2 network cards and Comodo?

Hi.

I have server with 2 network cards.

WAN 93.103.7.xxx
LAN 192.168.3.xxx

I want COMODO firewall set to ONLY WAN network card and leave LAN untouched.

I did add a zone for LAN network 192.188.3.1 - 192.168.03.255 and allow everything, but I notice very slow performance with file transfer. I suppose because it all goes through Comodo firewall.

Can LAN network card totally bypasses Comodo?

Thank you
Br,
kd