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? Dave
