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>
roof
4ba79fd614