Reverse DNS/PTR

sharkey · Nov 11, 2012

On Ubuntu 9.10 with Bind.

I requested my host to ad reverse DNS and this was their reply;

We have contacted DC for reverse dns. Please make sure that you have added A records for the same.
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I have searched everything and am clueless on reverse DNS. I keep getting NXDOMAIN.

I have tried to follow several guides. This was the last one. I can't create an NS of 214-215 ns1.allcallz.com

bluejay3 said: ↑

The CNAME records should be like:
type: CNAME
name: 1
data: 1.1-30
.....
type: CNAME
name: 29
data: 29.1-30

Here is a full briefing I have for users of ISPConfig:
1. Create a new zone for the block of IPs and assign the new zone to the client
Example: Customer has 192.168.10.8/29, create zone 8-29.10.168.192.in-addr.arpa
(Note: the "8-29" zone prefix is arbitrary but helps us with identification of subnet)
2. Move the records (Example: hosts 8 through 15) manually or via database to new zone
3. In old zone (10.168.192.in-addr.arpa), add NS records for the new zone prefix
Example: NS 8-29 dns1.example.com.
NS 8-29 dns2.example.com.
4. In old zone, add CNAME records for each host in customer's range pointing to the new zone
in the form of CNAME [host] [host].[new zone prefix]
Example: CNAME 9 9.8-29
CNAME 10 10.8-29
5. Refresh the zones.
Now a PTR lookup will for 192.168.10.11 will query 11.10.168.192.in-addr.arpa and get a CNAME
of 11.8-29.10.168.192.in-addr.arpa which will return the proper value for host 11 in the newly
created zone.

(Note: This procedure can be applied to a single record and non-continous ranges)
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Reverse DNS/PTR

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