EXPERT RESPONSE
If this is with respect to a wireless LAN, no VPN is necessary, since there's no public network involved. Just use a peer mode connection and make sure security (WPA at a minimum) is enabled. If this is over a wide-area connection, it would be hard to recommend such a solution -- it's just too complex. It would be better to set up a server for the VPN and have all of the peers relay through there. This can easily be done with an appropriate router.
For more information, visit our Virtual Private Networking Project Guide.
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