i have monowall installed and running for quite some time now without any
problems, however when i installed it i used old and slow ethernet cards,
now that we purchased a new and faster ethernet cards i want to replaced the
old ones. i'm afraid to mess up the working configuration especially my
DMZ/NAT services, if you were me guys, what would be the first card that i
should replace? WAN? LAN? DMZ?

need you expert opinions guys.

TIA