Q:

pfSense inaccessible from LAN

My pfSense ( pfSense version 2.3.4, FreeBSD 10.3-RELEASE-p19) homemade router from older PC was working just fine for few months but it suddenly stopped working and is inaccessible from any LAN devices - can't access web GUI or ping it.  Windows says that the DNS server is not responding.  pfSense it self can ping LAN devices and WAN addresses.  If anyone has other suggestion then reinstalling it I would be grateful.  Thanks. 

A:

Maybe it's a firewall rule that's blocking out the whole LAN segment? 
If you have SSH access to the pfSense console you can try to disable (very temporarily) all the firewall rules:
Turn firewall off:
pfctl -d

Turn the firewall back on:
pfctl -e

