martian source from, on dev eth0

Hello all

So as in the topic in my /var/log/messeges i heve a lot of things like
this one
martian source from, on dev eth0

Im using Mandrake 10, witn 2 network cards. eth0 (provider) and eth1
(my local nework ) . Eth0 is conected to my service provider, and i
have my own public ip.

I have readed lot of post but none of them explaining what is the real
problem of this " martian source" . From time to time
my eth0 goes down and I suspected that this information about maritian
is a problem and i dont know how to stop it. On mandrake im runing my
proftpd dhcpd ssh and apache and vnc.

Any advice