Hi everyone,

I've looked around the net for a bit to see if anyone had solved this problem, but I didn't find anything.

I'm sharing my connection in my apartment with my roommate via a Gigafast ethernet router. The problem is, when I'm behind the router, it feels like I'm using dialup. When I'm not behind the router, it's just as fast as it should be.

I don't think there is a problem with the router, because it works perfectly fine in windows.

Any ideas?

edit: Oh, I'm using Debian distro, 2.6.5 kernel, and I have an intel pro/1000 nic.

no ideas?

I'm guessing the problem has something to do with DNS.
Possible culprits:

1) The gigafast itself is doing reverse DNS lookups to resolve your IP (unlikely)
2) Sites on the Internet are doing reverse DNS lookups to resolve your IP address (likely), and not getting a response (unlikely, since you say that when it's on the outside of the firewall it works fine, do you get the same IP as the gigafast when you do this? If not, if you configure your Linux box to have the same IP as the gigafast (unplug it) does it still work well?)
3) Your linux box is trying to do DNS lookups and timing out getting a response (possible).

The easiest thing to try is move your Linux box to the outside of the firewall, configure it to have the same IP that the gigafast would normally have, and then see how it performs. If it performs well, then it's got to be the Gigafast being slow...

The next step I'd take is to then setup your Linux box to be a host on the "DMZ", which should allow all ports to flow to it, then check performance. If that doesn't work, then the problem is the Gigafast and I'd probably return it. If that *does* work, then you know there's some service that is causing the issue (probably DNS or ident).

-Rob