[SWLUG] connecting through LAN

[Dick Bain]

Hi guys
persuaded my son of this handyness of using linux for penetration 
testing but he has a problem that is beyond me! Below is the email he sent

Ok linux expert.
> 
> I'm trying to configure my mandrake installation to connect through a 
> default gateway to the internet, i know the connection works cos im on it 
> now in win NT, and i'm using the same dns and gateway and IPaddy settings.. 
> the network card selected is the right one.. but it wont connect
> ...
> 
> am i missing something obvious? or what?

id you can think of anything to help he can be contacted at 
nathanbain at hotmail.com
thanks in advance
Dick