DNS A records now return the WireGuard server IP (10.0.0.1) instead of
Docker bridge VIPs so cross-cell peers resolve service names correctly
regardless of their bridge subnet. DNAT rules (wg0:53→cell-dns:53 and
wg0:80→cell-caddy:80) are applied at startup. Caddy routes by Host header,
eliminating the Docker bridge subnet conflict. Firewall cell rules allow
DNS and service (Caddy) traffic from linked cell subnets. Split-tunnel
AllowedIPs now dynamically includes connected-cell VPN subnets and drops
the 172.20.0.0/16 range. Peers with route_via set now receive full-tunnel
config (0.0.0.0/0) so all their traffic exits via the remote cell.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
The PostUp rule appended `iptables -A FORWARD -i wg0 -j ACCEPT` which
allowed any WireGuard-connected client full internet access regardless of
per-peer rules, even when no peers were configured in wg0.conf.
Fix: change PostUp/PostDown to use DROP as the catch-all. Per-peer and
per-cell rules use -I (insert at top) so they take precedence; unknown
or unconfigured WG traffic hits the DROP at the bottom.
Also add reconcile_stale_peer_rules() called on startup to remove FORWARD
rules for peer IPs that no longer exist in the registry, preventing deleted
peers from retaining firewall access across container restarts.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
linuxserver/wireguard auto-generates its own PrivateKey on first container
start, independently of the PIC API's key-store. When the two diverge, the
API generates peer configs with the wrong server public key and the WireGuard
handshake fails silently — the client can ping the VPN subnet (10.0.0.x) but
gets no internet and cannot reach any Docker service (172.20.0.x).
Adds _sync_keys_from_conf(): called at the top of apply_config(), reads the
PrivateKey from wg0.conf, derives the matching public key, and overwrites the
API key files (private.key / public.key) if they differ. This makes wg0.conf
the authoritative source for the server identity, keeping get_peer_config()
consistent with the live WireGuard interface.
Adds 5 new tests in TestSyncKeysFromConf covering:
- key-store update when conf key differs
- no-op when keys already match
- get_peer_config() uses the synced key
- no raise when conf is missing
- apply_config() passes the synced key through bootstrap
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
apply_config() now calls _load_registered_peers() when wg0.conf is empty
so all active peers from peers.json are written back into the config file
after a bootstrap — preventing clients from losing tunnel access after
an API restart that regenerated wg0.conf from scratch.
Adds test_wireguard_vpn_routing.py (36 tests) covering:
- generate_config() PostUp/PostDown rules enabling internet forwarding
(MASQUERADE + FORWARD ACCEPT required for internet-through-VPN)
- get_peer_config() DNS field pointing to cell-dns for domain resolution
- apply_config() bootstrap peer restoration from peers.json
- _load_registered_peers() filtering (inactive, missing fields, malformed)
- add_peer() /32 AllowedIPs enforcement to prevent route leaks
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
roof