Description:

rpaf changes the remote address of the client visible to other Apache modules
when two conditions are satisfied. First condition is that the remote client is
actually a proxy that is defined in httpd.conf. Secondly if there is an
incoming X-Forwarded-For header and the proxy is in it's list of known proxies
it takes the last IP from the incoming X-Forwarded-For header and changes the
remote address of the client in the request structure. It also takes the
incoming X-Host header and updates the virtualhost settings accordingly. For
Apache2 mod_proxy it takes the X-Forwared-Host header and updates the
virtualhosts