Lan not communicating with WAN

[krazyderek]

after an hour of normal operation, my LAN just stops talking to the WAN???

all LAN users stay connected to each other, computers, printers, server etc, i don't think rebooting the switch has any effect…..

and PPTP VPN user's are still connected through the WAN to the PFsense box and can browse the web, i can also still connect to the pfsense box remotely via the WAN interface, but i can't connect to the PFsense box via the LAN interface......

It's the most puzzling thing, a restart will fix the problem but only for another hour or so, i can't see anything glaring in the logs.

How can i make sure that it isn't a hardware failure while i'm in the web interface when the problem happens