<IfModule rpaf_module>
    RPAFenable On

    # When enabled, take the incoming X-Host header and
    # update the virtualhost settings accordingly:
    RPAFsethostname On

    # Define which IP's are your frontend proxies that sends
    # the correct X-Forwarded-For headers:
    RPAFproxy_ips 172.0.0.0/8

    # Change the header name to parse from the default
    # X-Forwarded-For to something of your choice:
    RPAFheader X-Real-IP
</IfModule>