[Mageia-discuss] Odd entry in log file

[Frank Griffin]

On 05/06/2012 02:23 PM, imnotpc wrote:
> Some of my mga2 boxes are recording lines like this:
>
> May  5 08:42:38 Cedar1 kernel: [2420746.469695] ll header: 
> 00:11:09:01:8f:2b:00:18:4d:9d:dc:39:08:00
> May  5 08:42:38 Cedar1 kernel: [2420746.470060] martian source 
> 173.194.74.154 from 192.168.3.2, on dev eth0
>
>
> I don't know about 'martian', but those IPs are indeed unfamiliar and 
> not anything I'm aware of. Any idea what is causing this and if it is 
> something to be concerned about?
Martians are IP packets which have a source or destination IP address 
that is in one of the "internal" ranges that are defined only for 
private network use, such as 10.x.x.x or 192.168.x.x.

The message is less than clear, since both IPs are identified as 
"source" or "from", which leaves you guessing as to which was the source 
and which was the target, but the 192,168.3.2 address is the culprit.

Either you're sending the packet, in which case you have a problem that 
needs to be addressed, or someone else is in which case you can ignore 
the message.