unkin-agent e6a06f4845 Add dnsmasq resolver and edge base-class changes to the mail gateway (#554)
The edge gateways sit in BinaryLane VPCs with no consul datacentre and a public interface, and postfix and rspamd need a caching resolver that reaches the lab over the VPN route.

- run dnsmasq as the local resolver, forwarding to 198.18.200.7, and point resolv.conf at it
- add an enable toggle to profiles::consul::client, off for the gateway role
- disable node_exporter on the gateway role, as it registers via consul
- restrict sshd AllowUsers to the edge VPCs (172.18.30.0/24, 172.18.31.0/24, 172.18.32.0/24) and the lab (198.18.0.0/16, 10.10.12.200/32)

Reviewed-on: #554
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>
2026-10-16 23:17:56 +11:00
2026-03-17 17:38:22 +11:00
2023-07-02 14:21:09 +10:00
2023-06-21 22:03:43 +10:00
2025-07-08 20:19:36 +10:00
2024-02-17 22:57:36 +11:00
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