How to Set App Service - Custom Domain for Private Endpoint's Domain (e.g. privatelink.azurewebsites.net)

Furkan A 10

Hi,

As you know if your custom domain doesn't exists on the listed custom domains of web app service your app won't respond and returns 404 (as shown in the below SS).

I wonder, if there is any way to add a custom domain from Private DNS Zone without having DNS resolver or any other service. Also, private link works if I map the VNet ip address to one of the domains listed under custom domains but not for any Private Zone ones.

One note: NsLookup result returns the public ip address (20.x.x.x) of the web app service.

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Thanks

KapilAnanth-MSFT 46,876 Reputation points Microsoft Employee

2023-01-23T05:01:13.13+00:00

@Furkan A

Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.

I understand that you would like to know if you can add a custom domain to your Azure App Service via Private DNS Zone.

Can you provide more clarity on whether,

Would you like to add a new custom domain to your app service, such as "www.contoso.com" using only the Private DNS Zones and access it via Private EndPoint (i.e, make it resolve to a Private IP)?

or

You have already added the custom domain, and now you want to access it via Private EndPoint using the custom domain instead of <your-webapp>.privatelink.azurewebsites.net?

Cheers,

Kapil
KapilAnanth-MSFT 46,876 Reputation points Microsoft Employee

2023-01-24T04:03:01.5166667+00:00

@Furkan A

May I know if you got a chance to review my previous comment?

Please let me know if you are facing any challenges or if there are any follow-up questions, I shall be glad to address them.

Thanks,

Kapil

2 answers

Roderick Bant 2,051 Reputation points

2023-01-21T15:47:35.08+00:00

Hi, thank you for your question at Q&A. I understand that you are running into issues connecting a custom domain to an App Service using a Private Endpoint. There is some documentation on this scenario here.

In short: you should use the regular procedure for validating the domain via internet DNS and then make sure you have A-records in the DNS solution tied to the VNET/private network.
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Chukwudi Anya 0 Reputation points

2024-06-17T18:35:54.6833333+00:00

I believe this documentation answers your questions - https://blog.aelterman.com/2022/01/10/azure-app-service-using-a-custom-domain-name-in-a-private-namespace/
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How to Set App Service - Custom Domain for Private Endpoint's Domain (e.g. privatelink.azurewebsites.net)

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