none
Reverse DNS records do not match forward lookup records RRS feed

  • Question

  • I've noticed our reverse DNS entries are not matching up with our forward DNS entries.  In the past I've chalked it up to our previous admin using a linux DHCP server to issue leases to windows clients and not having PTR records setup correctly.  We have since disabled DHCP and issue all IP's statically.  That being said, if we setup a brand new laptop on the domain the forward lookup entry will populate just fine with a host a record, but the reverse lookup will never be populated for that machine at all.  Any ideas on what might be happening?
    Tuesday, February 19, 2019 6:25 PM

All replies

  • Hi,

    Thanks for posting in the forum.

    It seems like the A records have been updated while the PTR records are not.

    In Windows system, normally a PTR is created or updated when you run ipconfig /registerdns command

    or have checked the update associated PTR record option on the DNS console

    Or when you have setup the DHCP server to automatically update A and PTR records.

    Would you please check and see if linux DHCP server has the similar feature?

    Regards,

    Zoe


    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Wednesday, February 20, 2019 3:33 AM
  • Hi Zoe,

    The update associated pointer (PTR) record is NOT checked.  Do I have to go in and check each one of those or is there a way to globally do this for all of them?

    As for the linux DHCP servers, we decommissioned them and turned them off about a year ago and are just statically assigning IP addresses to our users since we are a smaller office with few changes.  

    Thanks!

    Wednesday, February 20, 2019 1:56 PM
  • Hi,

    Thanks for your information.

    Based on our lab test, when a device is configured to register the connection's address in DNS, it creates only an A record. To create the PTR record of a newly-joined device you may run ipconfig /registerdns command.

    Since all your devices are configured with static IP addresses, you can manually delete the out-of-date PTR records or configure scavenging on the DNS server.

    If you would like to update the DNS records dynamically, we recommend you configure a Windows DHCP server.

    Regards,

    Zoe 

     


    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Thursday, February 21, 2019 7:16 AM
  • Hi,

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

    Please let us know if you would like further assistance.

    Best Regards,

    Zoe


    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, February 25, 2019 5:45 AM
  • Hi,

    Was your issue resolved?

    If the information provided was helpful, please "mark it as answer" to help other community members find the helpful reply quickly.

    If you resolve it using your own solution, please share your experience and solution here. It will be very beneficial for other community members who have similar questions.

    Thank you for your understanding and support.

    Best Regards,

    Zoe


    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Wednesday, February 27, 2019 6:19 AM
  • Hi,

    As this thread has been quiet for a while, we will propose the solution as answer. If you need further help, please feel free to reply this post directly so we will be notified to follow it up. You can also choose to unpropose the answer as you wish.

    BTW, we'd love to hear your feedback about the solution. By sharing your experience, you can help other community members facing similar problems. Thanks for your understanding and efforts.

    Best Regards,

    Zoe


    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, March 4, 2019 3:13 AM