404 Status Code Encountered with Azure Front Door Custom Domain

Question

404 Status Code Encountered with Azure Front Door Custom Domain

Avinash 85

An Azure Front Door application is set up, but accessing the custom domain results in a 404 status code page not found we are getting. What are the potential causes and solutions for this issue?

Praveen Bandaru 3,565 Reputation points Microsoft External Staff Moderator

2025-04-21T18:02:45.29+00:00

Hello Avinash
Just checking in to see if above information was helpful. If you have any further updates on this issue, please feel free to post back.

Hope the above answer helps! Please let us know do you have any further queries.

Please do consider to “up-vote” wherever the information provided helps you, this can be beneficial to other community members.
Avinash 85 Reputation points

2025-04-22T16:54:54.1333333+00:00

Hi @praveen Bandaru thank you for the detailed suggestions! I'm happy to report that the issue with the 404 status code when accessing the custom domain has been resolved.

While I'm not able to share specific details about the backend configuration publicly, your advice to check the backend URL directly and review the Front Door origin configuration provided valuable direction.

I appreciate the link to the documentation for collecting logs as well. While I didn't need to go that far this time, it's good to have that resource for future reference.

Thanks again for your help!"

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Praveen Bandaru 3,565 Reputation points Microsoft External Staff Moderator

2025-04-21T18:02:45.29+00:00

Hello Avinash
Just checking in to see if above information was helpful. If you have any further updates on this issue, please feel free to post back.

Hope the above answer helps! Please let us know do you have any further queries.

Please do consider to “up-vote” wherever the information provided helps you, this can be beneficial to other community members.
Avinash 85 Reputation points

2025-04-22T16:54:54.1333333+00:00

Hi @praveen Bandaru thank you for the detailed suggestions! I'm happy to report that the issue with the 404 status code when accessing the custom domain has been resolved.

While I'm not able to share specific details about the backend configuration publicly, your advice to check the backend URL directly and review the Front Door origin configuration provided valuable direction.

I appreciate the link to the documentation for collecting logs as well. While I didn't need to go that far this time, it's good to have that resource for future reference.

Thanks again for your help!"

Answer 1

Hello Avinash
I understand that you are receiving a 404-status code while accessing the front door custom domain.

For further investigation, could you please let me know what the backend of the front door is?
Also, check if the backend URL is working when accessed directly. If it is not working, the issue is likely coming from the backend side.
Additionally, in the front door origin configuration, you can test by adding the backend host header to the origin host header and try again.
You can also collect the tracking reference ID in the access logs or in the HAR logs when encountering the 404 error. Use this reference ID to check logs in your Azure portal. Please refer to the following document for collecting the logs:

Document: https://learn.microsoft.com/en-us/azure/frontdoor/refstring?source=recommendations&tabs=edge

Hope the above answer helps! Please let us know do you have any further queries.

Please do consider to “up-vote” wherever the information provided helps you, this can be beneficial to other community members.

Praveen Bandaru 3,565 Reputation points Microsoft External Staff Moderator

2025-04-22T16:59:54.5933333+00:00

Hello Avinash

I just converted my comment into an answer. Please accept it, as it will be helpful to other community members.

Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.

If you have any other questions or are still running into more issues, let me know in the "comments" and I would be happy to help you.

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404 Status Code Encountered with Azure Front Door Custom Domain

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