Strange behavior

[Calimarina]

I have this situation where the network will go down periodically. Here's the strange part. The system will be fine, but the moment I try to access OPNsense the network goes down for about a minute or two and then it's fine and I can access OPNsense. It's like clockwork. Wait about 20 minutes or so network is fine, access OPNsense, network goes down then fine again. Anyone have any ideas on what that might be?

[viragomann]

Could possibly be an IP conflict in your network.
Look into the system general log and search for ARP entries showing an IP toggling between two MACs.