From http://stderr.net/apache/rpaf/ Latest version is 0.6 New in version 0.6 is the ability to change which header Apache looks at. With the configuration directive RPAFheader you can now change the default X-Forwarded-For to X-Real-IP if you so choose. There are also bugfixes in this version that makes mod_rpaf work correctly with Keep-Alive requests.
in cvs, thanks