infact i got a sattelite based internet service (only download, upload from dialup) from www.planetsky.com. they require me to connect to their server through vpn. in windows xp i simply create a vpn connection and it connects to their server nicely. now i want to switch to linux. but i dont know how to connect with vpn (i know how to connect to dialup in linux)
Sounds like you're accessing a Windows VPN server, in which case pptp is probably what you need:
http://pptpclient.sourceforge.net/
Paul.