Suppose I own
I delegate the subdomain
www.example.com to a particular set of NS that is say a Route53 Hosted Zone. The rest of the
example.com zone is not on R53 and contains important information for other subdomain/records. You can consider this Zone 1, and you can consider the new R53 Hosted Zone as Zone 2.
I want to have
www.example.com CNAMEd to a particular endpoint, say a cloudfront distribution. Since I can't
CNAME the apex domain, instead hosted zone 2 is created in R53 with the original apex domain:
example.com. Then, inside that hosted zone, there is a record for the subdomain
www.example.com with the
I can't directly configure
www.example.com with the CNAME in hosted zone 1 for various reasons, including that the CNAME is always changing and the person controlling the CNAME only has control over zone 2.
So the full chain looks like this: User types in
www.example.com, they get NS hosted 1 records. In that zone, the record for
www.example.com points to Hosted zone 2 records. In this zone (which was created with apex
example.com) the record for
www.example.com is a
CNAME to the proper endpoint.
My question: will any DNS resolvers mistakenly cache the NS from the second zone as apex domain records? Obviously, I want those NS accessed only for the
www.example.com records. If
NS records are mistakenly thought of as in hosted zone 2, there can be a lot of issues.
If this is the case, is there any way to make sure to DNS resolvers that the apex domain nameservers are zone 1, and zone 2 records are ONLY for
www.example.com, even though they were created with the
example.com apex domain?
I understand that there are other ways to do this (
CNAME to separate domain, etc) but for logistical purposes (for now) I am only interested in setting the
NS directly for the