sunpascal,

As I said, if you have dhcp you can use the ipconfig /release command,
But since that is not the case, do you require to log in using a VPN connection? I used to have adsl with a vpn connection a long time ago, back then I had installed linux to see what linux was all about, but since I could not get a VPN pptp connection to work in that time I removed linux from my system...

I don't get how ipconfig /release works.
If you have a dhcp connection and the server has assigned a ip to your network card you can simply release the connection with ipconfig /release
see here for details,

Anyway... Now I got adsl with dhcp so I can't help you except link you to a few pages I found, you can experiment with those and see if you can get it to work,

http://www.knoppix.net/forum/viewtop...highlight=pptp
http://www.google.nl/search?hl=nl&q=...tnG=Zoeken&lr=
http://www.google.com/linux?hl=en&lr...=Google+Search
http://www.knoppix.net/forum/search.php (use these keywords: pptp or pptp vpn)

Goodluck! I hope this will help you on your way a little,

weedje