Can't reach forums.gentoo.org.

[Nojan]

This is really the weirdest thing that happened to me in times. I have two Gentoo boxes at home. Both are behind a router that has a broadband dialup connection which is almost always on as it's a flatrate. Since yesterday, I can't reach forums.gentoo.org from one of the boxes anymore. I can ping it, the DNS is resolved correctly but I get a timeout on port 80 of this and only this remote address (140.211.166.170). All other web addresses work just perfectly (e.g www.gentoo.org).
But if I boot into w2k on the same box, it works w/o any problems. As I write this, I'm on w2k on this very box. I can also reach forums.gentoo.org w/o any problems on my other gentoo box.

Any ideas?

Cheers,

Nojan