Network Weirdness

[Paul Howarth]

On Fri, 2005-06-03 at 15:36 -0500, David G. Mackay wrote:
> I've got an old AMD-K6-400 box that's been running FC3 that I've been
> using as a router/firewall.  I recently ran up2date, and suddenly I
> couldn't access several websites.  After playing around for a bit, I did
> a clean install of FC4t3 on the box to see if that would resolve the
> problem.  It didn't.  I can access most sites normally.  I can also plug
> the Alcatel USB Speedtouch modem into a Win2k box, and access the
> problematic websites.
> 
> I've done some archive searches to see if anyone else experienced this,
> and came across the ecn problem, but my /proc/sys/net/ipv4/tcp_ecn is 0.
> Ironically, one of the sites that I can't access is bugzilla.redhat.com
> (although fedora.redhat.com is fine).
> 
> When I look at a tcpdump of the situation, I see the tcp connection
> handshake followed by a GET request to the web site.  Instead of
> returning the contents of the web page in response, I see a packet with
> no data acking the get request packet.
> 
> Does anyone have any ideas?

See if this helps:

# echo 0 > /proc/sys/net/ipv4/tcp_window_scaling

Paul.
-- 
Paul Howarth <paul at city-fan.org>