UDP P2P Tunnel application

I need a proof of concept application running on linux to allow RealVNC / TightVNC / UltraVNC to make a direct connection between server and client similar to Teamviewer. We have not yet decided which of the above to use but it should all work the same in the end. The mediation server must first try and make a direct connection and try every possible way to establish a direct connection between server and client before switching over to repeater mode and using the dedicated servers bandwidth to pass data between client and server. Your test application must however be hosted by you to see if it really works on a global scale. The initial success rate of the above needs to be tested in order to move on the the full project. After proof of concept you will be required to implement and develop full application with unique client ID's that will be saved on each client and server. The second phase of the project will be awarded to you automatically but please indicate estimated cost for this in your correspondence. In essence we want Teamviewer functionality but with our own mediation server. If you have a complete solution already I will need to test it first. If so I will cancel this project and create a project for you especially. All correspondence will be answered. Thanks