FC3: Most network protocols time out

[jasperc]

Folks,

I'm having a strange problem in FC3. I've disabled ipv6 via in /etc/modprobe.conf. Now, however, just about every type of protocol times out when I attempt to get anywhere on the internet. Ssh appears to work, but http, https, ftp, etc. make an initial connection, then time out and die. tcpdumps show many retries, but no data is passed back to my machine. The initial 3-way TCP handshake occurs, but nothing after.

Yum doesn't work, web broswers don't work, ncftp/ftp doesn't work. I've looked over everything that I can think of (iptables settings, network settings, etc.), but I'm stumped. Any ideas? I can supply any file or settings. Here's a uname dump (as a dmesg dump made this post too long):

Linux version 2.6.9-1.667 (bhcompile@tweety.build.redhat.com) (gcc version 3.4.2 20041017 (Red Hat 3.4.2-6.fc3)) #1 Tue Nov 2 14:41:25 EST 2004
And an lsmod:

Module Size Used by
ipt_REJECT 6465 1
ipt_state 1857 2
ip_conntrack 40693 1 ipt_state
iptable_filter 2753 1
ip_tables 16193 3 ipt_REJECT,ipt_state,iptable_filter
i2c_dev 10433 0
i2c_core 22081 1 i2c_dev
uhci_hcd 31449 0
snd_intel8x0 34829 0
snd_ac97_codec 64401 1 snd_intel8x0
snd_pcm_oss 47609 0
snd_mixer_oss 17217 1 snd_pcm_oss
snd_pcm 97993 2 snd_intel8x0,snd_pcm_oss
snd_timer 29765 1 snd_pcm
snd_page_alloc 9673 2 snd_intel8x0,snd_pcm
gameport 4801 1 snd_intel8x0
snd_mpu401_uart 8769 1 snd_intel8x0
snd_rawmidi 26725 1 snd_mpu401_uart
snd_seq_device 8137 1 snd_rawmidi
snd 54053 9 snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_ oss,snd_pcm,snd_timer,snd_mpu401_uart,snd_rawmidi, snd_seq_device
soundcore 9889 1 snd
3c59x 36585 0
floppy 58609 0
dm_snapshot 17029 0
dm_zero 2369 0
dm_mirror 23341 2
ext3 116809 2
jbd 74969 1 ext3
dm_mod 54741 6 dm_snapshot,dm_zero,dm_mirror

Any help would be greatly appreciated!

[bunsen]

can you access e.g. google or your yum repositories when you are "pinging" them from a terminal at the same time?
what nameservers are in your /etc/resolv.conf?

[jasperc]

can you access e.g. google or your yum repositories when you are "pinging" them from a terminal at the same time?
what nameservers are in your /etc/resolv.conf?

As far as browsing goes, if I open lynx, I can watch as the bps rapidly drops to 0; there's an initial connection, some info gets sent, but then things slow to 0.

Pinging works, so ICMP is OK. And again, ssh works.

My name servers are fine. I use the same ones for an FC2 machine, which operates with no problems.

[pdxplm]

I had to edit my /etc/resolv.conf and add my dns entries for my connectivity issues. Once I did that, things hum like a champ!

[jasperc]

I had to edit my /etc/resolv.conf and add my dns entries for my connectivity issues. Once I did that, things hum like a champ!

Nope, it's not a DNS or resolv.conf issue, as I can initially get to any machine on the internet. The connection slows down to 0 bps, then the connection times out (if I'm lucky; my yum sessions just hang).