I have a wireless router / ADSL modem and a 3G card that I use to connect to the internet over PPP.
I want to be able to share my internet connection (ppp0) to my laptop via the wireless router. So my setup looks like this:
internet <=(ppp0)= desktop =(eth0)=> ADSL router
Now from my laptop, I want to connect to my ADSL router (which has built-in DHCP, not sure if that is a problem), so that I can use the internet connection on the desktop.
laptop =(wlan0)=> ADSL router => desktop => internet
Hope this makes sense.