Why can't I connect to www.rwth-aachen.de

the_hoink at gmx.net the_hoink at gmx.net
Sat Aug 10 00:58:19 PDT 2002



On Fri, 9 Aug 2002, Norbert Moendjen wrote:

> the_hoink at gmx.net wrote:
>
> > Hello list,
> >
> > well I have a strange problem with the webpage www.rwth-aachen.de (also
> > with www.nvidia.com).
> > Any Browser (I tried galeon, mozilla, lynx, dillo so I don't think it's
> > the broswer's fault) says unable connect to remote host. Other sites are
> > OK.
> > With Gentoo, Debian and RedHat I have no problem with those sites so I
> > think this must have something to do with LFS, but I have simply no idea
> > what.
> >
> > So if you an idea what's wrong, pleast tell me.
>
> Do you use DSL? When yes, search on "mtu linux gmx" in google.
> This is a fault of broken firewalls that are unable to handle fragmentation.
>
> Ciao Nobbe

Thanx, that helped me.
Actually it wasn't the MTU size but it lead me to an article about ecn.
A simple echo 0 >/proc/sys/net/ipv4/tcp_ecn finally did it.


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