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>
The per-cell catch-all DROP was reaching position 5 before our ACCEPT
(position 6) because apply_all_cell_rules can re-run after
ensure_cell_api_dnat, pushing the DNAT ACCEPT below the DROP.
Fix: add the API-sync ACCEPT inside apply_cell_rules itself, tagged with
the cell's own tag and inserted LAST (= position 1, above the DROP).
Since it's part of the cell's rule block it is always in the right
position relative to the catch-all DROP, regardless of call order.
Also adds _get_cell_api_ip() helper (docker inspect cell-api) so the
destination IP is always current, and two new tests that verify both the
rule exists and that the insertion order guarantees it wins over DROP.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
cell-api has no route to remote WG tunnel IPs — only cell-wireguard does.
Fix _push_permissions_to_remote() to use 'docker exec cell-wireguard curl'
so outbound sync HTTP traverses the WG tunnel from the right namespace.
On the receive side, add ensure_cell_api_dnat() which installs three
iptables rules inside cell-wireguard on startup:
- PREROUTING DNAT: wg0:3000 → cell-api:3000 (Docker bridge IP)
- POSTROUTING MASQUERADE: so cell-api's reply routes back via wg0
- FORWARD ACCEPT: allow the wg0→eth0 forwarded traffic
Called from _apply_startup_enforcement() so rules survive container restarts.
Tests updated to mock subprocess.run instead of urllib.request.urlopen.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
When ip_range changes in Settings, the new subnet is now applied to:
- DNS zone records (network_manager.apply_ip_range)
- Caddy virtual IPs (firewall_manager.ensure_caddy_virtual_ips)
- iptables per-service rules (firewall_manager.update_service_ips)
- docker-compose.yml static IPs if writable (ip_utils.update_docker_compose_ips)
New module ip_utils.py derives all container IPs from the subnet using
fixed offsets so the entire stack stays consistent from one setting.
321 tests pass (72 new tests added for ip_utils, apply_ip_range, update_service_ips).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Server-side access control:
- firewall_manager.py: per-peer iptables FORWARD rules in WireGuard container;
virtual IPs on Caddy (172.20.0.21-24) for per-service DROP/ACCEPT targeting
- CoreDNS Corefile regenerated with ACL blocks for blocked services per peer
- POST /api/wireguard/apply-enforcement re-applies rules after WireGuard restart;
wg0.conf PostUp calls it via curl so rules restore automatically on container start
WireGuard fixes:
- _syncconf uses `wg set peer` instead of `wg syncconf` to avoid resetting ListenPort
- add_peer validates AllowedIPs must be /32 — rejects full/split tunnel CIDRs that
would route internet or LAN traffic to that peer
- _config_file() checks for linuxserver wg_confs/ subdirectory first
UI:
- Peers page fetches /api/wireguard/peers/statuses for live handshake data;
status badge now shows real Online/Offline + seconds since last handshake
- IP field removed from Add Peer form (auto-assigned from 10.0.0.0/24)
Tests (246 pass):
- test_firewall_manager.py: 22 tests for ACL generation, iptables rule correctness,
comment tagging, clear_peer_rules filter logic
- test_peer_wg_integration.py: 10 tests for /32 enforcement, IP auto-assignment,
syncconf called on add/remove
- test_wireguard_manager.py: updated to reflect correct IPs and /32 requirement
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
roof