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Hi everyone,
I'm experiencing a strange issue with my OPNsense firewall after testing an internal mail server, and I'm hoping someone can help shed some light on it.
Here's what's happening:
While the mail server was connected, all devices in the accepted list (which bypass firewall authentication) lost internet access.
As soon as I unplugged the mail server's network cable, those devices immediately regained internet connectivity.
Now, even though all devices are successfully connected and receiving DHCP IPs, and I can see valid ARP entries:
No active session info is being shown for any users in the firewall.
No logs are being generated related to traffic, sessions, or firewall activity.
Additionally, there are brief disconnections (~2–3 seconds) every 2–3 hours across the network.
I've already rebooted the firewall, double-checked the DHCP and firewall rule configs, and everything looks fine—but the session tracking and logging just aren't working.
Could the mail server have introduced a conflict or caused something (like NAT or state table corruption) that's still affecting the firewall?
Any help, suggestions, or troubleshooting tips would be much appreciated!
Thanks in advance!
I'm experiencing a strange issue with my OPNsense firewall after testing an internal mail server, and I'm hoping someone can help shed some light on it.
Here's what's happening:
While the mail server was connected, all devices in the accepted list (which bypass firewall authentication) lost internet access.
As soon as I unplugged the mail server's network cable, those devices immediately regained internet connectivity.
Now, even though all devices are successfully connected and receiving DHCP IPs, and I can see valid ARP entries:
No active session info is being shown for any users in the firewall.
No logs are being generated related to traffic, sessions, or firewall activity.
Additionally, there are brief disconnections (~2–3 seconds) every 2–3 hours across the network.
I've already rebooted the firewall, double-checked the DHCP and firewall rule configs, and everything looks fine—but the session tracking and logging just aren't working.
Could the mail server have introduced a conflict or caused something (like NAT or state table corruption) that's still affecting the firewall?
Any help, suggestions, or troubleshooting tips would be much appreciated!
Thanks in advance!
