[plug] Strange kernel messages, is any able to help please?

[Craig Ringer]

> I will take a look as you suggest. This system is only on our internal 
> network and NOT exposed to the Internet at all. What does it mean by 
> "martians"?

I'm no expert here, but I'll explain my understanding of it. Martians 
are packets that shouldn't have been able to appear on the interface 
that they did. For example, if you have a private LAN on 192.168.0.0/24 
and a packet comes in on eth0 (where the LAN is attached) from 
203.0.178.191 (iiNet's DNS) ... its a martian.

Martian packets usually indicate routing/network issues or sometimes 
deliberate attempts to bypass firewalls using spoofing. Note that it 
wouldn't be a martian if your default route was via a host on that 
private lan - but if you have a non-inet connected PC getting packets 
from IPs it doesn't know how to route to, you're getting martians.

Craig