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Forward Lookup Zone / Conditional Forwarder Preference Order RRS feed

  • Question

  • If I add a Conditional Forwarder for somedomain.net and a Forward Lookup Zone for subdomain.somedomain.net when running DNS queries which will take precedence? Is there any documentation on this?
    Tuesday, March 12, 2019 4:24 PM

Answers

  • Hi,

    A DNS server configured to use a forwarder behaves as follows:

    1. When the DNS server receives a query, it attempts to resolve this query using the primary and secondary zones that it hosts and its cache.
    2. If the query cannot be resolved using this local data, then it will forward the query to the DNS server designated as a forwarder.
    3. The DNS server will wait briefly for an answer from the forwarder before attempting to contact the DNS servers specified in its root hints.

    So, the forward lookup zone has a higher priority.

    Best regards,

    Travis


    Please remember to mark the replies as an answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

    • Marked as answer by PanosE Thursday, March 21, 2019 6:55 PM
    Wednesday, March 13, 2019 2:18 AM
    Moderator

All replies

  • Hi,

    A DNS server configured to use a forwarder behaves as follows:

    1. When the DNS server receives a query, it attempts to resolve this query using the primary and secondary zones that it hosts and its cache.
    2. If the query cannot be resolved using this local data, then it will forward the query to the DNS server designated as a forwarder.
    3. The DNS server will wait briefly for an answer from the forwarder before attempting to contact the DNS servers specified in its root hints.

    So, the forward lookup zone has a higher priority.

    Best regards,

    Travis


    Please remember to mark the replies as an answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

    • Marked as answer by PanosE Thursday, March 21, 2019 6:55 PM
    Wednesday, March 13, 2019 2:18 AM
    Moderator
  • Hi,

    Just checking in to see if the information provided was helpful.

    Please let us know if you would like further assistance.

    Best Regards,

    Travis


    Please remember to mark the replies as an answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

    Thursday, March 21, 2019 6:33 AM
    Moderator
  • yes, thank you - sorry, couldn't add comments on my phone.
    Friday, March 22, 2019 8:40 AM