you just need Listen 80 in httpd.conf.
make sure the virtualhost 6666 is only accessible by the AS7 nodes.
Thanks...shouldnt port 6666 also be available internally (intranet) in order to use mod_cluster_manager? or is there a better recommended method to use mod_cluster_manager?
Make sure to not expose mod_cluster_manager externally.
You might want to expose it internally but only very limited just for the admins. You need to be careful there too.
In AS7, there is an operation "/subsystem=modcluster:read-proxies-info()" that might be helpful for you as it does INFO on the proxy.