Route 53 Subdomains not working.

Question

I purchased a domain on CloudFlare. I moved DNS management over to Route 53. Using this domain as an example "petstore.net" I created a hosted zone for this and for the following subdomain "xyz.petstore.net" and configured NS servers as per AWS documentation.

In short the subdomain does not work. I have been told this domain is not being resolving by the NS. It has been a few days now so I know it is not a propagation issue. I have also have an experienced Cloud Engineer look at the issue and he told me its not a configuration error and that the NS servers are not resolving and this domain is not routable.

Any advice would be appreciated.

Answer

Going back one step, you've purchased **petstore.net** through CloudFlare and have delegated administration of it to Route 53. Is this part working okay, i.e. can you create a dummy record like **testing.petstore.net** in the route 53 public zone and it propagates correctly?

If this doesn't happen then delegation isn't working properly, so something in here has been missed https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/migrate-dns-domain-in-use.html

If delegation is working then the next step will be creating a Route 53 public zone called **xyz.petstore.net**, noting the name servers this is populated with, and then adding these as NS records for the record name **xyz.petstore.net** in the Route 53 public zone for **petstore.net**

Full steps for this are here https://repost.aws/knowledge-center/create-subdomain-route-53

And the accompanying video illustrates the steps https://www.youtube.com/watch?v=YHBnLJiKv0M

Answer

Did you create the subdomain zone as a Private or Public one? If the "xyz.petstore.net" NS record in the "petstore.net" hosted zone is pointing to the right aws ns servers (of the subdomain hosted zones) AND CloudFlare was properly set with the NS records pointing to "petstore.net" zone ns servers....it should work.

Route 53 Subdomains not working.

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