Redirecting port 80 to another port on a single Windows computer?

Question

Assuming my Windows (xp, vista, 2003, 2008, or windows 7) computer is connected directly to the internet and has no router in between...

Is there a way to filter all traffic going TO port 80, so that it instead goes to 3128 (squid HTTP proxy)?

I found this port mapping software, but you need another computer because it can't redirect outgoing requests.

Solution 1

This article from Microsoft ( http://support.microsoft.com/kb/819961 ) discusses configuring a proxyserver for the system. For other browsers, such as firefox, you may need to configure the proxy settings independently.

Solution 2

The shareware PC Port Forwarding is all there is for redirecting outgoing traffic with an easy to use GUI under Windows. Obtain it from http://www.verigio.com/products/pc-port-forwarding/

Solution 3

I recognize this doesn't answer your question, but you should really put a real firewall/router appliance in place to do this: I would recommend either pfSense or Smoothwall.

If it has to be a Windows box for whatever reason, your best bet is ISA Server - though typically it handles in-bound routing better so this may not even be possible. As far as I know, Microsoft has not exposed the IP stack in such a way you can add custom routes/translations without writing a custom driver to sit in the network stack.

Excellent ISA resource: http://www.isaserver.org/

Solution 4

I don't believe this can be done natively in windows. Why don't you just set Squid to listen on port 80?

Solution 5

The product you are looking for is NetCat and does exactly what you need. Check the Wikipedia page. The specific command line you want is

nc -l -p 80 | nc localhost 3128

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Comments

[Net Citizen]

Even if not native, please let me know a program that can do it instead

[EEAA]

There's this really sweet program called Linux that would fix this in a heartbeat. ;)

[Fernando]

In this network arrangement, where does the proxy server live? Is the Windows machine the web server or client? BTW, there is always a router between you and the "Internet". Just as Soilent Green is made of people, the Internet is made of routers.

[Net Citizen]

Because I want to transparently router all web page traffic through squid. I don't think setting squid to listen on port 80 has anything to do that. Am I maybe missing something in the understanding of squid?

[Net Citizen]

This allows me to receive any traffic on port 80 (incoming). What I need to do is redirect any outgoing traffic on port to go to 127.0.0.1 3128.

[Net Citizen]

I need to do this in a transparent way

[Scott Pack]

Welcome to Server Fault! Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference.