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SvenGloeckner5's avatar
SvenGloeckner5
Brass Contributor
Mar 31, 2023
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Outbound endpoint ip address of Azure DNS Private Resolver

Hi,   we need to find out the ip address that's used in the outbound endpoint of Private Resolver for configuring our onPrem firewall.  We cannot find anything about this in the docs or in Azure p...
  • SvenGloeckner5's avatar
    SvenGloeckner5
    Jan 05, 2024

    Try to answer my own question.

    The correct answer is, that outbound there is no dedicated IP address. Instead, outbound endpoint uses dynamically allocated IP addresses. This also implicates that one has to allow IP address ranges for the on-premises firewall to get it working correctly.

shankerhari's avatar
shankerhari
MCT
Apr 04, 2023
The question is not very clear, Can you elaborate on the scenario along with the problem statement
  • SvenGloeckner5's avatar
    SvenGloeckner5
    Brass Contributor
    Apr 05, 2023

    Hi,

    thanks for your reply.
    I'll try to explain the scenario. We want to try the usage of Private DNS Resolver. It should forward DNS traffic to our on-premises DNS servers. However, we have a firewall on premises that needs to be configured to let the DNS traffic pass. Currently, the firewall is blocking DNS forwarding traffic. 

    The Azure Portal does not allow to view the IP address of the outbound endpoint.

    Now my question again: Which IP address(es) do we have to enable in the firewall to allow DNS traffic passing through?

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