I have setup a tunnel through pptp-linux. Everything works smoothly over the ethernet, I can sudo pon MYVPN and sudo poff MYVPN as I want.
But things get trick when I switch to my wi-fi dongle.
I configured everything, and my wifi connects just fine to my WPA network right from boot (ethernet cable unplugged, obviously).
But as soon as I connect to my vpn "sudo pon MYVPN" the wifi connection just dies, and won't connect again to my wifi router (i tried iwconfig and it clearly showed that).
Does anyone have an idea what I should do to make that work?