initial release

2025-10-05 13:32:48 +01:00
parent 7c9c591f8f
commit 7a77645510
6 changed files with 198 additions and 0 deletions
--- a/custom-init/10-torify-wg0.sh
+++ b/custom-init/10-torify-wg0.sh
@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Wait for WireGuard to be up
+for i in {1..30}; do
+  ip link show wg0 >/dev/null 2>&1 && break
+  sleep 1
+done
+
+# Tor transparent proxy ports (from torrc)
+TOR_TRANS=9040
+TOR_DNS=5353
+
+# Allow WG UDP
+iptables -C INPUT -p udp --dport 51820 -j ACCEPT || iptables -A INPUT -p udp --dport 51820 -j ACCEPT
+# Loopback + established (idempotent-ish)
+iptables -C INPUT -i lo -j ACCEPT || iptables -A INPUT -i lo -j ACCEPT
+iptables -C OUTPUT -o lo -j ACCEPT || iptables -A OUTPUT -o lo -j ACCEPT
+iptables -C INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT || iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
+iptables -C OUTPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT || iptables -A OUTPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
+
+# === Transparent redirection of wg0 traffic into Tor ===
+# DNS to Tor DNSPort (UDP + TCP)
+iptables -t nat -C PREROUTING -i wg0 -p udp --dport 53 -j REDIRECT --to-ports ${TOR_DNS} \
+  || iptables -t nat -A PREROUTING -i wg0 -p udp --dport 53 -j REDIRECT --to-ports ${TOR_DNS}
+iptables -t nat -C PREROUTING -i wg0 -p tcp --dport 53 -j REDIRECT --to-ports ${TOR_DNS} \
+  || iptables -t nat -A PREROUTING -i wg0 -p tcp --dport 53 -j REDIRECT --to-ports ${TOR_DNS}
+
+# All TCP to Tor TransPort
+iptables -t nat -C PREROUTING -i wg0 -p tcp -j REDIRECT --to-ports ${TOR_TRANS} \
+  || iptables -t nat -A PREROUTING -i wg0 -p tcp -j REDIRECT --to-ports ${TOR_TRANS}
+
+# Fail closed: block anything from wg0 that didn't get redirected
+iptables -C FORWARD -o wg0 -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT \
+  || iptables -I FORWARD 1 -o wg0 -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
+iptables -C FORWARD -i wg0 -p udp -j REJECT --reject-with icmp-port-unreachable \
+  || iptables -I FORWARD 2 -i wg0 -p udp -j REJECT --reject-with icmp-port-unreachable
+iptables -C FORWARD -i wg0 -p icmp -j REJECT --reject-with icmp-host-unreachable \
+  || iptables -I FORWARD 3 -i wg0 -p icmp -j REJECT --reject-with icmp-host-unreachable
+iptables -C FORWARD -i wg0 -j DROP || iptables -I FORWARD 4 -i wg0 -j DROP
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -0,0 +1,42 @@
+version: "3.9"
+
+services:
+  wireguard:
+    image: lscr.io/linuxserver/wireguard:latest
+    container_name: wg-gateway
+    restart: unless-stopped
+    cap_add:
+      - NET_ADMIN
+      - SYS_MODULE
+    ports:
+      - "51820:51820/udp"
+    environment:
+      - PUID=1000
+      - PGID=1000
+      - TZ=Europe/London
+      # --- Auto-generate server + peers ---
+      - SERVERURL=<your.public.ip.or.domain>   # or "auto" if supported by your env
+      - SERVERPORT=51820
+      - PEERS=phone,ipad,laptop                 # names or a number, e.g. "3"
+      - INTERNAL_SUBNET=10.66.0.0               # /24 is implied by the image
+      - ALLOWEDIPS=0.0.0.0/0                    # road-warrior: route all traffic
+      - PEERDNS=10.66.0.1                       # optional; we force-redirect DNS anyway
+      - LOG_CONFS=true                          # see the generated peer QR codes in logs
+    sysctls:
+      net.ipv4.ip_forward: "1"
+      net.ipv6.conf.all.disable_ipv6: "1"
+      net.ipv4.conf.all.src_valid_mark: "1"
+    volumes:
+      - ./wireguard:/config                     # WireGuard configs live here
+      - /lib/modules:/lib/modules               # helps with kernel modules
+      # our startup script that applies Tor iptables rules inside WG's namespace
+      - ./custom-init:/custom-cont-init.d:ro
+
+  tor:
+    build: ./tor                                # same Dockerfile/torrc from earlier
+    container_name: tor
+    network_mode: "service:wg-gateway"          # share WG’s network namespace
+    depends_on:
+      - wireguard
+    restart: unless-stopped
+
--- a/tor/Dockerfile
+++ b/tor/Dockerfile
@@ -0,0 +1,14 @@
+FROM debian:stable-slim
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends tor iproute2 iptables ca-certificates && \
+    rm -rf /var/lib/apt/lists/*
+
+# Tor data dir
+RUN mkdir -p /var/lib/tor && chown -R debian-tor:debian-tor /var/lib/tor && chmod 700 /var/lib/tor
+
+COPY torrc /etc/tor/torrc
+
+# By default, run tor in foreground
+USER debian-tor
+CMD ["tor", "-f", "/etc/tor/torrc"]
--- a/tor/torrc
+++ b/tor/torrc
@@ -0,0 +1,21 @@
+RunAsDaemon 0
+DataDirectory /var/lib/tor
+
+# We don't expose a SOCKS port; everything is transparently redirected.
+SocksPort 0
+
+# Transparent TCP proxy and DNS for iptables REDIRECT
+TransPort 0.0.0.0:9040
+DNSPort 0.0.0.0:5353
+
+# Virtual addressing so DNS answers get mapped by Tor
+VirtualAddrNetworkIPv4 10.192.0.0/10
+AutomapHostsOnResolve 1
+
+# Reliability/safety
+ClientOnly 1
+AvoidDiskWrites 1
+
+# (Optional) You can pin/avoid exits with these:
+# ExitNodes {us},{nl}
+# StrictNodes 1
--- a/wg/Dockerfile
+++ b/wg/Dockerfile
@@ -0,0 +1,13 @@
+FROM debian:stable-slim
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends wireguard iproute2 iptables bash ca-certificates && \
+    rm -rf /var/lib/apt/lists/*
+
+# WireGuard config will be mounted at runtime
+RUN mkdir -p /etc/wireguard
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]
--- a/wg/entrypoint.sh
+++ b/wg/entrypoint.sh
@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Ensure forwarding is on
+sysctl -w net.ipv4.ip_forward=1 >/dev/null
+
+# Bring up WireGuard. wg0.conf must define Address=10.66.0.1/24 etc.
+ip link add dev wg0 type wireguard || true
+wg-quick up wg0
+
+# Tor transparent proxy ports in THIS namespace (shared with tor service)
+TOR_TRANS=9040
+TOR_DNS=5353
+
+# Flush any old rules
+iptables -t nat -F || true
+iptables -t mangle -F || true
+iptables -F || true
+
+# Default policies
+iptables -P INPUT ACCEPT
+iptables -P FORWARD ACCEPT
+iptables -P OUTPUT ACCEPT
+
+# Allow WireGuard UDP port 51820
+iptables -A INPUT -p udp --dport 51820 -j ACCEPT
+
+# Allow loopback
+iptables -A INPUT -i lo -j ACCEPT
+iptables -A OUTPUT -o lo -j ACCEPT
+
+# Allow established
+iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
+iptables -A OUTPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
+
+# FORWARD: allow from wg0 to local stack (tor) and back
+iptables -A FORWARD -i wg0 -j ACCEPT
+iptables -A FORWARD -o wg0 -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
+
+# === Transparent redirection of wg0 traffic into Tor ===
+
+# DNS: redirect all DNS from wg clients to Tor DNSPort (supports TCP & UDP)
+iptables -t nat -A PREROUTING -i wg0 -p udp --dport 53 -j REDIRECT --to-ports ${TOR_DNS}
+iptables -t nat -A PREROUTING -i wg0 -p tcp --dport 53 -j REDIRECT --to-ports ${TOR_DNS}
+
+# TCP: redirect everything to Tor TransPort
+iptables -t nat -A PREROUTING -i wg0 -p tcp -j REDIRECT --to-ports ${TOR_TRANS}
+
+# Drop any UDP trying to escape (Tor can't carry UDP; better to fail closed)
+iptables -A FORWARD -i wg0 -p udp -j REJECT --reject-with icmp-port-unreachable
+
+# (Optional) prevent bypass: block direct internet from wg0 that is NOT redirected (belt & braces)
+# For non-TCP/UDP, just drop
+iptables -A FORWARD -i wg0 -p icmp -j REJECT --reject-with icmp-host-unreachable
+iptables -A FORWARD -i wg0 -p all -j DROP
+
+# Health: show status then sleep forever
+echo "===== WireGuard status ====="
+wg show
+echo "===== IP addresses ====="
+ip addr
+echo "===== iptables (nat) ====="
+iptables -t nat -S
+echo "===== iptables (filter) ====="
+iptables -S
+
+# Daemonize to keep container alive
+tail -f /dev/null