Apache - Reverse Proxy and HTTP 302 status message

Question

My team is trying to setup an Apache reverse proxy from a customer\'s site into one of our web applications.

http://www.example.com/app1/some-path maps to http://intern

Answer 1

The AskApache article is quite helpful, but in practice I found a combination of Rewrite rules and ProxyPassReverse to be more flexible. So in your case I'd do something like this:

    
       ServerName www.example.com

       ProxyPassReverse /app1/some-path/ http://internal1.example.com/some-path/
       RewriteEngine On
       RewriteRule /app1/(.*)   http://internal1.example.com/some-path$1 [P]

       ...
    

I like this better because it gives you finer-grained control over the paths you're proxying for the internal server. In our case we wanted to expose only part of third-party application. Note that this doesn't address hard-coded links in HTML, which the AskApache article covers.

Also, note that you can have multiple ProxyPassReverse lines:

    ProxyPassReverse / http://internal1.example.com/some-path
    ProxyPassReverse / http://internal2.example.com/some-path

I mention this only because another third-party app we were proxying was sending out redirects that didn't include their internal host name, just a different port.

As a final note, keep in mind that Firebug is extremely useful when debugging the redirects.