LAN unreachble from OPNSense firewall

[nicholaswkc]

Dear all,

I installed opnsense firewall quite sometimes ago n this recently happen to my opnsense box.
I unable to ping from LAN to opnsense or opnsense to LAN. I don't know why, i did not alter any firewall rules.
I cannot even browse the OPNSense GUI from LAN nor connect to internet.
Is this sign of hack because last week i did encounter this issue and i did reinstall everything but now i want to recover via cli.

How to recover it? Thanks in advance.

[Kets_One]

I would first check if your hardware is functioning correctly.
Try a different cable for example.
What kind of network chip is in the router and in the pc you are pining from?

[TheAutomationGuy]

What is the IP address that your computer is assigned?  Is it is something like 169.254.x.x?  That would indicate a connection problem between the computer and firewall where the computer failed to get a DHCP address because of this connection problem.  I would suggest that you connect the computer directly to the LAN port of the firewall.  If you are already doing this, change the network cable to a known working cable.  If that still fails, then it is likely a hardware or driver problem with the LAN port on the firewall.

If you can access OPNsense's  command line interface, you should be able to confirm what your LAN subnet is set to.  It's possible that you originally had changed it to something other than the stock configuration and when you reset the box it set the LAN subnet back to the stock configuration (which is 192.168.1.0/24 with the firewall getting the 192.168.1.1 address).  You can always reassign the LAN interface to another physical port (if available), choose a different LAN subnet address if desired, and also make sure that DHCP is turned on for that LAN subnet.