Locked out - no access to WebGUI

[sensori]

Hi all,
I hope one pfsense guru can provide soon help.
I've accidentally deactivated the LAN access in the WebGUI. Now I'm not able to access it anymore and all my LAN machines lost connection to the internet. How can I gain access again to the WebGUI. Can it be done in the shell?
I'm trying to access the WebGUI via the WAN port, but without success.

[viragomann]

You can restore a configuration backup in the shell. Backups are made automatically on config changes.

[sensori]

@viragomann many thanks!!!

Restored, rebooted and now everything is ok again.