Hey PeterM,
long time since Otc 2015... Just in case the Problem is still persiststing for you, I was able to fix it for me:
File: /etc/apache2/mods-enabled/rpaf.conf
RPAFenable On
RPAFsethostname On
RPAFproxy_ips 127.0.0.1 PUTIPV6HERE
RPAFheader X-Forwarded-For
Save...