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I'm probably missing something obvious here, but my sarge
box suddenly became unable to access the internet (and vice versa) the other
day. There were two unusal events that day, and unfortunately, many
ill-advised experiments in mixing coffee and beer later, I don't remember
the order of the events and the onset of my problems ;-)
1) I updated via synaptic -- however, nothing
should have been updated, if I understand how synaptic works, because one
package failed to install correctly (due to dependency problems introduced by a
non-testing package).
2) Also on the same day, power was cut from the box
(kicked power cable). The fsck made about a dozen repairs upon
startup.
Most of the time, I can't ping anything from the box, even
by IP address, and I can't ping the box from the outside. When I ping from
the box, it says "Destination Host Unreachable".
Bizarrely, there was a stretch for a few minutes at one
point when networking was working.
Anyway, I'm not sure what to look for. Here's
what I've done so far:
* I checked the cable, and that is OK. As a
check, I unplugged a working cable from the back of another computer and plugged
it into my sarge box, to no avail.
* I rebooted the computer.
* I did /sbin/ifconfig -a, which shows the machine's
correct IP address under eth0 (I'm typing the following, so excuse any
typos):
eth0 Link encap:Ethernet
HWaddr blah
inet addr:192.168.0.2
Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: blah
UP BROADCAST RUNNING
MULTICAST MTU:1500 Metric:1
RX packets: 3507 errors:1
dropped:0 overruns:0 frame:0
TX packets: 2789 errors:0 dropped:0
overruns:0 carrier:0
collisions:0
txqueuelen:1000
RX bytes:801243 (782 KiB)
TX bytes:262918 (256.7 KiB)
Interrupt: 11 blah
* I did /sbin/route, and it spits out:
192.168.0.0 * 255.255.255.0
U 0 0 0 eth0
immediately, but 30 or so seconds later (!?), it spits
out:
default 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
Is that delay unusual behavior?
* I looked at /var/log/syslog, and while I don't
understand very much that I see there, the only strange thing (to me) were a few
messages about certain UDP packets that appear somewhat sporadically every once
in a while, usually in bursts of one message every couple minutes. These
message occur even while I can't get anything else to work, btw.
* Top shows low CPU usage, 46M memory free.
* df -k shows plenty of space.
* I updated (via manual download on another machine, copy
to CDROM, and dpkg) from kernel-image-2.6.3-1 to
kernel-image-2.6.7-1-k, just for the hell of it.
* I have an AMD K7 system with a Kingston KNE100TX
NIC. I'm using a DLink DI-514 router, and other machines on that router
are working fine.
Sorry for the long message. What should I do
next?
Thanks,
Kevin Murphy |