On Fri, Sep 2, 2011 at 7:53 PM, Kurt Buff <[email protected]> wrote: >> Having your DNS tied to your connectivity or web hosting provider is >> not good. Having it independent means you can change other things >> much easier. Highly recommended. > > Forgive the ignorance, but where does this leave PTR records?
At the DNS protocol level, reverse DNS has absolutely no connection to forward DNS. None. Zip. Zero. Nada. The fact that the records happen to mean something to other protocols -- and to people -- doesn't matter as far as DNS is concerned. So the above doesn't leave PTR records anywhere different, but it doesn't help them, either. Reverse lookups are always the responsibility of the entity which has obtained the address space from the RIR. So if you're an Autonomous System and get a delegation from a RIR, you can do as you like. If you're not an AS (and if you're asking, chances are you're not), it's up to whoever owns the address space (usually your ISP, or maybe their ISP) to manage reverse DNS. They can delegate to you in the DNS protocol, or provide some means for you to request changes on their nameservers, or just tell you to pound sand. Since you're already beholden to your ISP for the IP feed in the first place, being beholden to them for the reverse DNS is usually minor in comparison. If they cut off your IP feed it's not like you care much what the addresses reverse to anymore. Usually the most annoying part is trying to deal with your ISP's process for requesting changes, but unless you have a lot of turnover in your address usage this is usually a one-time thing. And since reverse records don't have anything to do with forward records, you can manage them independently during a transition, too. For example, if you're changing ISPs, you can get the reverse records set-up the way you want before you start using the addresses for anything (or publishing forward DNS records which reference those addresses). -- Ben ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
