Martian Source

Hello,

yesterday have found out that file messages is full of notifications as:
linux kernel: martian source 255.255.255.255 from 192.168.0.1, on dev eth0
linux kernel: ll header: ff:ff:ff:ff:ff:ff:00:11:2f:ce:d4:f9:08:00
linux kernel: martian source 255.255.255.255 from 84.52.19.91, on dev eth0
linux kernel: ll header: ff:ff:ff:ff:ff:ff:00:11:2f:ce:d4:f9:08:00

What already have tried:

1. echo "0" > /proc/sys/net/ipv4/conf/all/log_martians - doesn't work
2. have added in /etc/sysctl.conf string
net.ipv4.conf.all.log_martians = 0 - doesn't work too

After rebooting value of log_martians remain equal to "1", although system in boot.msg reports:

Setting current sysctl status from /etc/sysctl.conf
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.all.log_martians = 0
done

Who knows, how really to disable "martian source" messages?

Thanks.

See if this helps;
http://archive.cert.uni-stuttgart.de/archi...8/msg00009.html

See if this helps;
http://archive.cert.uni-stuttgart.de/archi...8/msg00009.html
[/b]

Thank you, but no result...

I have OpenSuse 10.2 which configured on virtual server. So many ip adress are assigned to the same IP interface.

I have the same problem and after a little search I have solved it.

First edit to /etc/sysctl.conf and
Add
net.ipv4.conf.eth0.log_martians = 0
Make sure your NIC is eth0 or change to appropriate one (see your nic from ifconfig command)
then start sysctl ;

$: /etc/rc.d/boot.sysctl start

To add sysctl in boot use

$: chkconfig boot.sysctl on

Further inf;
https://secure-support.novell.com/Ka...AL_Public.html

I hope it helps
Irfan

Just out of curiosity, what does your routing table look like, and do you have a default gateway set?
Usually, these "martian sources" go away if your network is properly configured and the kernel knows how to reach the right networks. What is your network layout like?

it starts agian to log these messages I do not know why.

i have stopped but now it is agin logging these martians