@Jarhead
The info helped, try this.
Login to the pfSense GUI via any other route that the LAN interface. If you do not have another method, set one up (OpenVPN, LAN2)
Unplug the LAN ethernet (might not be needed but you need to do it any way)
Interfaces --> LAN --> Edit --> Disable
Save and apply changes
Interfaces --> Assignments --> LAN --> Change the Network port
Save changes
Interfaces --> LAN --> Edit --> Enable
Save and apply changes
Plug the ethernet cable into the new socket
should be working now, but a reboot for me did not harm
And obviously reconnect via the LAN to test