An addendum to the last post about playing PS3 LAN games over the Internet using a VPN.
In that setup the PS3 was connected to a laptop which was connected via a VPN to the other players. This worked fine, but required two network interfaces. One for the PS3, one for the Internet.
A simpler solution exists. Leave the PS3 and PC connected to the Internet as usual. Create a bridge between the TAP interface and the interface used to connect to the Internet. Follow the other steps in the last post.
This may be slower than the previous setup because the PS3 traffic has to pass through the PC to get to the VPN. It will work though and it takes less setup because you don't need to play with any cables.
Hope you find this usefull. Happy gaming.