calculating...';
+            status.innerText = '{{ .Strings.Get "status_calculating" }}';
        }
    } catch (err) {
-        title.innerHTML = "Oh no!";
-        status.innerHTML = `Failed to initialize: ${err.message}`;
-        spinner.innerHTML = "";
-        spinner.style.display = "none";
+        title.innerHTML = '{{ .Strings.Get "title_error" }}';
+        status.innerHTML = `{{ .Strings.Get "status_error" }} ${err.message}`;
        return
    }

@@ -44,11 +41,11 @@ const u = (url = "", params = {}) => {
        const t1 = Date.now();
        console.log({ result, info });

-        title.innerHTML = "Challenge success!";
+        title.innerHTML = '{{ .Strings.Get "status_challenge_success" }}';
        if (info != "") {
-            status.innerHTML = `Done! Took ${t1 - t0}ms, ${info}`;
+            status.innerHTML = `{{ .Strings.Get "status_challenge_done_took" }} ${t1 - t0}ms, ${info}`;
        } else {
-            status.innerHTML = `Done! Took ${t1 - t0}ms`;
+            status.innerHTML = `{{ .Strings.Get "status_challenge_done_took" }} ${t1 - t0}ms`;
        }

        setTimeout(() => {
@@ -62,9 +59,7 @@ const u = (url = "", params = {}) => {
            });
        }, 500);
    } catch (err) {
-        title.innerHTML = "Oh no!";
-        status.innerHTML = `Failed to challenge: ${err.message}`;
-        spinner.innerHTML = "";
-        spinner.style.display = "none";
+        title.innerHTML = '{{ .Strings.Get "title_error" }}';
+        status.innerHTML = `{{ .Strings.Get "status_error" }} ${err.message}`;
    }
 })();
--- a/lib/challenge/types.go
+++ b/lib/challenge/types.go
@@ -3,6 +3,7 @@ package challenge
 import (
 	"crypto/ed25519"
 	"git.gammaspectra.live/git/go-away/lib/policy"
+	"git.gammaspectra.live/git/go-away/lib/settings"
 	"github.com/google/cel-go/cel"
 	"log/slog"
 	"net/http"
@@ -96,6 +97,11 @@ type StateInterface interface {
 	ChallengeFailed(r *http.Request, reg *Registration, err error, redirect string, logger *slog.Logger)
 	ChallengePassed(r *http.Request, reg *Registration, redirect string, logger *slog.Logger)
 	ChallengeIssued(r *http.Request, reg *Registration, redirect string, logger *slog.Logger)
+	ChallengeChecked(r *http.Request, reg *Registration, redirect string, logger *slog.Logger)
+
+	RuleHit(r *http.Request, name string, logger *slog.Logger)
+	RuleMiss(r *http.Request, name string, logger *slog.Logger)
+	ActionHit(r *http.Request, name policy.RuleAction, logger *slog.Logger)

 	Logger(r *http.Request) *slog.Logger

@@ -106,7 +112,9 @@ type StateInterface interface {
 	GetChallengeByName(name string) (*Registration, bool)
 	GetChallenges() Register

-	Settings() policy.Settings
+	Settings() policy.StateSettings
+
+	Options() settings.Settings

 	GetBackend(host string) http.Handler
 }
--- a/lib/condition/condition.go
+++ b/lib/condition/condition.go
@@ -1,177 +0,0 @@
-package condition
-
-import (
-	"fmt"
-	"github.com/google/cel-go/cel"
-	"github.com/google/cel-go/common/types"
-	"github.com/google/cel-go/common/types/ref"
-	"github.com/google/cel-go/ext"
-	"github.com/yl2chen/cidranger"
-	"log/slog"
-	"net"
-	"strings"
-)
-
-type Condition struct {
-	Expression *cel.Ast
-}
-
-const (
-	OperatorOr  = "||"
-	OperatorAnd = "&&"
-)
-
-func NewRulesEnvironment(networks map[string]cidranger.Ranger) (*cel.Env, error) {
-
-	return cel.NewEnv(
-		ext.Strings(
-			ext.StringsLocale("en_US"),
-			ext.StringsValidateFormatCalls(true),
-		),
-		cel.DefaultUTCTimeZone(true),
-		//TODO: custom type for remoteAddress
-		cel.Variable("remoteAddress", cel.BytesType),
-		cel.Variable("host", cel.StringType),
-		cel.Variable("method", cel.StringType),
-		cel.Variable("userAgent", cel.StringType),
-		cel.Variable("path", cel.StringType),
-		cel.Variable("query", cel.MapType(cel.StringType, cel.StringType)),
-		cel.Variable("fp", cel.MapType(cel.StringType, cel.StringType)),
-		// http.Header
-		cel.Variable("headers", cel.MapType(cel.StringType, cel.StringType)),
-		//TODO: dynamic type?
-		cel.Function("inDNSBL",
-			cel.Overload("inDNSBL_ip",
-				[]*cel.Type{cel.AnyType},
-				cel.BoolType,
-				cel.UnaryBinding(func(val ref.Val) ref.Val {
-					slog.Error("inDNSBL function has been deprecated, replace with dnsbl challenge")
-					return types.Bool(false)
-				}),
-			),
-		),
-		cel.Function("network",
-			cel.MemberOverload("netIP_network_string",
-				[]*cel.Type{cel.BytesType, cel.StringType},
-				cel.BoolType,
-				cel.BinaryBinding(func(lhs ref.Val, rhs ref.Val) ref.Val {
-					var ip net.IP
-					switch v := lhs.Value().(type) {
-					case []byte:
-						ip = v
-					case net.IP:
-						ip = v
-					}
-
-					if ip == nil {
-						panic(fmt.Errorf("invalid ip %v", lhs.Value()))
-					}
-
-					val, ok := rhs.Value().(string)
-					if !ok {
-						panic(fmt.Errorf("invalid network value %v", rhs.Value()))
-					}
-
-					network, ok := networks[val]
-					if !ok {
-						_, ipNet, err := net.ParseCIDR(val)
-						if err != nil {
-							panic("network not found")
-						}
-						return types.Bool(ipNet.Contains(ip))
-					} else {
-						ok, err := network.Contains(ip)
-						if err != nil {
-							panic(err)
-						}
-						return types.Bool(ok)
-					}
-				}),
-			),
-		),
-
-		cel.Function("inNetwork",
-			cel.Overload("inNetwork_string_ip",
-				[]*cel.Type{cel.StringType, cel.BytesType},
-				cel.BoolType,
-				cel.BinaryBinding(func(lhs ref.Val, rhs ref.Val) ref.Val {
-					var ip net.IP
-					switch v := rhs.Value().(type) {
-					case []byte:
-						ip = v
-					case net.IP:
-						ip = v
-					}
-
-					if ip == nil {
-						panic(fmt.Errorf("invalid ip %v", rhs.Value()))
-					}
-
-					val, ok := lhs.Value().(string)
-					if !ok {
-						panic(fmt.Errorf("invalid value %v", lhs.Value()))
-					}
-					slog.Debug(fmt.Sprintf("inNetwork function has been deprecated and will be removed in a future release, use remoteAddress.network(\"%s\") instead", val))
-
-					network, ok := networks[val]
-					if !ok {
-						_, ipNet, err := net.ParseCIDR(val)
-						if err != nil {
-							panic("network not found")
-						}
-						return types.Bool(ipNet.Contains(ip))
-					} else {
-						ok, err := network.Contains(ip)
-						if err != nil {
-							panic(err)
-						}
-						return types.Bool(ok)
-					}
-				}),
-			),
-		),
-	)
-}
-
-func Program(env *cel.Env, ast *cel.Ast) (cel.Program, error) {
-	return env.Program(ast,
-		cel.EvalOptions(cel.OptOptimize),
-	)
-}
-
-func FromStrings(env *cel.Env, operator string, conditions ...string) (*cel.Ast, error) {
-	var asts []*cel.Ast
-	for _, c := range conditions {
-		ast, issues := env.Compile(c)
-		if issues != nil && issues.Err() != nil {
-			return nil, fmt.Errorf("condition %s: %s", issues.Err(), c)
-		}
-		asts = append(asts, ast)
-	}
-
-	return Merge(env, operator, asts...)
-}
-
-func Merge(env *cel.Env, operator string, conditions ...*cel.Ast) (*cel.Ast, error) {
-	if len(conditions) == 0 {
-		return nil, nil
-	} else if len(conditions) == 1 {
-		return conditions[0], nil
-	}
-	var asts []string
-	for _, c := range conditions {
-		ast, err := cel.AstToString(c)
-		if err != nil {
-			return nil, err
-		}
-		asts = append(asts, "("+ast+")")
-	}
-
-	condition := strings.Join(asts, " "+operator+" ")
-	ast, issues := env.Compile(condition)
-	if issues != nil && issues.Err() != nil {
-		return nil, issues.Err()
-	}
-
-	return ast, nil
-}
--- a/lib/condition/map.go
+++ b/lib/condition/map.go
@@ -1,158 +0,0 @@
-package condition
-
-import (
-	"fmt"
-	"github.com/google/cel-go/common/types"
-	"github.com/google/cel-go/common/types/ref"
-	"github.com/google/cel-go/common/types/traits"
-	"net/textproto"
-	"reflect"
-	"strings"
-)
-
-type mimeLike struct {
-	m textproto.MIMEHeader
-}
-
-func (a mimeLike) ConvertToNative(typeDesc reflect.Type) (any, error) {
-	return nil, fmt.Errorf("type conversion error from map to '%v'", typeDesc)
-}
-
-func (a mimeLike) ConvertToType(typeVal ref.Type) ref.Val {
-	switch typeVal {
-	case types.MapType:
-		return a
-	case types.TypeType:
-		return types.MapType
-	}
-	return types.NewErr("type conversion error from '%s' to '%s'", types.MapType, typeVal)
-}
-
-func (a mimeLike) Equal(other ref.Val) ref.Val {
-	return types.Bool(false)
-}
-
-func (a mimeLike) Type() ref.Type {
-	return types.MapType
-}
-
-func (a mimeLike) Value() any {
-	return a.m
-}
-
-func (a mimeLike) Contains(key ref.Val) ref.Val {
-	_, found := a.Find(key)
-	return types.Bool(found)
-}
-
-func (a mimeLike) Get(key ref.Val) ref.Val {
-	v, found := a.Find(key)
-	if !found {
-		return types.ValOrErr(v, "no such key: %v", key)
-	}
-	return v
-}
-
-func (a mimeLike) Iterator() traits.Iterator {
-	panic("implement me")
-}
-
-func (a mimeLike) IsZeroValue() bool {
-	return len(a.m) == 0
-}
-
-func (a mimeLike) Size() ref.Val {
-	return types.Int(len(a.m))
-}
-
-func (a mimeLike) Find(key ref.Val) (ref.Val, bool) {
-	k, ok := key.(types.String)
-	if !ok {
-		return nil, false
-	}
-
-	return singleVal(a.m.Values(string(k)), true)
-}
-
-type valuesLike struct {
-	m map[string][]string
-}
-
-func (a valuesLike) ConvertToNative(typeDesc reflect.Type) (any, error) {
-	return nil, fmt.Errorf("type conversion error from map to '%v'", typeDesc)
-}
-
-func (a valuesLike) ConvertToType(typeVal ref.Type) ref.Val {
-	switch typeVal {
-	case types.MapType:
-		return a
-	case types.TypeType:
-		return types.MapType
-	}
-	return types.NewErr("type conversion error from '%s' to '%s'", types.MapType, typeVal)
-}
-
-func (a valuesLike) Equal(other ref.Val) ref.Val {
-	return types.Bool(false)
-}
-
-func (a valuesLike) Type() ref.Type {
-	return types.MapType
-}
-
-func (a valuesLike) Value() any {
-	return a.m
-}
-
-func (a valuesLike) Contains(key ref.Val) ref.Val {
-	_, found := a.Find(key)
-	return types.Bool(found)
-}
-
-func (a valuesLike) Get(key ref.Val) ref.Val {
-	v, found := a.Find(key)
-	if !found {
-		return types.ValOrErr(v, "no such key: %v", key)
-	}
-	return v
-}
-
-func (a valuesLike) Iterator() traits.Iterator {
-	panic("implement me")
-}
-
-func (a valuesLike) IsZeroValue() bool {
-	return len(a.m) == 0
-}
-
-func (a valuesLike) Size() ref.Val {
-	return types.Int(len(a.m))
-}
-
-func (a valuesLike) Find(key ref.Val) (ref.Val, bool) {
-	k, ok := key.(types.String)
-	if !ok {
-		return nil, false
-	}
-
-	val, ok := a.m[string(k)]
-	return singleVal(val, ok)
-}
-
-func singleVal(values []string, ok bool) (ref.Val, bool) {
-	if len(values) == 0 || !ok {
-		return nil, false
-	}
-	if len(values) > 1 {
-		return types.String(strings.Join(values, ",")), true
-	}
-	return types.String(values[0]), true
-}
-
-func NewMIMEMap(m textproto.MIMEHeader) traits.Mapper {
-	return mimeLike{m: m}
-}
-
-func NewValuesMap(m map[string][]string) traits.Mapper {
-	return valuesLike{m: m}
-}
--- a/lib/conditions.go
+++ b/lib/conditions.go
@@ -1,11 +1,111 @@
 package lib

 import (
-	"git.gammaspectra.live/git/go-away/lib/condition"
+	http_cel "codeberg.org/gone/http-cel"
+	"fmt"
+	"github.com/google/cel-go/cel"
+	"github.com/google/cel-go/common/types"
+	"github.com/google/cel-go/common/types/ref"
+	"log/slog"
+	"net"
 )

 func (state *State) initConditions() (err error) {
-	state.programEnv, err = condition.NewRulesEnvironment(state.networks)
+	state.programEnv, err = http_cel.NewEnvironment(
+
+		cel.Variable("fp", cel.MapType(cel.StringType, cel.StringType)),
+		cel.Function("inDNSBL",
+			cel.Overload("inDNSBL_ip",
+				[]*cel.Type{cel.AnyType},
+				cel.BoolType,
+				cel.UnaryBinding(func(val ref.Val) ref.Val {
+					slog.Error("inDNSBL function has been deprecated, replace with dnsbl challenge")
+					return types.Bool(false)
+				}),
+			),
+		),
+
+		cel.Function("network",
+			cel.MemberOverload("netIP_network_string",
+				[]*cel.Type{cel.BytesType, cel.StringType},
+				cel.BoolType,
+				cel.BinaryBinding(func(lhs ref.Val, rhs ref.Val) ref.Val {
+					var ip net.IP
+					switch v := lhs.Value().(type) {
+					case []byte:
+						ip = v
+					case net.IP:
+						ip = v
+					}
+
+					if ip == nil {
+						panic(fmt.Errorf("invalid ip %v", lhs.Value()))
+					}
+
+					val, ok := rhs.Value().(string)
+					if !ok {
+						panic(fmt.Errorf("invalid network value %v", rhs.Value()))
+					}
+
+					network, ok := state.networks[val]
+					if !ok {
+						_, ipNet, err := net.ParseCIDR(val)
+						if err != nil {
+							panic("network not found")
+						}
+						return types.Bool(ipNet.Contains(ip))
+					} else {
+						ok, err := network.Contains(ip)
+						if err != nil {
+							panic(err)
+						}
+						return types.Bool(ok)
+					}
+				}),
+			),
+		),
+
+		cel.Function("inNetwork",
+			cel.Overload("inNetwork_string_ip",
+				[]*cel.Type{cel.StringType, cel.BytesType},
+				cel.BoolType,
+				cel.BinaryBinding(func(lhs ref.Val, rhs ref.Val) ref.Val {
+					var ip net.IP
+					switch v := rhs.Value().(type) {
+					case []byte:
+						ip = v
+					case net.IP:
+						ip = v
+					}
+
+					if ip == nil {
+						panic(fmt.Errorf("invalid ip %v", rhs.Value()))
+					}
+
+					val, ok := lhs.Value().(string)
+					if !ok {
+						panic(fmt.Errorf("invalid value %v", lhs.Value()))
+					}
+					slog.Debug(fmt.Sprintf("inNetwork function has been deprecated and will be removed in a future release, use remoteAddress.network(\"%s\") instead", val))
+
+					network, ok := state.networks[val]
+					if !ok {
+						_, ipNet, err := net.ParseCIDR(val)
+						if err != nil {
+							panic("network not found")
+						}
+						return types.Bool(ipNet.Contains(ip))
+					} else {
+						ok, err := network.Contains(ip)
+						if err != nil {
+							panic(err)
+						}
+						return types.Bool(ok)
+					}
+				}),
+			),
+		),
+	)
 	if err != nil {
 		return err
 	}
--- a/lib/http.go
+++ b/lib/http.go
@@ -6,62 +6,18 @@ import (
 	"git.gammaspectra.live/git/go-away/embed"
 	"git.gammaspectra.live/git/go-away/lib/action"
 	"git.gammaspectra.live/git/go-away/lib/challenge"
+	"git.gammaspectra.live/git/go-away/lib/policy"
 	"git.gammaspectra.live/git/go-away/utils"
-	"html/template"
 	"log/slog"
 	"net/http"
-	"net/http/pprof"
-	"strconv"
 	"strings"
-	"time"
 )

-var templates map[string]*template.Template
-
-func init() {
-
-	templates = make(map[string]*template.Template)
-
-	dir, err := embed.TemplatesFs.ReadDir(".")
-	if err != nil {
-		panic(err)
-	}
-	for _, e := range dir {
-		if e.IsDir() {
-			continue
-		}
-		data, err := embed.TemplatesFs.ReadFile(e.Name())
-		if err != nil {
-			panic(err)
-		}
-		err = initTemplate(e.Name(), string(data))
-		if err != nil {
-			panic(err)
-		}
-	}
-}
-
-func initTemplate(name, data string) error {
-	tpl := template.New(name)
-	_, err := tpl.Parse(data)
-	if err != nil {
-		return err
-	}
-	templates[name] = tpl
-	return nil
-}
-
-func (state *State) addTiming(w http.ResponseWriter, name, desc string, duration time.Duration) {
-	if state.Settings().Debug {
-		w.Header().Add("Server-Timing", fmt.Sprintf("%s;desc=%s;dur=%d", name, strconv.Quote(desc), duration.Milliseconds()))
-	}
-}
-
 func GetLoggerForRequest(r *http.Request) *slog.Logger {
 	data := challenge.RequestDataFromContext(r.Context())
 	args := []any{
 		"request_id", data.Id.String(),
-		"remote_address", data.RemoteAddress.String(),
+		"remote_address", data.RemoteAddress.Addr().String(),
 		"user_agent", r.UserAgent(),
 		"host", r.Host,
 		"path", r.URL.Path,
@@ -138,6 +94,9 @@ func (state *State) handleRequest(w http.ResponseWriter, r *http.Request) {
 		}
 	}

+	state.RuleHit(r, "DEFAULT", lg)
+	data.State.ActionHit(r, policy.RuleActionPASS, lg)
+
 	// default pass
 	_, _ = action.Pass{}.Handle(lg, w, r, func() http.Handler {
 		r.Header.Set("X-Away-Rule", "DEFAULT")
@@ -152,14 +111,6 @@ func (state *State) setupRoutes() error {

 	state.Mux.HandleFunc("/", state.handleRequest)

-	if state.Settings().Debug {
-		//TODO: split this to a different listener, metrics listener
-		http.HandleFunc(state.urlPath+"/debug/pprof/", pprof.Index)
-		http.HandleFunc(state.urlPath+"/debug/pprof/profile", pprof.Profile)
-		http.HandleFunc(state.urlPath+"/debug/pprof/symbol", pprof.Symbol)
-		http.HandleFunc(state.urlPath+"/debug/pprof/trace", pprof.Trace)
-	}
-
 	state.Mux.Handle("GET "+state.urlPath+"/assets/", http.StripPrefix(state.UrlPath()+"/assets/", gzipped.FileServer(gzipped.FS(embed.AssetsFs))))

 	for _, reg := range state.challenges {
--- a/lib/interface.go
+++ b/lib/interface.go
@@ -1,14 +1,13 @@
 package lib

 import (
-	"bytes"
 	"crypto/ed25519"
 	"git.gammaspectra.live/git/go-away/lib/challenge"
 	"git.gammaspectra.live/git/go-away/lib/policy"
+	"git.gammaspectra.live/git/go-away/lib/settings"
 	"git.gammaspectra.live/git/go-away/utils"
 	"github.com/google/cel-go/cel"
 	"log/slog"
-	"maps"
 	"net/http"
 )

@@ -42,7 +41,7 @@ func (state *State) ChallengeFailed(r *http.Request, reg *challenge.Registration
 	}
 	logger.Warn("challenge failed", "challenge", reg.Name, "err", err, "redirect", redirect)

-	//TODO: metrics
+	metrics.Challenge(reg.Name, "fail")
 }

 func (state *State) ChallengePassed(r *http.Request, reg *challenge.Registration, redirect string, logger *slog.Logger) {
@@ -51,7 +50,7 @@ func (state *State) ChallengePassed(r *http.Request, reg *challenge.Registration
 	}
 	logger.Warn("challenge passed", "challenge", reg.Name, "redirect", redirect)

-	//TODO: metrics
+	metrics.Challenge(reg.Name, "pass")
 }

 func (state *State) ChallengeIssued(r *http.Request, reg *challenge.Registration, redirect string, logger *slog.Logger) {
@@ -60,69 +59,29 @@ func (state *State) ChallengeIssued(r *http.Request, reg *challenge.Registration
 	}
 	logger.Info("challenge issued", "challenge", reg.Name, "redirect", redirect)

-	//TODO: metrics
+	metrics.Challenge(reg.Name, "issue")
+}
+
+func (state *State) ChallengeChecked(r *http.Request, reg *challenge.Registration, redirect string, logger *slog.Logger) {
+	metrics.Challenge(reg.Name, "check")
+}
+
+func (state *State) RuleHit(r *http.Request, name string, logger *slog.Logger) {
+	metrics.Rule(name, "hit")
+}
+
+func (state *State) RuleMiss(r *http.Request, name string, logger *slog.Logger) {
+	metrics.Rule(name, "miss")
+}
+
+func (state *State) ActionHit(r *http.Request, name policy.RuleAction, logger *slog.Logger) {
+	metrics.Action(name)
 }

 func (state *State) Logger(r *http.Request) *slog.Logger {
 	return GetLoggerForRequest(r)
 }

-func (state *State) ChallengePage(w http.ResponseWriter, r *http.Request, status int, reg *challenge.Registration, params map[string]any) {
-	data := challenge.RequestDataFromContext(r.Context())
-	input := make(map[string]any)
-	input["Id"] = data.Id.String()
-	input["Random"] = utils.CacheBust()
-	if reg != nil {
-		input["Challenge"] = reg.Name
-		input["Path"] = state.UrlPath()
-	}
-	input["Theme"] = state.Settings().ChallengeTemplateTheme
-
-	maps.Copy(input, params)
-
-	if _, ok := input["Title"]; !ok {
-		input["Title"] = "Checking you are not a bot"
-	}
-
-	w.Header().Set("Content-Type", "text/html; charset=utf-8")
-
-	buf := bytes.NewBuffer(make([]byte, 0, 8192))
-
-	err := templates["challenge-"+state.Settings().ChallengeTemplate+".gohtml"].Execute(buf, input)
-	if err != nil {
-		state.ErrorPage(w, r, http.StatusInternalServerError, err, "")
-	} else {
-		w.WriteHeader(status)
-		_, _ = w.Write(buf.Bytes())
-	}
-}
-
-func (state *State) ErrorPage(w http.ResponseWriter, r *http.Request, status int, err error, redirect string) {
-	data := challenge.RequestDataFromContext(r.Context())
-	w.Header().Set("Content-Type", "text/html; charset=utf-8")
-
-	buf := bytes.NewBuffer(make([]byte, 0, 8192))
-
-	err2 := templates["challenge-"+state.Settings().ChallengeTemplate+".gohtml"].Execute(buf, map[string]any{
-		"Id":          data.Id.String(),
-		"Random":      utils.CacheBust(),
-		"Error":       err.Error(),
-		"Path":        state.UrlPath(),
-		"Theme":       state.Settings().ChallengeTemplateTheme,
-		"Title":       "Oh no! " + http.StatusText(status),
-		"HideSpinner": true,
-		"Challenge":   "",
-		"Redirect":    redirect,
-	})
-	if err2 != nil {
-		// nested errors!
-		panic(err2)
-	} else {
-		w.WriteHeader(status)
-		_, _ = w.Write(buf.Bytes())
-	}
-}
-
 func (state *State) GetChallenge(id challenge.Id) (*challenge.Registration, bool) {
 	reg, ok := state.challenges.Get(id)
 	return reg, ok
@@ -136,10 +95,14 @@ func (state *State) GetChallengeByName(name string) (*challenge.Registration, bo
 	reg, _, ok := state.challenges.GetByName(name)
 	return reg, ok
 }
-func (state *State) Settings() policy.Settings {
+func (state *State) Settings() policy.StateSettings {
 	return state.settings
 }

+func (state *State) Options() settings.Settings {
+	return state.opt
+}
+
 func (state *State) GetBackend(host string) http.Handler {
 	return utils.SelectHTTPHandler(state.Settings().Backends, host)
 }
--- a/lib/metrics.go
+++ b/lib/metrics.go
@@ -0,0 +1,50 @@
+package lib
+
+import (
+	"git.gammaspectra.live/git/go-away/lib/policy"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+)
+
+type stateMetrics struct {
+	rules      *prometheus.CounterVec
+	actions    *prometheus.CounterVec
+	challenges *prometheus.CounterVec
+}
+
+func newMetrics() *stateMetrics {
+	return &stateMetrics{
+		rules: promauto.NewCounterVec(prometheus.CounterOpts{
+			Name: "go-away_rule_results",
+			Help: "The number of rule hits or misses",
+		}, []string{"rule", "result"}),
+		actions: promauto.NewCounterVec(prometheus.CounterOpts{
+			Name: "go-away_action_results",
+			Help: "The number of each action issued",
+		}, []string{"action"}),
+		challenges: promauto.NewCounterVec(prometheus.CounterOpts{
+			Name: "go-away_challenge_results",
+			Help: "The number of challenges issued, passed or explicitly failed",
+		}, []string{"challenge", "action"}),
+	}
+}
+
+func (metrics *stateMetrics) Rule(name, result string) {
+	metrics.rules.With(prometheus.Labels{"rule": name, "result": result}).Inc()
+}
+
+func (metrics *stateMetrics) Action(action policy.RuleAction) {
+	metrics.actions.With(prometheus.Labels{"action": string(action)}).Inc()
+}
+
+func (metrics *stateMetrics) Challenge(name, result string) {
+	metrics.challenges.With(prometheus.Labels{"challenge": name, "action": result}).Inc()
+}
+
+func (metrics *stateMetrics) Reset() {
+	metrics.rules.Reset()
+	metrics.actions.Reset()
+	metrics.challenges.Reset()
+}
+
+var metrics = newMetrics()
--- a/lib/policy/options.go
+++ b/lib/policy/options.go
@@ -1,22 +0,0 @@
-package policy
-
-import (
-	"git.gammaspectra.live/git/go-away/utils"
-	"net/http"
-)
-
-type Settings struct {
-	Cache                  utils.Cache
-	Backends               map[string]http.Handler
-	PrivateKeySeed         []byte
-	Debug                  bool
-	MainName               string
-	MainVersion            string
-	PackageName            string
-	ChallengeTemplate      string
-	ChallengeTemplateTheme string
-	ClientIpHeader         string
-	BackendIpHeader        string
-
-	ChallengeResponseCode int
-}
--- a/lib/policy/policy.go
+++ b/lib/policy/policy.go
@@ -20,66 +20,77 @@ type Policy struct {
 	Rules []Rule `yaml:"rules"`
 }

-func NewPolicy(r io.Reader, snippetsDirectory string) (*Policy, error) {
+func NewPolicy(r io.Reader, snippetsDirectories ...string) (*Policy, error) {
 	var p Policy
 	p.Networks = make(map[string][]Network)
 	p.Conditions = make(map[string][]string)
 	p.Challenges = make(map[string]Challenge)

-	if snippetsDirectory == "" {
+	if len(snippetsDirectories) == 0 {
 		err := yaml.NewDecoder(r).Decode(&p)
 		if err != nil {
 			return nil, err
 		}
 	} else {
-		err := yaml.NewDecoder(r, yaml.ReferenceDirs(snippetsDirectory)).Decode(&p)
+		var entries []string
+		for _, dir := range snippetsDirectories {
+			if dir == "" {
+				// skip nil directories
+				continue
+			}
+			dirFiles, err := os.ReadDir(dir)
+			if err != nil {
+				return nil, err
+			}
+			for _, file := range dirFiles {
+				if file.IsDir() {
+					continue
+				}
+				entries = append(entries, path.Join(dir, file.Name()))
+			}
+		}
+
+		err := yaml.NewDecoder(r, yaml.ReferenceFiles(entries...)).Decode(&p)
 		if err != nil {
 			return nil, err
 		}

 		// add specific entries from snippets
-		entries, err := os.ReadDir(snippetsDirectory)
-		if err != nil {
-			return nil, err
-		}
 		for _, entry := range entries {
 			var entryPolicy Policy
-			if !entry.IsDir() {
-				entryData, err := os.ReadFile(path.Join(snippetsDirectory, entry.Name()))
-				if err != nil {
-					return nil, err
-				}
-				err = yaml.NewDecoder(bytes.NewReader(entryData), yaml.ReferenceDirs(snippetsDirectory)).Decode(&entryPolicy)
-				if err != nil {
-					return nil, err
-				}
+			entryData, err := os.ReadFile(entry)
+			if err != nil {
+				return nil, err
+			}
+			err = yaml.NewDecoder(bytes.NewReader(entryData), yaml.ReferenceFiles(entries...)).Decode(&entryPolicy)
+			if err != nil {
+				return nil, err
+			}

-				// add networks / conditions / challenges definitions if they don't exist already
+			// add networks / conditions / challenges definitions if they don't exist already

-				for k, v := range entryPolicy.Networks {
-					// add network if policy entry does not exist
-					_, ok := p.Networks[k]
-					if !ok {
-						p.Networks[k] = v
-					}
+			for k, v := range entryPolicy.Networks {
+				// add network if policy entry does not exist
+				_, ok := p.Networks[k]
+				if !ok {
+					p.Networks[k] = v
 				}
+			}

-				for k, v := range entryPolicy.Conditions {
-					// add condition if policy entry does not exist
-					_, ok := p.Conditions[k]
-					if !ok {
-						p.Conditions[k] = v
-					}
+			for k, v := range entryPolicy.Conditions {
+				// add condition if policy entry does not exist
+				_, ok := p.Conditions[k]
+				if !ok {
+					p.Conditions[k] = v
 				}
+			}

-				for k, v := range entryPolicy.Challenges {
-					// add challenge if policy entry does not exist
-					_, ok := p.Challenges[k]
-					if !ok {
-						p.Challenges[k] = v
-					}
+			for k, v := range entryPolicy.Challenges {
+				// add challenge if policy entry does not exist
+				_, ok := p.Challenges[k]
+				if !ok {
+					p.Challenges[k] = v
 				}
-
 			}
 		}
 	}
--- a/lib/policy/state.go
+++ b/lib/policy/state.go
@@ -0,0 +1,19 @@
+package policy
+
+import (
+	"git.gammaspectra.live/git/go-away/utils"
+	"net/http"
+)
+
+type StateSettings struct {
+	Cache           utils.Cache
+	Backends        map[string]http.Handler
+	PrivateKeySeed  []byte
+	MainName        string
+	MainVersion     string
+	BasePath        string
+	ClientIpHeader  string
+	BackendIpHeader string
+
+	ChallengeResponseCode int
+}
--- a/lib/rule.go
+++ b/lib/rule.go
@@ -1,12 +1,12 @@
 package lib

 import (
+	http_cel "codeberg.org/gone/http-cel"
 	"crypto/sha256"
 	"encoding/hex"
 	"fmt"
 	"git.gammaspectra.live/git/go-away/lib/action"
 	"git.gammaspectra.live/git/go-away/lib/challenge"
-	"git.gammaspectra.live/git/go-away/lib/condition"
 	"git.gammaspectra.live/git/go-away/lib/policy"
 	"github.com/google/cel-go/cel"
 	"github.com/google/cel-go/common/types"
@@ -66,12 +66,12 @@ func NewRuleState(state challenge.StateInterface, r policy.Rule, replacer *strin
 			conditions = append(conditions, cond)
 		}

-		ast, err := condition.FromStrings(state.ProgramEnv(), condition.OperatorOr, conditions...)
+		ast, err := http_cel.NewAst(state.ProgramEnv(), http_cel.OperatorOr, conditions...)
 		if err != nil {
 			return RuleState{}, fmt.Errorf("error compiling conditions: %w", err)
 		}

-		program, err := condition.Program(state.ProgramEnv(), ast)
+		program, err := http_cel.ProgramAst(state.ProgramEnv(), ast)
 		if err != nil {
 			return RuleState{}, fmt.Errorf("error compiling program: %w", err)
 		}
@@ -107,6 +107,9 @@ func (rule RuleState) Evaluate(logger *slog.Logger, w http.ResponseWriter, r *ht
 		return false, fmt.Errorf("error: evaluating administrative rule %s/%s: %w", data.Id.String(), rule.Hash, err)
 	} else if out != nil && out.Type() == types.BoolType {
 		if out.Equal(types.True) == types.True {
+			data.State.RuleHit(r, rule.Name, logger)
+
+			data.State.ActionHit(r, rule.Action, logger)
 			next, err = rule.Handler.Handle(lg, w, r, func() http.Handler {
 				r.Header.Set("X-Away-Rule", rule.Name)
 				r.Header.Set("X-Away-Hash", rule.Hash)
@@ -134,7 +137,13 @@ func (rule RuleState) Evaluate(logger *slog.Logger, w http.ResponseWriter, r *ht
 					return next, nil
 				}
 			}
+		} else {
+			data.State.RuleMiss(r, rule.Name, logger)
 		}
+	} else if out != nil {
+		err := fmt.Errorf("return type not Bool, got %s", out.Type().TypeName())
+		lg.Error(err.Error())
+		return false, fmt.Errorf("error: evaluating administrative rule %s/%s: %w", data.Id.String(), rule.Hash, err)
 	}

 	return true, nil
--- a/lib/settings/backend.go
+++ b/lib/settings/backend.go
@@ -0,0 +1,106 @@
+package settings
+
+import (
+	"git.gammaspectra.live/git/go-away/utils"
+	"net/http"
+	"net/http/httputil"
+)
+
+type Backend struct {
+	// URL Target server backend path. Supports http/https/unix protocols.
+	URL string `yaml:"url"`
+
+	// Host Override the Host header and TLS SNI with this value if specified
+	Host string `yaml:"host"`
+
+	//ProxyProtocol uint8 `yaml:"proxy-protocol"`
+
+	// HTTP2Enabled Enable HTTP2 to backend
+	HTTP2Enabled bool `yaml:"http2-enabled"`
+
+	// TLSSkipVerify Disable TLS certificate verification, if any
+	TLSSkipVerify bool `yaml:"tls-skip-verify"`
+
+	// IpHeader HTTP header to set containing the IP header. Set - to forcefully ignore global defaults.
+	IpHeader string `yaml:"ip-header"`
+
+	// GoDNS Resolve URL using the Go DNS server
+	// Only relevant when running with CGO enabled
+	GoDNS bool `yaml:"go-dns"`
+}
+
+func (b Backend) Create() (*httputil.ReverseProxy, error) {
+	if b.IpHeader == "-" {
+		b.IpHeader = ""
+	}
+
+	proxy, err := utils.MakeReverseProxy(b.URL, b.GoDNS)
+	if err != nil {
+		return nil, err
+	}
+
+	transport := proxy.Transport.(*http.Transport)
+
+	if b.HTTP2Enabled {
+		transport.ForceAttemptHTTP2 = true
+	}
+
+	if b.TLSSkipVerify {
+		transport.TLSClientConfig.InsecureSkipVerify = true
+	}
+
+	if b.Host != "" {
+		transport.TLSClientConfig.ServerName = b.Host
+	}
+
+	if b.IpHeader != "" || b.Host != "" {
+		director := proxy.Director
+		proxy.Director = func(req *http.Request) {
+			if b.IpHeader != "" {
+				if ip := utils.GetRemoteAddress(req.Context()); ip != nil {
+					req.Header.Set(b.IpHeader, ip.Addr().Unmap().String())
+				}
+			}
+			if b.Host != "" {
+				req.Host = b.Host
+			}
+			director(req)
+		}
+	}
+
+	/*if b.ProxyProtocol > 0 {
+		dialContext := transport.DialContext
+		if dialContext == nil {
+			dialContext = (&net.Dialer{}).DialContext
+		}
+		transport.DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
+			conn, err := dialContext(ctx, network, addr)
+			if err != nil {
+				return nil, err
+			}
+			addrPort := utils.GetRemoteAddress(ctx)
+			if addrPort == nil {
+				// pass as is
+				hdr := proxyproto.HeaderProxyFromAddrs(b.ProxyProtocol, conn.LocalAddr(), conn.RemoteAddr())
+				_, err = hdr.WriteTo(conn)
+				if err != nil {
+					conn.Close()
+					return nil, err
+				}
+			} else {
+				// set proper headers!
+				hdr := proxyproto.HeaderProxyFromAddrs(b.ProxyProtocol, net.TCPAddrFromAddrPort(*addrPort), conn.RemoteAddr())
+				_, err = hdr.WriteTo(conn)
+				if err != nil {
+					conn.Close()
+					return nil, err
+				}
+			}
+			return conn, nil
+		}
+	}*/
+
+	proxy.Transport = transport
+
+	return proxy, nil
+}
--- a/lib/settings/bind.go
+++ b/lib/settings/bind.go
@@ -0,0 +1,168 @@
+package settings
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"git.gammaspectra.live/git/go-away/utils"
+	"github.com/pires/go-proxyproto"
+	"golang.org/x/crypto/acme"
+	"golang.org/x/crypto/acme/autocert"
+	"log/slog"
+	"net"
+	"net/http"
+	"os"
+	"strconv"
+	"sync/atomic"
+)
+
+type Bind struct {
+	Address    string `yaml:"address"`
+	Network    string `yaml:"network"`
+	SocketMode string `yaml:"socket-mode"`
+	Proxy      bool   `yaml:"proxy"`
+
+	Passthrough bool `yaml:"passthrough"`
+
+	// TLSAcmeAutoCert URL to ACME directory, or letsencrypt
+	TLSAcmeAutoCert string `yaml:"tls-acme-autocert"`
+
+	// TLSCertificate Alternate to TLSAcmeAutoCert
+	TLSCertificate string `yaml:"tls-certificate"`
+	// TLSPrivateKey Alternate to TLSAcmeAutoCert
+	TLSPrivateKey string `yaml:"tls-key"`
+}
+
+func (b *Bind) Listener() (net.Listener, string) {
+	return setupListener(b.Network, b.Address, b.SocketMode, b.Proxy)
+}
+
+func (b *Bind) Server(backends map[string]http.Handler, acmeCachePath string) (*http.Server, func(http.Handler), error) {
+
+	var tlsConfig *tls.Config
+
+	if b.TLSAcmeAutoCert != "" {
+		switch b.TLSAcmeAutoCert {
+		case "letsencrypt":
+			b.TLSAcmeAutoCert = acme.LetsEncryptURL
+		}
+
+		acmeManager := newACMEManager(b.TLSAcmeAutoCert, backends)
+		if acmeCachePath != "" {
+			err := os.MkdirAll(acmeCachePath, 0755)
+			if err != nil {
+				return nil, nil, fmt.Errorf("failed to create acme cache directory: %w", err)
+			}
+			acmeManager.Cache = autocert.DirCache(acmeCachePath)
+		}
+		slog.Warn(
+			"acme-autocert enabled",
+			"directory", b.TLSAcmeAutoCert,
+		)
+		tlsConfig = acmeManager.TLSConfig()
+	} else if b.TLSCertificate != "" && b.TLSPrivateKey != "" {
+		tlsConfig = &tls.Config{}
+		var err error
+		tlsConfig.Certificates = make([]tls.Certificate, 1)
+		tlsConfig.Certificates[0], err = tls.LoadX509KeyPair(b.TLSCertificate, b.TLSPrivateKey)
+		if err != nil {
+			return nil, nil, err
+		}
+		slog.Warn(
+			"TLS enabled",
+			"certificate", b.TLSCertificate,
+		)
+	}
+
+	var serverHandler atomic.Pointer[http.Handler]
+	server := utils.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if handler := serverHandler.Load(); handler == nil {
+			http.Error(w, http.StatusText(http.StatusBadGateway), http.StatusBadGateway)
+		} else {
+			(*handler).ServeHTTP(w, r)
+		}
+	}), tlsConfig)
+
+	swap := func(handler http.Handler) {
+		serverHandler.Store(&handler)
+	}
+
+	if b.Passthrough {
+		// setup a passthrough handler temporarily
+		swap(http.Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			backend := utils.SelectHTTPHandler(backends, r.Host)
+			if backend == nil {
+				http.Error(w, http.StatusText(http.StatusBadGateway), http.StatusBadGateway)
+			} else {
+				backend.ServeHTTP(w, r)
+			}
+		})))
+	}
+
+	return server, swap, nil
+
+}
+
+func setupListener(network, address, socketMode string, proxy bool) (net.Listener, string) {
+	if network == "proxy" {
+		network = "tcp"
+		proxy = true
+	}
+
+	formattedAddress := ""
+	switch network {
+	case "unix":
+		formattedAddress = "unix:" + address
+	case "tcp":
+		formattedAddress = "http://localhost" + address
+	default:
+		formattedAddress = fmt.Sprintf(`(%s) %s`, network, address)
+	}
+
+	listener, err := net.Listen(network, address)
+	if err != nil {
+		panic(fmt.Errorf("failed to bind to %s: %w", formattedAddress, err))
+	}
+
+	// additional permission handling for unix sockets
+	if network == "unix" {
+		mode, err := strconv.ParseUint(socketMode, 8, 0)
+		if err != nil {
+			listener.Close()
+			panic(fmt.Errorf("could not parse socket mode %s: %w", socketMode, err))
+		}
+
+		err = os.Chmod(address, os.FileMode(mode))
+		if err != nil {
+			listener.Close()
+			panic(fmt.Errorf("could not change socket mode: %w", err))
+		}
+	}
+
+	if proxy {
+		slog.Warn("listener PROXY enabled")
+		formattedAddress += " +PROXY"
+		listener = &proxyproto.Listener{
+			Listener: listener,
+		}
+	}
+
+	return listener, formattedAddress
+}
+
+func newACMEManager(clientDirectory string, backends map[string]http.Handler) *autocert.Manager {
+	manager := &autocert.Manager{
+		Prompt: autocert.AcceptTOS,
+		HostPolicy: autocert.HostPolicy(func(ctx context.Context, host string) error {
+			if utils.SelectHTTPHandler(backends, host) != nil {
+				return nil
+			}
+			return fmt.Errorf("acme/autocert: host %s not configured in backends", host)
+		}),
+		Client: &acme.Client{
+			HTTPClient:   http.DefaultClient,
+			DirectoryURL: clientDirectory,
+		},
+	}
+	return manager
+}
--- a/lib/settings/settings.go
+++ b/lib/settings/settings.go
@@ -0,0 +1,49 @@
+package settings
+
+import "maps"
+
+type Settings struct {
+	Bind Bind `yaml:"bind"`
+
+	Backends map[string]Backend `yaml:"backends"`
+
+	BindDebug   string `yaml:"bind-debug"`
+	BindMetrics string `yaml:"bind-metrics"`
+
+	Strings Strings `yaml:"strings"`
+
+	// Links to add to challenge/error pages like privacy/impressum.
+	Links []Link `yaml:"links"`
+
+	ChallengeTemplate string `yaml:"challenge-template"`
+
+	// ChallengeTemplateOverrides Key/Value overrides for the current chosen template
+	ChallengeTemplateOverrides map[string]string `yaml:"challenge-template-overrides"`
+}
+
+type Link struct {
+	Name string `yaml:"name"`
+	URL  string `yaml:"url"`
+}
+
+var DefaultSettings = Settings{
+	Strings:           DefaultStrings,
+	ChallengeTemplate: "anubis",
+	ChallengeTemplateOverrides: func() map[string]string {
+		m := make(map[string]string)
+		maps.Copy(m, map[string]string{
+			"Theme": "",
+			"Logo":  "",
+		})
+		return m
+	}(),
+
+	Bind: Bind{
+		Address:         ":8080",
+		Network:         "tcp",
+		SocketMode:      "0770",
+		Proxy:           false,
+		TLSAcmeAutoCert: "",
+	},
+	Backends: make(map[string]Backend),
+}
--- a/lib/settings/strings.go
+++ b/lib/settings/strings.go
@@ -0,0 +1,55 @@
+package settings
+
+import (
+	"html/template"
+	"maps"
+)
+
+type Strings map[string]string
+
+var DefaultStrings = make(Strings).set(map[string]string{
+	"title_challenge": "Checking you are not a bot",
+	"title_error":     "Oh no!",
+
+	"noscript_warning": "<p>Sadly, you may need to enable JavaScript to get past this challenge. This is required because AI companies have changed the social contract around how website hosting works.</p>",
+
+	"details_title": "Why am I seeing this?",
+	"details_text": `
+<p>
+	You are seeing this because the administrator of this website has set up <a href="https://git.gammaspectra.live/git/go-away">go-away</a> 
+	to protect the server against the scourge of <a href="https://thelibre.news/foss-infrastructure-is-under-attack-by-ai-companies/">AI companies aggressively scraping websites</a>.
+</p>
+<p>
+	Mass scraping can and does cause downtime for the websites, which makes their resources inaccessible for everyone.
+</p>
+<p>
+	Please note that some challenges requires the use of modern JavaScript features and some plugins may disable these.
+	Disable such plugins for this domain (for example, JShelter) if you encounter any issues.
+</p>
+`,
+	"details_contact_admin_with_request_id": "If you have any issues contact the site administrator and provide the following Request Id",
+
+	"button_refresh_page": "Refresh page",
+
+	"status_loading_challenge":   "Loading challenge",
+	"status_starting_challenge":  "Starting challenge",
+	"status_loading":             "Loading...",
+	"status_calculating":         "Calculating...",
+	"status_challenge_success":   "Challenge success!",
+	"status_challenge_done_took": "Done! Took",
+	"status_error":               "Error:",
+})
+
+func (s Strings) set(v map[string]string) Strings {
+	maps.Copy(s, v)
+	return s
+}
+
+func (s Strings) Get(value string) template.HTML {
+	v, ok := (s)[value]
+	if !ok {
+		// fallback
+		return template.HTML("string:" + value)
+	}
+	return template.HTML(v)
+}
--- a/lib/state.go
+++ b/lib/state.go
@@ -1,13 +1,14 @@
 package lib

 import (
+	http_cel "codeberg.org/gone/http-cel"
 	"crypto/ed25519"
 	"crypto/rand"
 	"encoding/json"
 	"fmt"
 	"git.gammaspectra.live/git/go-away/lib/challenge"
-	"git.gammaspectra.live/git/go-away/lib/condition"
 	"git.gammaspectra.live/git/go-away/lib/policy"
+	"git.gammaspectra.live/git/go-away/lib/settings"
 	"git.gammaspectra.live/git/go-away/utils"
 	"github.com/google/cel-go/cel"
 	"github.com/yl2chen/cidranger"
@@ -31,7 +32,8 @@ type State struct {
 	publicKey  ed25519.PublicKey
 	privateKey ed25519.PrivateKey

-	settings policy.Settings
+	opt      settings.Settings
+	settings policy.StateSettings

 	networks map[string]cidranger.Ranger

@@ -44,10 +46,12 @@ type State struct {
 	Mux *http.ServeMux
 }

-func NewState(p policy.Policy, settings policy.Settings) (handler http.Handler, err error) {
+func NewState(p policy.Policy, opt settings.Settings, settings policy.StateSettings) (handler http.Handler, err error) {
 	state := new(State)
 	state.close = make(chan struct{})
 	state.settings = settings
+	state.opt = opt
+	metrics.Reset()
 	state.client = &http.Client{
 		CheckRedirect: func(req *http.Request, via []*http.Request) error {
 			return http.ErrUseLastResponse
@@ -58,7 +62,7 @@ func NewState(p policy.Policy, settings policy.Settings) (handler http.Handler,
 		return nil, fmt.Errorf("failed to initialize RADb client: %w", err)
 	}

-	state.urlPath = "/.well-known/." + state.Settings().PackageName
+	state.urlPath = state.Settings().BasePath

 	// set a reasonable configuration for default http proxy if there is none
 	for _, backend := range state.Settings().Backends {
@@ -89,22 +93,18 @@ func NewState(p policy.Policy, settings policy.Settings) (handler http.Handler,
 		}
 	}

-	if state.Settings().ChallengeTemplate == "" {
-		state.settings.ChallengeTemplate = "anubis"
-	}
+	if templates["challenge-"+state.Options().ChallengeTemplate+".gohtml"] == nil {

-	if templates["challenge-"+state.Settings().ChallengeTemplate+".gohtml"] == nil {
-
-		if data, err := os.ReadFile(state.Settings().ChallengeTemplate); err == nil && len(data) > 0 {
-			name := path.Base(state.Settings().ChallengeTemplate)
+		if data, err := os.ReadFile(state.Options().ChallengeTemplate); err == nil && len(data) > 0 {
+			name := path.Base(state.Options().ChallengeTemplate)
 			err := initTemplate(name, string(data))
 			if err != nil {
-				return nil, fmt.Errorf("error loading template %s: %w", settings.ChallengeTemplate, err)
+				return nil, fmt.Errorf("error loading template %s: %w", state.Options().ChallengeTemplate, err)
 			}
-			state.settings.ChallengeTemplate = name
+			state.opt.ChallengeTemplate = name
 		}

-		return nil, fmt.Errorf("no template defined for %s", settings.ChallengeTemplate)
+		return nil, fmt.Errorf("no template defined for %s", state.Options().ChallengeTemplate)
 	}

 	state.networks = make(map[string]cidranger.Ranger)
@@ -189,7 +189,7 @@ func NewState(p policy.Policy, settings policy.Settings) (handler http.Handler,

 	var replacements []string
 	for k, entries := range p.Conditions {
-		ast, err := condition.FromStrings(state.programEnv, condition.OperatorOr, entries...)
+		ast, err := http_cel.NewAst(state.programEnv, http_cel.OperatorOr, entries...)
 		if err != nil {
 			return nil, fmt.Errorf("conditions %s: error compiling conditions: %v", k, err)
 		}
@@ -215,7 +215,6 @@ func NewState(p policy.Policy, settings policy.Settings) (handler http.Handler,
 	}

 	for _, r := range p.Rules {
-
 		rule, err := NewRuleState(state, r, conditionReplacer, nil)
 		if err != nil {
 			return nil, fmt.Errorf("rule %s: %w", r.Name, err)
--- a/lib/template.go
+++ b/lib/template.go
@@ -0,0 +1,114 @@
+package lib
+
+import (
+	"bytes"
+	"git.gammaspectra.live/git/go-away/embed"
+	"git.gammaspectra.live/git/go-away/lib/challenge"
+	"git.gammaspectra.live/git/go-away/utils"
+	"html/template"
+	"maps"
+	"net/http"
+)
+
+var templates map[string]*template.Template
+
+func init() {
+
+	templates = make(map[string]*template.Template)
+
+	dir, err := embed.TemplatesFs.ReadDir(".")
+	if err != nil {
+		panic(err)
+	}
+	for _, e := range dir {
+		if e.IsDir() {
+			continue
+		}
+		data, err := embed.TemplatesFs.ReadFile(e.Name())
+		if err != nil {
+			panic(err)
+		}
+		err = initTemplate(e.Name(), string(data))
+		if err != nil {
+			panic(err)
+		}
+	}
+}
+
+func initTemplate(name, data string) error {
+	tpl := template.New(name)
+	_, err := tpl.Parse(data)
+	if err != nil {
+		return err
+	}
+	templates[name] = tpl
+	return nil
+}
+
+func (state *State) ChallengePage(w http.ResponseWriter, r *http.Request, status int, reg *challenge.Registration, params map[string]any) {
+	data := challenge.RequestDataFromContext(r.Context())
+	input := make(map[string]any)
+	input["Id"] = data.Id.String()
+	input["Random"] = utils.CacheBust()
+
+	input["Path"] = state.UrlPath()
+	input["Links"] = state.Options().Links
+	input["Strings"] = state.Options().Strings
+	for k, v := range state.Options().ChallengeTemplateOverrides {
+		input[k] = v
+	}
+
+	if reg != nil {
+		input["Challenge"] = reg.Name
+	}
+
+	maps.Copy(input, params)
+
+	if _, ok := input["Title"]; !ok {
+		input["Title"] = state.Options().Strings.Get("title_challenge")
+	}
+
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+
+	buf := bytes.NewBuffer(make([]byte, 0, 8192))
+
+	err := templates["challenge-"+state.Options().ChallengeTemplate+".gohtml"].Execute(buf, input)
+	if err != nil {
+		state.ErrorPage(w, r, http.StatusInternalServerError, err, "")
+	} else {
+		w.WriteHeader(status)
+		_, _ = w.Write(buf.Bytes())
+	}
+}
+
+func (state *State) ErrorPage(w http.ResponseWriter, r *http.Request, status int, err error, redirect string) {
+	data := challenge.RequestDataFromContext(r.Context())
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+
+	buf := bytes.NewBuffer(make([]byte, 0, 8192))
+
+	input := map[string]any{
+		"Id":        data.Id.String(),
+		"Random":    utils.CacheBust(),
+		"Error":     err.Error(),
+		"Path":      state.UrlPath(),
+		"Theme":     "",
+		"Title":     template.HTML(string(state.Options().Strings.Get("title_error")) + " " + http.StatusText(status)),
+		"Challenge": "",
+		"Redirect":  redirect,
+		"Links":     state.Options().Links,
+		"Strings":   state.Options().Strings,
+	}
+	for k, v := range state.Options().ChallengeTemplateOverrides {
+		input[k] = v
+	}
+
+	err2 := templates["challenge-"+state.Options().ChallengeTemplate+".gohtml"].Execute(buf, input)
+	if err2 != nil {
+		// nested errors!
+		panic(err2)
+	} else {
+		w.WriteHeader(status)
+		_, _ = w.Write(buf.Bytes())
+	}
+}
--- a/utils/http.go
+++ b/utils/http.go
@@ -10,6 +10,7 @@ import (
 	"net"
 	"net/http"
 	"net/http/httputil"
+	"net/netip"
 	"net/url"
 	"strings"
 )
@@ -68,13 +69,14 @@ func EnsureNoOpenRedirect(redirect string) (string, error) {
 	return uri.String(), nil
 }

-func MakeReverseProxy(target string) (*httputil.ReverseProxy, error) {
+func MakeReverseProxy(target string, goDns bool) (*httputil.ReverseProxy, error) {
 	u, err := url.Parse(target)
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse target URL: %w", err)
 	}

 	transport := http.DefaultTransport.(*http.Transport).Clone()
+	transport.TLSClientConfig = &tls.Config{}

 	// https://github.com/oauth2-proxy/oauth2-proxy/blob/4e2100a2879ef06aea1411790327019c1a09217c/pkg/upstream/http.go#L124
 	if u.Scheme == "unix" {
@@ -88,9 +90,17 @@ func MakeReverseProxy(target string) (*httputil.ReverseProxy, error) {
 		}
 		// tell transport how to handle the unix url scheme
 		transport.RegisterProtocol("unix", UnixRoundTripper{Transport: transport})
+	} else if goDns {
+		dialer := &net.Dialer{
+			Resolver: &net.Resolver{
+				PreferGo: true,
+			},
+		}
+		transport.DialContext = dialer.DialContext
 	}

 	rp := httputil.NewSingleHostReverseProxy(u)
+
 	rp.Transport = transport

 	return rp, nil
@@ -108,22 +118,44 @@ func GetRequestScheme(r *http.Request) string {
 	return "http"
 }

-func GetRequestAddress(r *http.Request, clientHeader string) net.IP {
-	var ipStr string
+func GetRequestAddress(r *http.Request, clientHeader string) netip.AddrPort {
+	strVal := r.RemoteAddr
+
 	if clientHeader != "" {
-		ipStr = r.Header.Get(clientHeader)
+		strVal = r.Header.Get(clientHeader)
 	}
-	if ipStr != "" {
+	if strVal != "" {
 		// handle X-Forwarded-For
-		ipStr = strings.Split(ipStr, ",")[0]
+		strVal = strings.Split(strVal, ",")[0]
 	}

 	// fallback
-	if ipStr == "" {
-		ipStr, _, _ = net.SplitHostPort(r.RemoteAddr)
+	if strVal == "" {
+		strVal = r.RemoteAddr
 	}
-	ipStr = strings.Trim(ipStr, "[]")
-	return net.ParseIP(ipStr)
+
+	addrPort, err := netip.ParseAddrPort(strVal)
+	if err != nil {
+		addr, err2 := netip.ParseAddr(strVal)
+		if err2 != nil {
+			return netip.AddrPort{}
+		}
+		addrPort = netip.AddrPortFrom(addr, 0)
+	}
+	return addrPort
+}
+
+type remoteAddress struct{}
+
+func SetRemoteAddress(r *http.Request, addrPort netip.AddrPort) *http.Request {
+	return r.WithContext(context.WithValue(r.Context(), remoteAddress{}, addrPort))
+}
+func GetRemoteAddress(ctx context.Context) *netip.AddrPort {
+	ip, ok := ctx.Value(remoteAddress{}).(netip.AddrPort)
+	if !ok {
+		return nil
+	}
+	return &ip
 }

 func CacheBust() string {
Author	SHA1	Message	Date
WeebDataHoarder	0473109e60	http: allow specifying Go DNS resolver on config backends	2025-04-27 13:16:42 +02:00
WeebDataHoarder	eb96acb559	cmd: have -check use same logger as fatal errors	2025-04-27 12:18:49 +02:00
WeebDataHoarder	c33531d7eb	cmd: log errors with ERROR severity via slog, additionally print newline string, fixes #12	2025-04-27 12:17:18 +02:00
WeebDataHoarder	b3eb0ab4b7	docker: remove GOAWAY_POLICY_SNIPPETS by default	2025-04-27 11:51:17 +02:00
WeebDataHoarder	45692ec6c0	readme: use proper forge for powxy	2025-04-26 00:03:43 +02:00
WeebDataHoarder	32b7c578f6	readme: add CSSWAF, rewrite table	2025-04-25 23:56:29 +02:00
WeebDataHoarder	01ef63abea	challenge: quote expected challenge name on error	2025-04-25 23:20:53 +02:00
WeebDataHoarder	0b9f077b6c	context: delete query parameters set by go-away	2025-04-25 22:48:34 +02:00
WeebDataHoarder	a85aa95dbd	cmd: support changing path from well-known prefix, allow configuring full path	2025-04-25 22:16:09 +02:00
WeebDataHoarder	a1f97adde8	metrics: fix global state reset on policy reload	2025-04-25 22:11:08 +02:00
WeebDataHoarder	bca5b25f28	docker: include default snippets onto Dockerfile, allow multiple snippets folders, closes #8	2025-04-25 18:09:25 +02:00
WeebDataHoarder	d665036d98	examples: move desired-crawlers before undesired-networks	2025-04-25 17:59:16 +02:00
WeebDataHoarder	9300132a4b	readme: mark string support and https listeners off todo list	2025-04-25 17:52:32 +02:00
WeebDataHoarder	9ebb78f09f	readme: note support for string editing under templates	2025-04-25 17:35:22 +02:00
WeebDataHoarder	398675aa3c	config: Add string replacement for templates, add example config.yml (close #10 )	2025-04-25 17:32:45 +02:00
WeebDataHoarder	01df790e30	docker: added config/metrics/debug options	2025-04-25 13:07:34 +02:00
WeebDataHoarder	13c0c5473e	ci/readme: update Codeberg mirror path	2025-04-25 12:18:29 +02:00
WeebDataHoarder	4d7436c51b	cel: use generic env from https://codeberg.org/gone/http-cel	2025-04-25 12:08:55 +02:00
WeebDataHoarder	bc0eaeca21	metrics: Add rule action metrics	2025-04-25 11:40:39 +02:00
WeebDataHoarder	d6d69d0192	metrics: track DEFAULT rule hit	2025-04-25 11:40:38 +02:00
WeebDataHoarder	47f9f6fee6	metrics: Added prometheus metrics for rules and challenges	2025-04-25 11:27:42 +02:00
Alan Orth	6f3d81618c	examples: add TikTokSpider Requests using this user agent are coming from the same Amazon net- works as Bytespider.	2025-04-25 11:02:48 +03:00
WeebDataHoarder	1f84f5e981	examples: forgejo: Add branches/tags listing on repo to API endpoints	2025-04-24 20:51:15 +02:00
WeebDataHoarder	1e569571a0	readme: cleanup other project forge icons	2025-04-24 18:34:25 +02:00
WeebDataHoarder	ef89de8914	readme: Added https://git.sequentialread.com/forest/pow-bot-deterrent to other projects	2025-04-24 18:26:06 +02:00
WeebDataHoarder	9541c58eeb	settings: introduce settings YAML file to complement cmd arguments	2025-04-24 18:26:06 +02:00
Alan Orth	fc7d67ad70	Add examples/snippets/bot-uptimerobot.yml Add network prefixes and user agent for UptimeRobot. Source: https://uptimerobot.com/help/locations/	2025-04-24 13:39:33 +03:00
WeebDataHoarder	96870cc192	dnsbl: normal error handling on resolution error	2025-04-24 00:02:06 +02:00