Remap domain onto subdomain using bind

jwoolard asked:

I have a domain and a second domain Each of these domains has their own bind9 instance.

I would like to be able to access records in using the subdomain ie I want the lookup to forward to the DNS server as

Is there a way to do this in bind9?

My answer:

Sounds like you might be able to use the (otherwise rarely seen) DNAME record.

For instance, in the zone:

foo     IN      DNAME

A query for would then return a synthesized CNAME pointing to

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