How to reset interface for pfsense

[jimfreeze]

I woke up this morning and my router was not working.
I checked the etc/hosts file, and instead of seeing

 cat /etc/hosts
127.0.0.1	localhost localhost.home.arpa
::1	localhost localhost.home.arpa
192.168.100.1	pfSense.home.arpa pfSense

I saw this

 cat /etc/hosts
127.0.0.1	localhost localhost.home.arpa
::1	localhost localhost.home.arpa
192.168.10.1	pfSense.home.arpa pfSense

The interface for the firewall had switched to LAN3.
That's great, but LAN3 was not connected to anything.

I don't see a way to reset the interface. Can someone give me some insight on this?

[SteveITS]

@jimfreeze If you have a backup or the backup config exists on disk you can restore.

Interfaces can be assigned in the GUI or via the console menu.

192.168.1.1 is the default IP. Was 192.168.10.1 a typo somewhere?

[jimfreeze]

@steveits Hi.

Thank you for the reply.

So, the IP I had set was 192.168.100.1

I see that I can make assignments of a named interface to a physical port.

What I don't see is how pfsense selects an interface for it's domain.

It was using my bridged interface, and even survived reboots.
However, today it had decided to use LAN3 interface address space for the domain found in /etc/hosts.