2,147 questions
DNS issues for B2C endpoints that are hosted on Azure
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Mike Billiet
0
Reputation points
We are having DNS issues with the Azure B2C endpoints. We are getting random issues where DNS is not resolving the url. The EndPoints are being hosted on Azure and I need help identifying how to ensure that the DNS will resolve. What steps do I need to go through to ensure that DNS will resolve the url? We have a custom domain setup for the endpoints, and I'm leaning towards there may be some additional configuration needed to be done, however, i'm not entirely sure that will resolve the issue we are having with DNS.
When digging into the DNS, the CNAME alias we are getting only has a TTL of 5 minutes. Therefore, every 5 minutes, the DNS having to lookup/resolve the url.
Has anyone else run into the issue where an endpoint being hosted on Azure has DNS issues where it cannot resolve? If yes, what steps did you take to fix it so the DNS resolves every time?
Thanks!
Mike
{count} votes
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James Hamil 23,216 Reputation points Microsoft Employee2023-10-11T13:33:52.5733333+00:00 Hi @Mike Billiet , can you please try these steps and let me know if anything improves?
- Check your custom domain configuration: Make sure your custom domain is properly configured and pointing to the correct Azure B2C endpoints.
- Verify DNS records: Ensure that your DNS records, such as CNAME and A records, are correctly set up for your custom domain.
- Adjust DNS settings: If you're using custom DNS servers, make sure they can resolve public DNS records used by your app. Your DNS configuration should either forward requests to a public DNS server, include a public DNS server like Azure DNS in the list of custom DNS servers, or specify an alternative server at the app level.
- Configure name resolution behavior: You can modify the default behavior of name resolution in App Service by adjusting retry attempts and retry timeout.
Please let me know the results and I can help you further.
Best,
James
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Mike Billiet 0 Reputation points
2023-10-11T20:05:23.3166667+00:00 James - Thank you for the response and additional insight on what items i should check/verify. I'm working on going through each item to try to confirm/verify everything is configured properly. I will reach out once I've gone through your checklist. Thanks again.
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