DNS reverse lookup not updating automatically

Posted on 2012-08-29
Last Modified: 2012-08-29
I am running windows server 2003 and DNS and I noticied that I have a lot of OLD stale records in my reverse lookup zone in my DNS server.

How do I fix this?   I can delete all of them, but that doesn't fix it, as I deleted some manually a while ago.  Is there a setting in DNS somewhere to automatically update the reverse DNS pointers when a PC changes it's IP address?
Question by:afacts
    LVL 13

    Accepted Solution

    Ensure that Dynamic Updates are available on the reverse lookup zone.  You can set a scavenging cycle with the "Aging" button on the general tab to clean up old records. (7 to 14 days is usually good).

    Author Comment

    got it, so you're saying just check the box "scavenge stale resource records"
    Also, on the
    no-refresh interval
    refresh interval
    They both say 7 days
    Should I need to change anything?

    Author Comment

    Maybe I should make it 1 day, as my DHCP lease is set to 1 day?
    LVL 13

    Expert Comment

    Yes, you could.  I wouldn't do the scavenging on your primary domain (Ie domain.local) as if you have static entries (which everyone does for printers, routers, switches, etc) these will get scrubbed.  The reverse lookup zone is pretty safe to scrub.

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