On 2016-09-06 08:01, Bob Harold wrote:
I agree with one PTR per IP. But since you have 5 IP's, you can have one PTR record on each, just be sure there is a matching forward "A" record. Your list of 5 names looks good, but only if each service uses the corresponding IP for its outgoing connections, which could be difficult or not the most efficient. (What is missing here is why 5 IP's - parallel for more traffic, connections to different Internet providers, ...?)
It sounds to me like the provider assigned a /29, and speaking as a small host, distributing the traffic to different IPs often makes life easier in the short and long term.
It could be a matter of separating outbound traffic (separating email streams is wise, for example), for firewalling efficiency, they might have separate virtual machines answering each IP, HTTP optimization is a factor too in a pre-HTTP/2 world.
Tons of other possible reasons, none of which are really relevant to the best practices involved with PTR record naming.
_______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
