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Change TTL for Forward lookup DNS zone

Steve 41 Reputation points
2020-09-25T08:44:35.737+00:00

Mix windows 2008 r2 and windows 2016 Domain controllers. DNS is Active directory integrated. Repliclation all dns servers in the forest.

Standard TTL is 1 hour. I change the TTL for a zone to 10 min. Restarted the DNS server srvice and waited a few hours, but the NS DNS entries had the new TTL setting, but not the A records.
28305-dnszone.jpg
Am i impatient??
Thanks

Windows DHCP
Windows DHCP
Windows: A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.DHCP: Dynamic Host Configuration Protocol (DHCP). A communications protocol that lets network administrators manage centrally and automate the assignment of Internet Protocol (IP) addresses in an organization's network.
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  1. Leon Laude 85,816 Reputation points
    2020-09-25T09:02:20.753+00:00

    Hi @Steve ,

    This is by design, the default TTL is just that a default for newly created DNS records. Once the records are created their TTL is independent of the Default TTL on the SOA. The Microsoft DNS implemtation copies the Default TTL setting to all newly created records their by giving them all independent TTL settings.

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    (If the reply was helpful please don't forget to upvote or accept as answer, thank you)

    Best regards,
    Leon

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  1. Steve 41 Reputation points
    2020-09-25T10:50:24.42+00:00

    aha..

    So I still have to adjust the TTL setting for the existing static dns entries, even though I have adjusted that on the zone?

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