I run a series of virtual machines on a server in which people connect to via Vnc. The computers are mostly used for penetration testing so the people involved are pretty techy.
My dilemma is that they can generally bypass the security of any on board software to restrict access to the internet. So I was looking at alternatives and I found a idea to run the internet through a proxy server. How would I best go about creating a proxy server? I have a spare box running linux if possible a way of doing this on a linux box would be greatly appreciated.
Just as a side question how dramatically will the internet slow down if I do decide to run it through a proxy the internet is currently running at 15mbps
Sorry if didnt go into enough detail i'll be happy to elaborate if necessary. Open source tools would be greatly appreciated.