Matches the DNS the USG used on its WAN (wan_dns1/wan_dns2), replacing the
10.0.0.194 I had set earlier. Applied to both boxes and saved; VRRP unchanged
(MASTER/BACKUP), NTP still synced, no config drift.
/config/modes/unifi.boot was RE-CAPTURED on both afterwards. It had been taken
before this change, so the escape hatch would have quietly reverted the
resolver on any rollback -- a snapshot is only an escape hatch for the state it
was taken from.
Two things recorded in the runbook:
- The boxes' name resolution now depends on the internet, so between
unplugging the USG and PPPoE establishing they have no DNS. Harmless:
nothing in the switch resolves a name, and the health checks use DNS
precisely to prove the WAN came up.
- Internal ad.itaz.eu names still resolve via Google, because that zone is
published publicly with private addresses in it (nas001 -> 10.0.0.194,
kvm-macstudio1 -> 192.168.3.8). So no conditional forward was needed --
though it is worth knowing the internal topology is public.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DMVzWZgiKW2wquf5z8S1yH
3768657b91