Do you connect to your ISP with PPPoE by any chance? If so that sounds exactly like what happens if the MTU on your machines hasn't been decreased. Most firewalls/routers that do pppoe and NAT compensate for you these days though. Do a google search for something like 'adjust pppoe mtu' for more info.


I do. I know I lowered the MTU when I first set it up, though. Hmm.... my ppp0 is set to 1492, but eth0 (the physical card ppp0 is running over) is set to 1500. I'll try lowering this, and see what happens.