After running OK for a few days, I encountered a network error:
- DNS reporting “broken (recursor mode)” (to Lightning Wire Labs)
- pinging the gateway (on same network as staticly addressed red0) reported “network unreachable”
- web sites “can’t be reached”
/var/ipfire/ethernet/settings was identical, save different static IP for red0, to different instance running core 153
In the process, I discovered that the backup does not contain “/var/ipfire/ethernet/settings” which would be useful for restoring a minimally configured new installation to previous settings.
I rebooted from a minimally configured core 153 and copied “/var/ipfire/ethernet/settings” across to core 154. Core 154 now generally working, but I still can’t browse to the gateway, which is the only way of configuring it.