the fact that I have a Linksys E3200 may not be important. I can configure the router through the web interface, but I don't know the things I will be toggling are called.

I already do simple port forwarding to access applications on my Mac remotely. So router admin is not something I technically need explained.

I'm looking to running a proxy on my home computer, that filters all HTTP traffic that goes through my router. So if my daughter is on her iPad and accesses Safari, my Mac will be the judge of the validity of the request. I need something like NetNanny I guess, but local. Actually, anything that can just filter all port 80 traffic that runs locally, but maybe validates with a password?

I truly truly hope this question falls within the bounds of Serverfault. I'm not a total internet newb but I'm at a loss for what to Google.

If possible answer this question:

Is there a webapp that can listen on port 80, and validate requests to port 80 with a password?

If so, can I forward all traffic on port 80 to my Mac, to be re-routed to the user? Is this the same as a VPN?

Thank you for your help.

Justin