I am going to explain as well i can my situattion:
I am a student and in my room I have two possibles ways of having the net.
Via my isp (ppoe) and via the internal lan provided by the school.
Actually i am only using my adsl connection (1 WAN and 1 LAN) buut I want
also to have acces to the internal server for different applications.
So i need to have two Wan setted up.
Problem is: When i look in the interface and assign, I can only add a OPT1,
to go in the intranet.
My hardware is a pcengine with 3 ethernet cards