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jwoolard
Asked: 2014-06-12 17:08:46 +0800 CST

Remap domain onto subdomain using bind

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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?

domain-name-system

2 Answers

  1. 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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  2. You can point both zones to the same zone file...

    zone "foo.internal.example.com" {
  type master;
  file "foo.zone";
};
zone "foo.bar.com" {
  type master;
  file "foo.zone";
};

    As long as you use the shorthand @ and short hostnames like host1 IN A 10.1.2.3 and not the FQDN such as host1.foo.bar.com. IN A 10.1.2.3 in your zone file...

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