Martians

Neil Moore (amethyst@valjean.sfhs.floyd.k12.ky.us)
Thu, 30 Jan 1997 09:03:03 -0500


I recently upgraded to 2.1.23 from 2.1.16. Martian logging
has always been enabled, but I just begun to receive messages
about martians. It only occurs when I receive a packet from
a machine on the local net (other than my gateway). For
example, when I ping 170.180.106.56 (the computer next to me)
I receive:

~$ ping 170.180.106.56
PING 170.180.106.56 (170.180.106.56): 56 data bytes
64 bytes from 170.180.106.56: icmp_seq=0 ttl=60 time=9.7 ms
64 bytes from 170.180.106.56: icmp_seq=1 ttl=60 time=3.3 ms
64 bytes from 170.180.106.56: icmp_seq=2 ttl=60 time=3.2 ms
64 bytes from 170.180.106.56: icmp_seq=3 ttl=60 time=3.3 ms

--- 170.180.106.56 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 3.2/4.8/9.7 ms

Okay, that's normal. But this shows up in the log:

Jan 30 08:58:00 valjean kernel: martian source 376ab4aa for 016ab4aa, dev tr0
Jan 30 08:58:00 valjean kernel: ll header: 18 40 ff ff ff ff ff ff 00 a0 24 82 32 91 a2 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 aa aa 03 00 00 00 08 06

The same thing happens when a POP user connects. Other than the
message, everything is fine.

I am on a Token Ring network, and AFAIK nothing has changed about
the setup. I had to turn of Martian logging, as these messages
were getting too annoying. Here is the routing info:

~$ netstat -rn
Kernel routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
170.180.106.0 0.0.0.0 255.255.255.0 U 32767 0 0 tr0
0.0.0.0 170.180.106.1 0.0.0.0 UG 1 0 0 tr0

As I mentioned above, packets from the router (170.180.106.1) do not
cause this problem.

Ideas? Thanks for your time.

-- 
-Neil Moore          http://www.sfhs.floyd.k12.ky.us/~amethyst/
(finger amethyst@valjean.sfhs.floyd.k12.ky.us for my Geek Code)