Bind9 – Sending Reverse Records To Another Name Server

Occasionally I’ll have the need to send a block of reverse DNS entries from my BIND9 server over to someone else.

When you create the entries in your reverse zone, be sure to use a DNS name verses an IP address for the alternate name server:
If my subnet is 1.1.1.0/24 and I wanted to send IP 1.1.1.2 over to DNS server 2.2.2.2 to be resolved I would do it as such.

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2.1.1.1.in-addr.arpa.	IN	NS	ns1.newserver.com.

In the above example, ns1.newserver.com resolves to 2.2.2.2.

If you try and do it like this, it will fail!:

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2.1.1.1.in-addr.arpa.	IN	NS	2.2.2.2.

You also can’t have a PTR record and an NS record for the same address.

Happy resolving 🙂