Strange NAT messages on multicast packets

From: Jonathan Morton (chromi@cyberspace.org)
Date: Thu Mar 01 2001 - 21:43:48 EST


I'm seeing a lot of messages in my gateway's system log of the form:

lithium kernel: NAT: 0 dropping untracket packet c233f340 1 10.38.10.67 ->
224.0.0.2

Virtually all these packets come from machines on the student LAN on the
"outside" of the gateway. Whether or not iptables is configured to drop
the packets (on input or forward), these messages still appear.

I understand 224.0.0.2 means "multicast router", but why does my kernel
have to be so verbose about it? Is there a sensible way to turn off the
messages without playing havoc with my syslogd configuration?

Kernel 2.4.1 on a P166/MMX, compiled with gcc 2.95.2, based on a
barely-recognisable RH 6.2 installation. The NIC which these packets come
in on is a 3c509, which is not in promiscuous mode.

--------------------------------------------------------------
from: Jonathan "Chromatix" Morton
mail: chromi@cyberspace.org (not for attachments)
big-mail: chromatix@penguinpowered.com
uni-mail: j.d.morton@lancaster.ac.uk

The key to knowledge is not to rely on people to teach you it.

Get VNC Server for Macintosh from http://www.chromatix.uklinux.net/vnc/

-----BEGIN GEEK CODE BLOCK-----
Version 3.12
GCS$/E/S dpu(!) s:- a20 C+++ UL++ P L+++ E W+ N- o? K? w--- O-- M++$ V? PS
PE- Y+ PGP++ t- 5- X- R !tv b++ DI+++ D G e+ h+ r- y+
-----END GEEK CODE BLOCK-----

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Wed Mar 07 2001 - 21:00:11 EST