Add standalone Pi-hole service; move wg-easy's default port off Netbird's

Two independent, requested changes:

- services/pihole.sh: new standalone service, Pi-hole v6 (the image moved
  entirely to a TOML-based /etc/pihole config — the old WEBPASSWORD env var
  and separate /etc/dnsmasq.d volume are both gone; uses
  FTLCONF_webserver_api_password and FTLCONF_dns_listeningMode=ALL
  instead). Deliberately not wired into wg-easy or any other VPN — a device
  has to be pointed at it manually (per-device or via router DHCP). DNS
  itself (53/tcp+udp) is never scanned/moved since shifting it off the
  standard port would defeat the point; a port_in_use check warns instead
  of blocking, since the common case (systemd-resolved on 127.0.0.53 only)
  doesn't actually collide with Pi-hole binding the host's real interfaces.
  Web admin UI is Caddy-fronted like everything else in this repo. Added to
  the README services table.

- services/wg-easy.sh: default VPN/web ports moved from 51820/51821 to
  51830/51831. Netbird's own WireGuard listener also defaults to exactly
  51820 — installing both on one box means wg-easy's existing scan-and-move
  logic would silently shift its port every time, which is harder to
  predict/document than just not starting on the collision in the first
  place. The scan itself is unchanged and still moves both ports further if
  even the new default is taken.

Tested pihole.sh's full standalone install flow (no-Caddy and
Caddy-present-locally cases) against a mocked environment, validating both
generated docker-compose.yml files with `docker compose config`, and
confirmed the reinstall-mode gate correctly no-ops on a second run in
unattended mode.
This commit is contained in:
Claude
2026-08-15 02:22:16 +00:00
parent 0f9ce0a82b
commit 10b985dc95
3 changed files with 465 additions and 6 deletions
+1 -1
View File
@@ -186,7 +186,7 @@ a ready-to-copy Caddy config snippet to `~/docker/caddy-snippets/`.
|-------|---------|
| `base` | `net-tools`, `ncdu`, `git`, `curl`, `wget`, `htop`, `tree`, `zip`/`unzip`, `ca-certificates`, `gnupg`, `jq`, `rsync`; `glow` (terminal markdown reader, Charm apt repo); Docker CE + Compose plugin; `openssh-server` with GitHub/Launchpad SSH key import, optional password-auth lockdown, and SSH Host aliases; optional NetBird overlay network |
| `homelab` | `caddy`, `crowdsec`, `authelia`, `coturn` (shared TURN/STUN relay — Asterisk, Mattermost Calls, and future WebRTC-capable services all register a dedicated credential against one instance instead of each running its own), `homeassistant`, `asterisk`, `pstn-trunk`, `sms-inbound`, `security-dashboard`, `sunshine`, `vpn-data-mount` (mount existing SMB shares from a NetBird-connected home box — SSH trust bootstrap, then read-only discovery of shares already configured there; never writes to the home box's Samba config; repeatable, pick from any number of a home box's shares in one pass; optional per-share [gocryptfs decrypt layer](#client-side-encryption-for-vpn-data-mount) so the VPS only ever handles ciphertext) |
| `utilities` | `actualbudget`, `ai-gpu`, `ai-stack`, `archivebox`, `beszel` (lightweight server + Docker monitoring — CPU/RAM/disk/network, auto-discovers running containers via the Docker socket; complements Gatus rather than replacing it — Gatus is a black-box HTTP check, Beszel is white-box host/process monitoring), `beszel-agent` (agent-only Beszel install for a remote/homelab box reporting to a hub elsewhere — connects outbound over HTTPS, no VPN/port-forwarding/FQDN needed on that box), `changedetection`, `ddclient`, `filebrowser`, `fmd`, `gatus`, `homebox`, `iopaint`, `joplin`, `koha`, `magicmirror`, `mail-archiver`, `mattermost`, `mealie`, `meshcentral`, `n8n`, `nextcloud`, `ntfy`, `onlyoffice`, `paintplus`, `portainer`, `rustdesk`, `stirling-pdf`, `syncthing`, `traccar`, `unifi`, `uptimekuma`, `vaultwarden`, `watchyourlan`, `watchtower`, `wg-easy`, `wordpress` (multi-site, dedicated MariaDB per site — blogs, business sites, e-commerce via WooCommerce) |
| `utilities` | `actualbudget`, `ai-gpu`, `ai-stack`, `archivebox`, `beszel` (lightweight server + Docker monitoring — CPU/RAM/disk/network, auto-discovers running containers via the Docker socket; complements Gatus rather than replacing it — Gatus is a black-box HTTP check, Beszel is white-box host/process monitoring), `beszel-agent` (agent-only Beszel install for a remote/homelab box reporting to a hub elsewhere — connects outbound over HTTPS, no VPN/port-forwarding/FQDN needed on that box), `changedetection`, `ddclient`, `filebrowser`, `fmd`, `gatus`, `homebox`, `iopaint`, `joplin`, `koha`, `magicmirror`, `mail-archiver`, `mattermost`, `mealie`, `meshcentral`, `n8n`, `nextcloud`, `ntfy`, `onlyoffice`, `paintplus`, `pihole` (standalone DNS ad/tracker blocking — not wired into any VPN's DNS push), `portainer`, `rustdesk`, `stirling-pdf`, `syncthing`, `traccar`, `unifi`, `uptimekuma`, `vaultwarden`, `watchyourlan`, `watchtower`, `wg-easy`, `wordpress` (multi-site, dedicated MariaDB per site — blogs, business sites, e-commerce via WooCommerce) |
| `media` | `arm`, `audiobookshelf`, `calibre-web`, `emby`, `immich`, `jellyfin`, `lyrion` |
| `cameras` | `frigate`, `frigate-audio`, `frigate-notify`, `sky-cam` |
| `gaming` | `drum-rhythm-game`, `js99er`, `kyber-launcher`, `kyber-server`, `minecraft`, `wolf`, `wolf-pair` |
+449
View File
@@ -0,0 +1,449 @@
#!/bin/bash
# services/pihole.sh — Pi-hole network-wide DNS ad/tracker blocking.
# Part of the modular post-install system (sourced by setup.sh).
#
# Can also be run standalone on any machine:
# sudo bash pihole.sh
# (Docker must already be installed when run standalone)
#
# Deliberately standalone — not wired into wg-easy or any other VPN/DNS
# push here. Point a device's DNS settings at this box's IP manually to use
# it. If you want it pushed automatically to VPN clients, that's a
# wg-easy-side change (WG_CONFIG's DNS setting), not something this
# installer does on its own.
# ── Standalone bootstrap ──────────────────────────────────────────────────────
# Detected when the script is executed directly rather than sourced by setup.sh.
# Sets up helpers and globals, then defers execution until after the function
# definition at the bottom of this file.
if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
[[ "$(id -u)" == "0" ]] || { echo "Run with sudo: sudo bash $0"; exit 1; }
_SELF_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
_COMMON="$_SELF_DIR/../lib/common.sh"
if [[ -f "$_COMMON" ]]; then
# Full repo present — use the real helpers (picks up ~/docker/.config too)
# shellcheck source=../lib/common.sh
source "$_COMMON"
else
# One-off copy — inline minimal stubs so the script works without the repo
log_info() { echo -e "\033[0;34m[INFO]\033[0m $*"; }
log_success() { echo -e "\033[0;32m[OK]\033[0m $*"; }
log_warning() { echo -e "\033[1;33m[WARN]\033[0m $*"; }
log_error() { echo -e "\033[0;31m[ERROR]\033[0m $*" >&2; }
require_docker() {
command -v docker &>/dev/null || {
log_error "Docker not found. Install it first:"
log_error " curl -fsSL https://get.docker.com | sudo sh"
return 1
}
docker compose version &>/dev/null || {
log_error "Docker Compose plugin missing:"
log_error " sudo apt-get install -y docker-compose-plugin"
return 1
}
}
ensure_docker_dir_ownership() {
chown -R "$ACTUAL_USER:$ACTUAL_USER" "$@" 2>/dev/null || true
}
generate_password() {
local _len="${1:-32}"
tr -dc 'a-zA-Z0-9' < /dev/urandom | head -c "$_len"
}
port_in_use() {
local _port="$1" _proto="${2:-tcp}"
local _flag="-tlnH"
[ "$_proto" = "udp" ] && _flag="-ulnH"
ss "$_flag" "sport = :${_port}" 2>/dev/null | grep -q .
}
find_free_port() {
local _varname="$1" _port="$2" _proto="${3:-tcp}"
while port_in_use "$_port" "$_proto"; do
_port=$((_port + 1))
done
eval "$_varname='$_port'"
}
# Match common.sh's eval-based pattern so local vars in install_* are set correctly
prompt_text() {
local _q="$1" _def="$2" _var="$3" _r
[[ "${UNATTENDED:-false}" == "true" ]] && { eval "$_var='$_def'"; return; }
read -r -p " $_q " _r
eval "$_var='${_r:-$_def}'"
}
prompt_yn() {
local _q="$1" _def="$2" _var="$3" _r
[[ "${UNATTENDED:-false}" == "true" ]] && { eval "$_var='$_def'"; return; }
read -r -p " $_q " _r
eval "$_var='${_r:-$_def}'"
}
prompt_reinstall_mode() {
local _var="$1" _r
[[ "${UNATTENDED:-false}" == "true" ]] && { eval "$_var='cancel'"; return; }
echo ""
echo " 1) Update — refresh the image only, leave config/data as-is"
echo " 2) Full reinstall — wipe and reconfigure from scratch"
echo " 3) Cancel — leave the existing install untouched"
read -r -p " Choice [3]: " _r
case "$_r" in
1) eval "$_var='update'" ;;
2) eval "$_var='fresh'" ;;
*) eval "$_var='cancel'" ;;
esac
}
configure_caddy_for_service() {
local _name="$1" _upstream="$2" _subdomain="$3" _extra="${4:-}"
local _caddy_dir="$DOCKER_DIR/caddy"
local _caddyfile="$_caddy_dir/Caddyfile"
local _display_port="${_upstream##*:}"
# Determine mode: local Caddy, remote Caddy, or none
local _mode="none"
[[ -d "$_caddy_dir" ]] && _mode="local"
[[ -n "${CADDY_REMOTE_HOST:-}" ]] && [[ "$_mode" != "local" ]] && _mode="remote"
[[ "$_mode" == "none" ]] && {
log_info "Access $_name directly on port $_display_port."
return 0
}
echo ""
local _do_caddy=""
if [[ "$_mode" == "remote" ]]; then
log_info "Remote Caddy configured (${CADDY_REMOTE_HOST})."
log_info "A snippet file will be saved to ~/docker/caddy-snippets/."
fi
read -r -p " Configure Caddy reverse proxy for $_name? [y/N]: " _do_caddy
[[ "${_do_caddy,,}" == "y" ]] || {
log_info "Skipping — access at: http://localhost:$_display_port"
return 0
}
# Domain prompt — pre-fill from SITE_DOMAIN when available
local _default_domain=""
if [[ -n "${SITE_DOMAIN:-}" ]] && [[ "$SITE_DOMAIN" != "example.com" ]]; then
_default_domain="${_subdomain}.${SITE_DOMAIN}"
log_info "Default: $_default_domain"
fi
local _domain=""
read -r -p " Domain [${_default_domain:-required}]: " _domain
_domain="${_domain:-$_default_domain}"
[[ -n "$_domain" ]] || { log_warning "No domain entered — skipping Caddy."; return 0; }
# Build upstream — remote Caddy uses host IP:port, not container name
local _block_upstream="$_upstream"
if [[ "$_mode" == "remote" ]]; then
_block_upstream="${CADDY_REMOTE_HOST}:${_display_port}"
fi
local _site_block
_site_block="$(cat << CBLOCK
# $_name
${_domain} {
reverse_proxy ${_block_upstream}
header {
Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
X-Content-Type-Options "nosniff"
X-Frame-Options "SAMEORIGIN"
Referrer-Policy "strict-origin-when-cross-origin"
}
log {
output file /var/log/caddy/${_domain}.log
format json
}
${_extra}
}
CBLOCK
)"
if [[ "$_mode" == "local" ]]; then
if [[ -f "$_caddyfile" ]]; then
local _bk="$_caddy_dir/Caddyfile.backup.$(date +%Y%m%d-%H%M%S)"
cp "$_caddyfile" "$_bk"
log_info "Backed up Caddyfile to $(basename "$_bk")"
else
touch "$_caddyfile"
fi
if grep -q "^${_domain}" "$_caddyfile" 2>/dev/null; then
log_warning "$_domain already in Caddyfile"
local _ow=""
read -r -p " Overwrite? [y/N]: " _ow
[[ "${_ow,,}" == "y" ]] || { log_info "Keeping existing entry."; return 0; }
sed -i "/^${_domain}/,/^}/d" "$_caddyfile"
fi
printf '%s\n' "$_site_block" >> "$_caddyfile"
log_success "Added $_domain to Caddyfile"
docker exec caddy caddy fmt --overwrite /etc/caddy/Caddyfile 2>/dev/null || true
if docker exec caddy caddy reload --config /etc/caddy/Caddyfile 2>/dev/null; then
log_success "$_name accessible at: https://$_domain"
else
log_warning "Reload failed — check: docker logs caddy"
log_info "Manual reload: docker exec caddy caddy reload --config /etc/caddy/Caddyfile"
fi
else
local _snippet_dir="$DOCKER_DIR/caddy-snippets"
local _snippet_file="$_snippet_dir/${_subdomain}.caddy"
mkdir -p "$_snippet_dir"
printf '%s\n' "$_site_block" > "$_snippet_file"
chown "$ACTUAL_USER:$ACTUAL_USER" "$_snippet_file" 2>/dev/null || true
log_success "Snippet saved: $_snippet_file"
log_info "Copy to Caddy machine:"
log_info " scp $_snippet_file caddy-host:~/caddy-snippets/"
log_info " rsync -av $_snippet_dir/ caddy-host:~/caddy-snippets/ (all at once)"
fi
}
write_readme() {
local _dir="$1"; shift
mkdir -p "$_dir"
cat > "$_dir/README.md"
}
fi
# Globals — ACTUAL_USER/ACTUAL_HOME must come before DOCKER_DIR
# ($HOME under sudo is /root, not the real user's home)
ACTUAL_USER="${ACTUAL_USER:-${SUDO_USER:-$USER}}"
ACTUAL_HOME="$(getent passwd "$ACTUAL_USER" 2>/dev/null | cut -d: -f6 || echo "${HOME:-/root}")"
DOCKER_DIR="${DOCKER_DIR:-$ACTUAL_HOME/docker}"
DRY_RUN="${DRY_RUN:-false}"
UNATTENDED="${UNATTENDED:-false}"
SITE_TZ="${SITE_TZ:-$(cat /etc/timezone 2>/dev/null || echo UTC)}"
SITE_DOMAIN="${SITE_DOMAIN:-example.com}"
SITE_CADDY_NET="${SITE_CADDY_NET:-caddy_net}"
register_service() { :; } # no-op — no wizard to register into
_RUN_STANDALONE=1
fi
# ─────────────────────────────────────────────────────────────────────────────
register_service pihole utilities "Network-wide DNS ad/tracker blocking (Pi-hole) — standalone, not wired into any VPN" 80
install_pihole() {
require_docker || return 1
local DIR="$DOCKER_DIR/pihole"
local WEB_PORT="8081"
if [ "$DRY_RUN" = true ]; then
echo "[DRY-RUN] Would create $DIR with docker-compose.yml + .env"
echo "[DRY-RUN] Would warn (not block) if port 53/tcp or 53/udp is already in use"
echo "[DRY-RUN] Would auto-scan for a free host port for the web admin UI"
echo "[DRY-RUN] Would generate a random admin password"
echo "[DRY-RUN] Would offer a Caddy reverse proxy for the admin UI only (never DNS)"
return 0
fi
if [[ -f "$DIR/docker-compose.yml" && -f "$DIR/.env" ]]; then
local MODE=""
prompt_reinstall_mode MODE
case "$MODE" in
update)
log_info "Refreshing the Pi-hole image only — existing blocklists, config, and"
log_info "port are left as-is."
( cd "$DIR" && docker compose pull && docker compose up -d ) \
&& log_success "Pi-hole image refreshed" \
|| log_warning "Refresh failed — check: docker compose -f $DIR/docker-compose.yml logs"
return 0
;;
cancel)
log_info "Leaving the existing install as-is."
return 0
;;
fresh) ;; # fall through to the full install flow below
esac
fi
# DNS itself is never scanned/moved — shifting Pi-hole off port 53 would
# defeat the point, since every device on the network expects to find DNS
# there by convention (unlike a web UI port, nothing lets a client be told
# "try a different port instead"). Warn instead: the common case on Ubuntu
# is systemd-resolved bound only to 127.0.0.53:53 (loopback), which does
# NOT collide with Pi-hole's container publishing 53 on the host's real
# interfaces — but if something else really is bound to 0.0.0.0:53, this
# says so up front instead of failing silently at `docker compose up`.
if port_in_use 53 tcp || port_in_use 53 udp; then
log_warning "Something is already listening on port 53 (DNS) — check with:"
log_warning " ss -tulnp | grep ':53 '"
log_warning "If that's systemd-resolved bound to 127.0.0.53 only, this is fine —"
log_warning "Pi-hole binds the host's real interfaces, not the loopback stub. If"
log_warning "it's something else bound to 0.0.0.0:53, Pi-hole's container won't"
log_warning "be able to start until that's freed or reconfigured."
fi
find_free_port WEB_PORT "$WEB_PORT"
mkdir -p "$DIR"
ensure_docker_dir_ownership "$DIR"
cd "$DIR" || return 1
# Mirrors configure_caddy_for_service's own mode resolution (lib/common.sh):
# explicit CADDY_MODE from the site config wins, then a local ~/docker/caddy,
# then the legacy CADDY_REMOTE_HOST var. Only "local" joins caddy_net — a
# remote Caddy box can't resolve container names on this host's bridge
# network anyway; it reaches this service via the host's published port.
# This only ever applies to the WEB admin UI — DNS itself is never behind
# Caddy (Caddy only speaks HTTP).
local _CADDY_MODE="${CADDY_MODE:-none}"
[ "$_CADDY_MODE" = "none" ] && [ -d "$DOCKER_DIR/caddy" ] && _CADDY_MODE="local"
[ "$_CADDY_MODE" = "none" ] && [ -n "${CADDY_REMOTE_HOST:-}" ] && _CADDY_MODE="remote"
local _CADDY_NET_BLOCK=""
local _CADDY_NET_SECTION=""
if [ "$_CADDY_MODE" = "local" ]; then
_CADDY_NET_BLOCK=" networks:
- caddy_net
"
_CADDY_NET_SECTION="
networks:
caddy_net:
external: true
name: ${SITE_CADDY_NET:-caddy_net}
"
fi
local WEBPASSWORD
WEBPASSWORD="$(generate_password 24)"
# v6 image: config lives entirely under /etc/pihole (TOML-based
# pihole.toml) — the old v5 split with a separate /etc/dnsmasq.d volume
# and WEBPASSWORD env var are both gone. FTLCONF_webserver_api_password
# replaces WEBPASSWORD; FTLCONF_dns_listeningMode=ALL is required under
# Docker's default bridge networking or Pi-hole ignores queries from
# anything but localhost. cap_add matches Pi-hole's own official compose
# example — NET_ADMIN specifically is only needed if this instance is
# ever used as a DHCP server too, which it isn't here, but the other two
# (SYS_TIME, SYS_NICE) are part of that same documented baseline.
cat > docker-compose.yml << PIHOLE_COMPOSE
name: pihole
services:
pihole:
image: pihole/pihole:latest
container_name: pihole
hostname: pihole
restart: unless-stopped
environment:
TZ: \${TZ}
FTLCONF_webserver_api_password: \${WEBPASSWORD}
FTLCONF_dns_listeningMode: ALL
volumes:
- ./etc-pihole:/etc/pihole
ports:
- "53:53/tcp"
- "53:53/udp"
- "${WEB_PORT}:80/tcp"
cap_add:
- NET_ADMIN
- SYS_TIME
- SYS_NICE
${_CADDY_NET_BLOCK}${_CADDY_NET_SECTION}
PIHOLE_COMPOSE
cat > .env << PIHOLE_ENV
TZ=${SITE_TZ:-$(cat /etc/timezone 2>/dev/null || echo UTC)}
# Admin web UI password (System Console / login screen).
WEBPASSWORD='${WEBPASSWORD}'
CADDY_NET=$SITE_CADDY_NET
PIHOLE_ENV
chmod 600 .env
mkdir -p etc-pihole
chown -R "$ACTUAL_USER:$ACTUAL_USER" "$DIR"
echo ""
log_success "Pi-hole configured at $DIR (DNS on 53, admin UI on port $WEB_PORT)"
configure_caddy_for_service "Pi-hole" "pihole:80" "pihole"
local _caddy_configured=false _caddy_mode=""
if declare -p CADDY_SERVICE_CONFIGURED >/dev/null 2>&1; then
_caddy_configured="$CADDY_SERVICE_CONFIGURED"
_caddy_mode="$CADDY_SERVICE_MODE"
fi
# ── Firewall ─────────────────────────────────────────────────────────────
# DNS (53) is opened unconditionally — this is meant to be queried
# directly by devices on the network, never fronted by Caddy. The web UI
# port only needs opening if Caddy ISN'T fronting it locally (matches the
# pattern documented in CLAUDE.md for every other service in this repo).
if command -v ufw &>/dev/null; then
ufw allow 53/tcp comment "Pi-hole DNS"
ufw allow 53/udp comment "Pi-hole DNS"
if [ "$_caddy_configured" != "true" ] || [ "$_caddy_mode" = "remote" ]; then
ufw allow "${WEB_PORT}/tcp" comment "Pi-hole admin UI"
fi
fi
write_readme "$DIR" << MD
# Pi-hole
Network-wide DNS-based ad/tracker blocking. Standalone install — **not**
wired into wg-easy, Netbird, or any other VPN here. To actually use it,
point a device's DNS settings at this box's IP on port 53, either by hand
per-device or via your router's DHCP DNS setting.
## Access
- Admin UI: http://localhost:${WEB_PORT} (or via Caddy if configured above)
- Admin password: see \`.env\` → \`WEBPASSWORD\`
- DNS: this box's IP, port 53 (standard DNS port — not configurable per-instance)
## Using it
Nothing points at this automatically. Options, in order of how much you
want blocked by default:
- **Per-device**: change that device's DNS server setting to this box's IP.
- **Whole LAN**: change your router's DHCP-assigned DNS server to this box's IP
(every device on that network picks it up automatically going forward).
- **Over the VPN too**: this needs a manual edit on the wg-easy side — set
wg-easy's DNS setting to this box's IP so it's pushed to VPN peers. Not
done automatically by this installer, on purpose (you said standalone).
## Port 53 already in use?
The installer warns but doesn't block if something's already listening on
53 at install time. The common, harmless case on Ubuntu is systemd-resolved
bound only to \`127.0.0.53:53\` (loopback stub) — Pi-hole's container
publishes on the host's real interfaces, not that loopback address, so the
two normally coexist fine. If something else genuinely holds \`0.0.0.0:53\`,
free it first or Pi-hole's container won't start:
\`\`\`
ss -tulnp | grep ':53 '
\`\`\`
## Manage
\`\`\`bash
cd $DIR
docker compose up -d # start
docker compose down # stop
docker compose logs -f # logs
docker exec -it pihole pihole -g # force a blocklist update (gravity)
\`\`\`
MD
local START=""
prompt_yn "Start Pi-hole now? (y/n):" "y" START
if [ "$START" = "y" ] || [ "$START" = "Y" ]; then
docker compose up -d \
&& log_success "Pi-hole started" \
|| log_warning "Start failed — check: docker compose logs"
fi
echo ""
echo " Admin UI: http://localhost:${WEB_PORT}"
echo " Password: see $DIR/.env"
echo " Nothing points at this DNS server yet — see the README for how to"
echo " actually route devices to it."
echo ""
}
# Run immediately when executed directly (deferred until after function definition)
[[ "${_RUN_STANDALONE:-0}" == 1 ]] && install_pihole
+15 -5
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@@ -9,7 +9,17 @@
# Ported from ubuntu-post-install-24.04-crowdsec.sh (# ---- WG-EASY ----).
# Own ~/docker/wg-easy/ with a standalone docker-compose.yml + .env.
# Requires cap_add: NET_ADMIN + SYS_MODULE and ip_forward sysctl.
# Forward UDP 51820 on your router to this server for external VPN access.
# Forward UDP 51830 on your router to this server for external VPN access
# (default — scanned/moved at install time if already taken; see below).
#
# Default port deliberately isn't WireGuard's conventional 51820: Netbird's
# own WireGuard listener also defaults to exactly 51820, and this is the
# one service in this repo where two completely independent tools (this
# repo's own wg-easy and a separately-installed Netbird) are both likely to
# reach for the same hardcoded upstream default with no scanning of their
# own on Netbird's side. Starting one port family away avoids that
# collision in the common case; the scan below still moves both further if
# even the new default is somehow already taken.
# ── Standalone bootstrap ──────────────────────────────────────────────────────
# Detected when the script is executed directly rather than sourced by setup.sh.
@@ -207,13 +217,13 @@ CBLOCK
fi
# ─────────────────────────────────────────────────────────────────────────────
register_service wg-easy utilities "WireGuard VPN with web management UI (wg-easy); peers mesh through this hub automatically, with a script to sync SSH aliases" 51821
register_service wg-easy utilities "WireGuard VPN with web management UI (wg-easy); peers mesh through this hub automatically, with a script to sync SSH aliases" 51831
install_wg-easy() {
require_docker || return 1
local WGEASY_DIR="$DOCKER_DIR/wg-easy"
local WEB_PORT="51821" VPN_PORT="51820"
local WEB_PORT="51831" VPN_PORT="51830"
if [ "$DRY_RUN" = true ]; then
echo "[DRY-RUN] wg-easy would:"
@@ -221,7 +231,7 @@ install_wg-easy() {
echo " - Auto-detect public IP for WG_HOST"
echo " - Generate a random web UI password"
echo " - Pin WG_DEFAULT_ADDRESS=10.8.0.x (subnet 10.8.0.0/24)"
echo " - Expose port 51821 (web UI) + 51820/udp (VPN), both auto-scanned if occupied"
echo " - Expose port 51831 (web UI) + 51830/udp (VPN), both auto-scanned if occupied"
echo " - Require router port-forward: UDP <VPN port> → this server"
echo " - Offer a Caddy reverse proxy and to start the container"
echo " - Offer to also allow SSH from the VPN subnet (additive, doesn't remove public SSH)"
@@ -232,7 +242,7 @@ install_wg-easy() {
# Scan for free host ports, moving both together — a plain install
# shouldn't silently claim a port another already-running service holds.
# Whatever VPN_PORT ends up as is what needs forwarding on the router
# (the messaging below reflects the final value, not the 51820 default).
# (the messaging below reflects the final value, not the 51830 default).
# See CLAUDE.md's "Port collision avoidance" section.
while port_in_use "$WEB_PORT" || port_in_use "$VPN_PORT" udp; do
WEB_PORT=$((WEB_PORT + 1))