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

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


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

Azure Virtual Machines
Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
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  1. Pritam Ghatak 231 Reputation points


    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.

    Thanks & Regards,
    Pritam Ghatak (Prips)


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