jwoolard asked:
I have a domain internal.example.com and a second domain foo.bar.com. Each of these domains has their own bind9 instance.
I would like to be able to access records in foo.bar.com using the subdomain foo.internal.example.com. ie I want the lookup xx.foo.internal.example.com to forward to the foo.bar.com DNS server as xx.foo.bar.com.
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 internal.example.com zone:
foo IN DNAME foo.bar.com.
A query for xx.foo.internal.example.com would then return a synthesized CNAME pointing to xx.foo.bar.com.
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