[Mageia-discuss] Odd entry in log file

[Frank Griffin]

On 05/07/2012 04:50 PM, Maarten Vanraes wrote:
> Op maandag 07 mei 2012 14:23:44 schreef Frank Griffin:
> [...]
>
> it's like this:
>
> mostly people natting will do:
>
> iptables -s 192.168.0.0/24 -o eth0 -j MASQUERADE
>
> which means internal traffic on 192.168.3.2 would go outside without being
> natted. if someone nearby uses 192.168.3.2 as a local network ip, it would get
> martians, since that network is coming from an unexpected source interface.
>
Yes, but it would go to the ISP gateway and get discarded.  Why would it 
be seen by anything else on the ISP subnet, unless the NIC were in 
promiscuous mode ?  And if that (promiscuous mode) were the case, why 
would iptables complain ?