Setting up VPN on Mac 10.6 Snow Leopard
Here you will find the setup guide for your Mac OS X 10.6 Snow Leopard. We will begin with PPTP VPN and proceed with L2TP IPsec VPN. Two different types of VPN protocols and it may be a good idea to create one of each. If one fails to connect depending on how restrictive your network, you try the second connection.
Users who already had the vpn configured on Mac 10.6 reported an issue when upgrading from 10.6 to 10.6.1. The VPN had to be removed and re-added from scratch. This seems to resolve the issue.
If after creating the VPN connection on your Mac you are unable to browse the internet, appears that you have no internet or appears that you are not routing via the vpn (ip not changing) check the FAQ page..