mod_realip is an apache 1.3 module, which changes the IP address of
the proxy server to the IP address a client, supplied by the proxy
server in "X-Real-IP" or "X-Forwarded-For" header. mod_realip is
designed for use on backends, which serve reverse proxied HTTP
requests.

WWW: http://sysoev.ru/mod_realip/

- Gleb Smirnoff <glebius@FreeBSD.org>