DNS Virtual Network Gateway with Cloud Resources

Robert Pangrazio 1 Reputation point
2021-11-16T14:54:50.287+00:00

I have been trying to find an answer to this, but I can't, so if there is one out there please let me know.

I am trying to access DNS resolved cloud-based resources from on-premises computers via a Virtual Network Gateway I have set up. I have two VNets and am set up to ping from Vnet 1 to Vnet 2 and VPN clients and all combinations of the three, but only via IP address.

I would like to be able to have a machine on either VNet be able to access any VPN devices via DNS resolution and vice versa.

Thanks in advance for any advice.

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  1. Cristian SPIRIDON 4,471 Reputation points
    2021-11-17T20:41:24.273+00:00

    Hi,

    I think you can solve your use case by setting up a private DNS in Azure:
    https://learn.microsoft.com/en-us/azure/dns/private-dns-getstarted-powershell

    Hope this helps!

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  2. Bhanu Ejjagiri 261 Reputation points Microsoft Employee
    2021-11-23T18:27:59.477+00:00

    Hi @Robert Pangrazio
    You can access any Azure resource over it’s FQDN by creating a DNS record, and here you need to create a private DNS record to have the VM responded over it’s name instead of it’s IP.

    • You will need to create DNS records if the VM is Windows Domain joined and Windows DNS is in place.
    • Else, I encourage you to create an Azure Private DNS --> link your Azure private networks --> create/update the VM related record of the VM's.

    Reference Articles:
    https://learn.microsoft.com/en-us/azure/dns/private-dns-getstarted-portal
    https://learn.microsoft.com/en-us/azure/dns/private-dns-privatednszone

    Please feel free to let me know if you have any further queries and I will be happy to assist you accordingly.

  3. Robert Pangrazio 1 Reputation point
    2021-11-29T18:19:18.567+00:00

    I am in the process of verifying that this will solve my problem. Once I do, I'll update the question

  4. Robert Pangrazio 1 Reputation point
    2021-11-29T20:14:34.46+00:00

    I'm not seeing what I am looking for. So maybe if I give more detail into what I am trying to do.

    I have a Virtual Network Gateway that allows my on-premise Linux computers to connect via OpenVPN. They are successfully connecting and I am able to ping cloud VM's and ping them from the cloud VMs.

    I would like to be able to access them via DNS. However, due to the nature of the Linux machines, they will not be maintaining a constant VPN connection as they are shut down and restarted on a regular, if not daily basis. So the IP address created by the VNG may change.

    These machines can number in the hundreds, so maintaining a DNS record database would be onerous.

    What I am looking for is a way I can dynamically add host information into a DNS system, and then have my on-premises Linux machines use that DNS system to resolve hostnames for cloud resources, and cloud resources use it to resolve the Linux machines.

    I hope that makes my request a little more clear.

    Thanks in advance

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