strange lines in my /var/log/warn
... and what the hack is this ? Mar 5 16:24:40 NATTY kernel: martian source 32c9c9c6 for e23613d4, dev eth0 Mar 5 16:24:40 NATTY kernel: ll header: 00 50 bf 58 52 16 00 80 c7 55 d3 74 08 00 Mar 5 16:24:43 NATTY kernel: martian source 32c9c9c6 for e23613d4, dev eth0 Mar 5 16:24:43 NATTY kernel: ll header: 00 50 bf 58 52 16 00 80 c7 55 d3 74 08 00 Mar 5 16:24:45 NATTY kernel: martian source 36910fc2 for e63613d4, dev eth1 Mar 5 16:24:45 NATTY kernel: ll header: 00 50 bf 58 52 0b 00 c0 7b a3 a7 d8 08 00 Mar 5 16:24:45 NATTY kernel: martian source 36910fc2 for e63613d4, dev eth1 Mar 5 16:24:45 NATTY kernel: ll header: 00 50 bf 58 52 0b 00 c0 7b a3 a7 d8 08 00 Mar 5 16:24:45 NATTY kernel: martian source 36910fc2 for e63613d4, dev eth1 Mar 5 16:24:45 NATTY kernel: ll header: 00 50 bf 58 52 0b 00 c0 7b a3 a7 d8 08 00 Mar 5 16:24:46 NATTY kernel: martian source 32c9c9c6 for 2ac9c9c6, dev eth0 Mar 5 16:24:46 NATTY kernel: ll header: 00 50 bf 58 52 16 00 80 c7 55 d3 74 08 00 Mar 5 16:24:46 NATTY kernel: martian source 32c9c9c6 for 2ac9c9c6, dev eth0 Mar 5 16:24:46 NATTY kernel: ll header: 00 50 bf 58 52 16 00 80 c7 55 d3 74 08 00 since a few days, i have these strange lines in my /var/log/warn. I don´t know where thy come from. does anybody know ? eth0 is my internal NIC, eth1 points to the internet. i´m using SuSE Linux 6.4. the box is a firewall and runs a squid. from the outside, all ports are closed. who can help me ? thanx maX Bauer
On Tue March 12 2002 11:27 am, Linuxdom@in-sight.de wrote:
... and what the hack is this ?
Mar 5 16:24:40 NATTY kernel: martian source 32c9c9c6 for e23613d4, dev eth0 <snip>
You probably have log_martians setting turned on by your firewall script. # cat /proc/sys/net/ipv4/conf/eth0/log_martians What kind of firewall are you using? Refer to the docs that come with it to learn how to turn it off if it bothers you. There is no harm in keeping it turned on. To manually turn it off: # echo "0" > /proc/sys/net/ipv4/conf/eth0/log_martians Martians are packets that Linux does not expect from the direction they came from (i.e. packets from internal hosts coming in on the external interface). The cause is probably a misconfigured machine on your LAN. Cheers, -- Nadeem Hasan nhasan@nadmm.com http://www.nadmm.com/
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