question

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Azure vm configures dns forward, a large number of 5504 events occur, what is the reason?

This address (168.63.129.16) is configured in the DNS forwarder on Azure vm， a large number of 5504 events。

event：

The DNS server encountered an invalid domain name in a packet from 168.63.129.16. The packet will be rejected. The event data contains the DNS packet.

azure-virtual-machines
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PritamGhatak-5879 answered 49302847 edited

Hi,

Could you please explain your setup little bit like :

  1. What is the Operating System of your VM ?

  2. whether your VM is domain joined or standalone VM?

  3. Where you have configured this forwarder ?

  4. is that port no 53 is allowed between your VM and DNS server ?

  5. What kind of DNS server you are using MS DNS or some DNS appliance ?

Also I could see another blog post where same type of issue was discussed. So mentioning the link below. You can check those answers as well.

https://social.technet.microsoft.com/Forums/windowsserver/en-US/1ed06e4a-ca31-4594-b8b5-5a9e40811534/forum-faq-how-to-troubleshoot-dns-event-5504-error?forum=winserverNIS


Thanks & Regards,
Pritam Ghatak (Prips)
 

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49302847 avatar image 49302847 ·

Hi，
Set as follows：

  1. VM uses Windows 2016

  2. The vm is added to the domain, but the domain name is not in the domain, it is a separate domain name, for example: the domain is: 123.com, the domain name is: abc.com

  3. The forwarder is configured in the windows dns service

  4. Open tcp / udp 53 between vm and DNS server

Thanks & Regards,

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