 | | | Networking mysteriously stops working | Networking mysteriously stops working 2004-03-12 - By Vladimir G. Ivanovic
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Recently (last few weeks), networking on my server just stops working. I
can't make any new connections (TCP or UDP) and there is no network
traffic other than some arp & netbios stuff. `ifconfig' and `route' look
normal and there's nothing in the system or kernel logs. I can restart
the network with `service network restart', and everything is
hunky-dory.
It doesn't happen that often, perhaps once every few days, but the
frequency seems to be increasing to about once a day. It stops usually
at night. (During the day I frequently listen to Internet radio and I
don't recall having to restart the network.)
When the network is not working, I've poked around with netstat,
ethereal, in addition to the two previously mentioned utilities. I
haven't seen anything unusual. Ethereal reports some arp and netbios
traffic (normal), but nothing else. It will not exit cleanly. There are
also hung processes, I suspect because they have open NFS files.
I've appended the list of rpms that I have installed. The only one I can
imagine might affect networking is, of course, the new kernel that I
installed about a month ago (kernel-smp-2.4.20-30.9 on Thu Feb 19
17:03:38 2004).
`chkrootkit-0.43b' does not report any problems, and Tripwire hasn't
shown anything unusual. I am behind a firewall (a D-Link DI624 wireless
router) that only allows inbound ftp, httpd, dns, smtp, ssh, rtsp and
cvs traffic.
Any suggestions on how to debug this problem?
Thanks.
--- Vladimir
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
Vladimir G. Ivanovic http://leonora.org/~vladimir
2770 Cowper St. vladimir@(protected)
Palo Alto, CA 94306-2447 +1 650 678 8014
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checkstyle-manual-3.1-2jpp Mon Mar 8 12:03:50 2004
checkstyle-javadoc-3.1-2jpp Mon Mar 8 12:03:38 2004
ocaml-3.06-3 Mon Mar 8 12:03:21 2004
sane-backends-1.0.9-5.5 Tue Mar 2 05:00:45 2004
ant-optional-full-1.5.4-2jpp Sun Feb 29 19:14:53 2004
xmlto-0.0.18-1_3.rh9.at Thu Feb 26 13:49:31 2004
xawtv-3.91-0_11.rh9.at Thu Feb 26 13:49:28 2004
synaptic-0.47-10.rh9.at Thu Feb 26 13:49:22 2004
mutt-1.4.2-0_10.rh9.at Thu Feb 26 13:49:20 2004
mod_python-3.0.1-4 Thu Feb 26 13:49:15 2004
libmad-0.15.1-0.b.rh90.dag Thu Feb 26 13:49:14 2004
libid3tag-0.15.1-0.b.rh90.dag Thu Feb 26 13:49:13 2004
freeglut-devel-2.2.0-1_3.rh9.at Thu Feb 26 13:49:11 2004
freeglut-2.2.0-1_3.rh9.at Thu Feb 26 13:49:07 2004
bash-completion-20040214-1.rh90.dag Thu Feb 26 13:49:07 2004
tv-fonts-1.1-0_3.rh9.at Thu Feb 26 13:49:06 2004
lyx-1.3.4-0.rh90.dag Thu Feb 26 13:48:47 2004
lirc-0.7.0-20_cvs20040208.rh9.at Thu Feb 26 13:48:40 2004
portaudio-18.1-0.dag.rh90 Thu Feb 26 13:48:39 2004
lirc-lib-0.7.0-20_cvs20040208.rh9.at Thu Feb 26 13:48:35 2004
libxslt-devel-1.1.2-1_4.rh9.at Thu Feb 26 13:48:33 2004
libxslt-python-1.1.2-1_4.rh9.at Thu Feb 26 13:48:32 2004
libxslt-1.1.2-1_4.rh9.at Thu Feb 26 13:48:27 2004
galeon-1.3.13-0.a.rh90.dag Thu Feb 26 13:48:13 2004
libxml2-2.6.5-1_8.rh9.at Thu Feb 26 13:48:07 2004
libxml2-devel-2.6.5-1_8.rh9.at Thu Feb 26 13:48:01 2004
libxml2-python-2.6.5-1_8.rh9.at Thu Feb 26 13:47:58 2004
firefox-0.8-1.rh90.dag Thu Feb 26 13:47:46 2004
atrpms-package-config-47-1.rh9.at Thu Feb 26 13:47:42 2004
atrpms-47-1.rh9.at Thu Feb 26 13:47:42 2004
up2date-3.9.10-2 Thu Feb 26 13:37:35 2004
up2date-gnome-3.9.10-2 Thu Feb 26 13:37:30 2004
quanta-3.1.5-0.fdr.0.rh90 Wed Feb 25 23:01:30 2004
amaya_gtk-8.2-1 Wed Feb 25 13:10:34 2004
kernel-smp-2.4.20-30.9 Thu Feb 19 17:03:38 2004
kernel-doc-2.4.20-30.9 Thu Feb 19 17:03:28 2004
kernel-source-2.4.20-30.9 Thu Feb 19 17:03:03 2004
firstboot-1.0.5-11 Thu Feb 19 09:02:42 2004
XFree86-100dpi-fonts-4.3.0-2.90.55 Wed Feb 18 05:15:44 2004
XFree86-75dpi-fonts-4.3.0-2.90.55 Wed Feb 18 05:15:30 2004
XFree86-devel-4.3.0-2.90.55 Wed Feb 18 05:15:10 2004
XFree86-ISO8859-15-100dpi-fonts-4.3.0-2.90.55 Wed Feb 18 05:14:00 2004
XFree86-ISO8859-15-75dpi-fonts-4.3.0-2.90.55 Wed Feb 18 05:13:52 2004
XFree86-tools-4.3.0-2.90.55 Wed Feb 18 05:13:46 2004
XFree86-truetype-fonts-4.3.0-2.90.55 Wed Feb 18 05:13:43 2004
XFree86-xdm-4.3.0-2.90.55 Wed Feb 18 05:13:41 2004
XFree86-twm-4.3.0-2.90.55 Wed Feb 18 05:13:41 2004
XFree86-Xnest-4.3.0-2.90.55 Wed Feb 18 05:13:39 2004
XFree86-4.3.0-2.90.55 Wed Feb 18 05:13:31 2004
XFree86-xfs-4.3.0-2.90.55 Wed Feb 18 05:12:48 2004
XFree86-xauth-4.3.0-2.90.55 Wed Feb 18 05:12:48 2004
XFree86-base-fonts-4.3.0-2.90.55 Wed Feb 18 05:12:36 2004
XFree86-font-utils-4.3.0-2.90.55 Wed Feb 18 05:12:19 2004
XFree86-Mesa-libGL-4.3.0-2.90.55 Wed Feb 18 05:12:19 2004
XFree86-libs-4.3.0-2.90.55 Wed Feb 18 05:12:17 2004
XFree86-Xvfb-4.3.0-2.90.55 Wed Feb 18 05:12:13 2004
XFree86-doc-4.3.0-2.90.55 Wed Feb 18 05:12:09 2004
XFree86-libs-data-4.3.0-2.90.55 Wed Feb 18 05:11:54 2004
XFree86-Mesa-libGLU-4.3.0-2.90.55 Wed Feb 18 05:11:35 2004
vim-minimal-6.2.98-1.1 Tue Feb 17 20:31:24 2004
vim-enhanced-6.2.98-1.1 Tue Feb 17 20:31:23 2004
modutils-devel-2.4.25-10 Tue Feb 17 20:31:23 2004
dvdrecord-0.1.5-1 Tue Feb 17 20:31:23 2004
cdrdao-1.1.8-0.20030828.1 Tue Feb 17 20:31:22 2004
pygtk2-devel-1.99.16-6 Tue Feb 17 20:31:19 2004
nfs-utils-1.0.5-1 Tue Feb 17 20:31:18 2004
gtk2-devel-2.2.4-5.fdr.1.rh90 Tue Feb 17 20:31:12 2004
initscripts-7.28-1 Tue Feb 17 20:31:08 2004
cmucl-2003.12-1.rh90.ccrma Tue Feb 17 20:31:07 2004
mkinitrd-3.5.15.1-2 Tue Feb 17 20:31:00 2004
lvm2-2.00.08-2 Tue Feb 17 20:30:59 2004
device-mapper-1.00.07-1 Tue Feb 17 20:30:56 2004
lvm-1.0.3-17 Tue Feb 17 20:30:55 2004
rhnlib-1.3-6 Tue Feb 17 20:30:54 2004
pygtk2-libglade-1.99.16-6 Tue Feb 17 20:30:54 2004
modutils-2.4.25-10 Tue Feb 17 20:30:53 2004
vim-common-6.2.98-1.1 Tue Feb 17 20:30:40 2004
pygtk2-1.99.16-6 Tue Feb 17 20:30:37 2004
gtk2-2.2.4-5.fdr.1.rh90 Tue Feb 17 20:30:23 2004
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