Vlan's crashing

[N#h27]

I just did a PCAP on the firewall side (Ubiquiti switch not capable of doing it on his side) to see what is actually hapening.

I see the trafic going out to the Vlan (vlan ID 4 in this case) but I don't see it come back. I wanted to disqualify the switch, so I unplugged/plugged it back in, no change what so ever. I rebooted the switch, no change. It really only works for 10 minutes or so when the firewall only is rebooted.

Maybe that the fact that traffic is going out and that the firewall doesn't see it come back might sugget some module/offload things in the background that I'm not aware off?

[N#h27]

What are the hardware offloading settings? Have you tried various variants of these, already? I'd start with "disable everything".

Thanks mate. I had left everything by default. I explicitely dissabled the VLAN Hardware Filtering and it seems to be stable now 

Now I would like to find out why it works until it doesn't anymore