libapache2-mod-rpaf - 0.6-13 main

rpaf is short for reverse proxy add forward.
.
rpaf is for backend Apache servers what mod_proxy_add_forward is for
frontend Apache servers. It does exactly the opposite of
mod_proxy_add_forward written by Ask Bjorn Hansen.
.
It 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 its 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.