Which method to use to set up a dynamic port mapper

Question

I have a web app which relies on a number of back end services, and I would like to be able to dynamically switch between different instances of these services. So the thinking was to create an intermediate app which listens on some ports and redirects traffic as required.

If I was dealing with pure HTTP I would look at doing this with Apache and proxy_pass, which would be ideal (fast, reconfigureable with no down time), but it's not just HTTP traffic, which is why I'm stuck

Any nudges in the right direction would be appreciated.

Thanks,

Rob

Answer 1

Why don't you use a software (e.g. Vyatta, pfSense, etc.) or hardware router and put some NAT rules in places?

A pretty neat open source app I sometimes use when I quickly need to forward some ports, etc. to do some testing is TcpTunnel: http://www.vakuumverpackt.de/tcptunnel/