LAN down, cannot access firewall through LAN but works through WAN over vpn

[bobbythomas]

Hi All,

The issue started yesterday evening and there were no recent config changes. It started all of a sudden and I lost connectivity to the network while I was working from home. I have a MultiWAN setup and both of the WAN links works fine and I can access the firewall through VPN. But the issue is with LAN interface and it seems like it's totally down even though the interface status shows up in Firewall. I tried rebooting the firewall and the interface comes up and stay active for couple of minutes then it goes down. After that I cannot ping the firewall from LAN or the other way. All I get is host down (if I ping from forewall). All the WAN links are working fine and the dpinger shows up.

The issue I am guessing seems to be something with firewall rules or NAT or routing, but it's really hard to identify that, I have Zero tier and Wireguard running on the box and when I lose LAN connectivity the routing shows the LAN network gateway as a Zerotier interface or lo0 interface. Since I am running it as a VM, I tried rolling back it to an old 19.1 snapshot and it worked, but when I tried restoring the config backups the issue started happening once again.

 Any help is highly appreciated.

Thank you,
Regards,
Bobby Thomas