http://www.strongcrypto.com/

LinuxCare's Strong Crypto division is proud to release VPS 2.0 Beta 2. VPS, the Virtual Private Server, is a linux-based VPN solution for
connecting disparate networks securely over the internet. Using this software, you can connect multiple networks to each other without having to
pay for expensive leased lines or dedicated connections. All you need is an internet connection for each site! 

VPS 2.0: Usage Instructions

Running VPS: Once everything is installed, VPS is installed in /usr/local/bin/vps2.0 so if /usr/local/bin is in your PATH, type in vps2.0. The main
configuration screen should appear. You can load and save configuration files from the File menu, and you can create and modify tunnel
configurations from the Configure menu. Once you've configured a tunnel or two, you can start it by clicking on Manage Tunnels... in the Configure
menu. First, you have to create a new keyfile by selecting the tunnel and then clicking on the New Key... button. Once you've created the key,
you have to put the key on the remote server. You can do this by putting the key on a floppy or other media and installing it on the remote server,
or you can do it the easy way by selecting the tunnel and clicking on the Check or Add Routes button. You'll be prompted a few times for the root
password of the remote server, and walked through the process of installing the key on the remote system. Once the key is installed in the
remote system, simply select the tunnel, and click on the Start Tunnel button. That should bring up the tunnel and automatically add the routes
you specified in the configuration file. To bring down a tunnel, simply select the tunnel and click on Stop Tunnel. 

Prerequisites: Remember, you need the following on your computer to run VPS successfully. 

       Intel 486/66 or greater running Linux 2.0.x, 16MB RAM, the faster the processor, the faster the throughput 
       Perl 5.004 or greater 
       PPP support available to the kernel (either built-in, or as a module) 
       Ssh1 (currently the latest version is Ssh 1.2.26)