Apache Reference: mod_proxy, ProxyPass

ProxyPass

Map Remote Servers into Local URL Space
Syntax: ProxyPass local-path A
Example: ProxyPass /foo/ http://www.foo.dom/
Since: Apache 1.1

This directive allows remote servers to be mapped into the URL space of the local server. In this situation, the local server does not act as an HTTP proxy in the conventional sense, but optically appears to mirror the remote server. The local-path argument is the name of a local virtual path, and the remote-url argument is a partial URL for the remote server. Requests under local-path on the local server will be translated into requests under remote-url in the background. More flexible mapping can be achieved by using the proxy flag of mod_rewrite's RewriteRule directive.