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Before I start, I did do a quick search before posting this and couldn't really find any threads containing all the information I wanted\needed. If you can find one can you please link it?
Now onto my problem. First I will explain a little about what I want to do. I have recently setup a wireless P2P link with a friend, and am looking at adding some more clients soon. I have an existing wired network already setup that is connected to the Internet using an ADSL connection. What I want to do is to allow a single friend to use my ADSL connection, and block everyone else in our mesh out (including war drivers). I would also like to add some security to the link, and by the sounds of it the best option would be some form of VPN software. WEP is really of no use to me as everyone on the mesh would need to also have WEP enabled.
As for hardware, I currently have two linux machines (not including my router which runs a firewall distro - the Linux machines run Debian) and a few windows machines on the wired network. The first Linux machine has been setup as a workstation and test server (wired only), and the second has been setup to act as a bridge between my wired and wireless networks (different subnets, and IP ranges - one wired card, one wireless card). The first question I have is; would it be better to have the VPN server running on the wireless router, or forward VPN auth requests on the other test Linux machine and run the VPN server on that?
Seconly, what VPN software would you people recommend that is relatively easy to setup as a server in Linux, but is still secure? Also, the VPN software (protocol?) would also need to have a Windows client option as that is what the clients will be running.
If anyone requires more info please ask. Any help is appreciated.