Quote:
Not exactly what I was looking at before.

The one I was looking at before would take requests to an address and blindly grab that request from a different, internal address. One of the examples was mail server access for people inside a specific IP block. I think.


That "program" would be the Linux kernel itself (the ipfilters firewall modules), but you'd also want a user-friendly configuration program for setting up exactly how you'd like it to work. One of the standard "Linux firewall" utilities would likely do. Maybe google that and see if you recognize the program name you're seeking in the results.

Cheers