There are quite a few of these. Check out http://code.google.com/p/downy/source/browse/#hg/proxy http://code.google.com/p/downy/source/browse/#hg/proxy I know

There are quite a few of these. Check out http://code.google.com/p/downy/source/browse/#hg/proxy http://code.google.com/p/downy/source/browse/#hg/proxy I know this because the building where my office is has filters setup on the internet (I don't pay the bill, so who am I to complain). Because of the AppEngine proxies, they block all appspot.com domains. The crappy part is that I have a couple of projects hosted on AppEngine, so in order to access those I have to run a reverse tunnel to get around their filters. (Making this thread circular). I use this for my proxy (and set a system wide SOCKS proxy on OSX): ssh -CfgN -D 9999 myserver.com