I installed FC1 onto a machine that was previously running RH9. I formatted the partitions etc, only keeping /home, deleting the rest. Configured everything to my liking (named/snmpd etc). Everything went fine, the machine (my gateway) was routing packets properly, iptables did what it should and so on. I could ssh to the machine from my local XP box just fine. Now, I proceeded to try to use yum to upgrade. It started and then nothing happened (tried three diferent yum servers). I started doing tcpdump and noticed there were about 10 packet per second going back and forth (small packets). Noticed that trying to ssh to the FC1 box from the outside was very slow. Connection established and then the key exchange took forever, seemingly stuck. After a few minutes or so it would go to the next stage in the handshake process. Dito with ftp to ftp servers, it would establish the tcp connection and then take 1-2 minutes to get the banner, which usually only takes 1-2 seconds). Telnetting to port 21 (ftp) on an external box from the fc1 box yielded the login prompt being "typed" one character at a time, approx 3-5 chars/second. All is constistant with TCP sending one character per packet. UDP and ICMP worked just fine (ping 1400 byte packets and dns resolving). It just seemed that TCP sessions going to and from the box was doing one char per packet... TCP going thru the box (routed) was not affected. TCP to FC1 from the XP box was not affected. This has never happened to me in my 8 years of running linux (redhat since v3.0.3). I tried some more troubleshooting (disabling iptables, removing the iptables modules etc). Nothing worked. I proceeded to reboot the machine and then everything was fine. Yum worked and I see no problems at all now). Anyone seen this before? I'm very puzzeled. Now after 2 more reboots after all the upgrades everything still works perfectly. -- Mikael Abrahamsson email: swmike@xxxxxxxxx
