windows server 2012 dns issue !

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  In your case, you have what is called a Split-brain DNS.

  https://blogs.technet.microsoft.com/networking/2015/05/12/split-brain-dns-deployment-using-windows-dns-server-policies/.

  Because the DNS zone is the same internally and externally it complicate a bit every public facing applications but what you can do is add manually the records in your internal DNS zone with the public IP of your applications

  ex: suppose your public web site is on IP 177.22.33.44 and the DNS name is www.smartsystems.jo, then just create a A record in your Internal DNS zone with the same setings but do not create the reverse lookup zone.

  With this new record, your client will be able to access your public web site by query your internal domain name.

  Also, you must update manually your records in case of the public IP change.

  hth

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  This posting is provided AS IS without warranty of any kind

  Tuesday, October 17, 2017 1:34 PM
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  Hi Omar Salous，
  
  When you want to resolve xxx.smartsystems.jo, it will only query to the zone of smartsystems.jo. If the queried name does not find a matched answer in the zone of smartsystems.jo, it will not go forwarder or root hints.
  As cthivierge said,this scenario is called a Split Zone, where the name is the same internally and externally.
  To handle a split-zone, you could refer to the following scenarios:
  1) simply tell users they must use the 'xxx' record.
  2) Install IIS on the DCs and redirect
  3) Prevent the DCs from registering of the domain host records
  For more details, please refer to the following link:
  

  DNS (internal domain has same name as external website)

  https://social.technet.microsoft.com/Forums/ie/en-US/4d97325b-ff3a-4f46-ba6e-dc3f4ff978e1/dns-internal-domain-has-same-name-as-external-website?forum=winserverNIS

  How do you manage different internal and External Domain names?

  https://social.technet.microsoft.com/Forums/windowsserver/en-US/26da4868-e548-4f84-976e-762d908bde23/how-do-you-manage-different-internal-and-external-domain-names?forum=winserverDS

   

  Best Regards,
  Candy

  
  

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  • Edited by Candy LuoMicrosoft contingent staff Wednesday, October 18, 2017 2:04 AM
  • Proposed as answer by Candy LuoMicrosoft contingent staff Monday, October 23, 2017 8:32 AM

  Wednesday, October 18, 2017 2:04 AM
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  Hi ，

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

  Please let us know if you would like further assistance.

  Best Regards,

  Candy

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

  Monday, October 23, 2017 8:32 AM
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  hi ... sorry for long time to response ... my problem was not because of split brain DNS .... i only need to add secondary dns as this link
  Configure Secondary DNS Server in Windows Server 2008

  but some domain PCs (windows xp) didn't work to insert website name but work when insert web site ip address
  
  

  • Marked as answer by Omar Salous Thursday, March 22, 2018 11:37 AM

  Thursday, March 22, 2018 11:36 AM