@giyahban said in Netmap (Suricata) cause crash:

didnt know its not recommended to have vlan with inline mode.

Inline IPS Mode has some limitations. The biggest is that VLANs and other virtual interfaces are not currently well supported. Things like a Bridge or LAGG setup will not work well. VLANs are especially problematic. There is some work happening within FreeBSD's netmap code to make things better, but none of those experimental updates are present in the pfSense kernel yet.

If you want to use Inline IPS Mode, you should only deploy it on plain-vanilla Ethernet interfaces (meaning no VLANs defined and not a member of a LAGG or Bridge). You may get by with running Suricata on the physical parent interface only and NOT on each defined VLAN interface.