What is a reverse proxy?

The proxy is your access to the website through a machine. You are active, the site is passive, the site can not get your real IP address.

Reverse proxy is the Web site through a machine published to the public network. You visit the agent machine directly, and then through the machine to access the site. You can't get the real IP address of the website. The advantage is that the Web server is protected, and many machines can be resolved to the same IP address through a passive proxy server.

Sort of like a router's port map.