Full reverse (IN-ADDR.ARPA) zones

Reverse DNS records (PTR) are generally served out of a reverse zone. For instance, if you have been assigned the block of addresses 192.168.5/24 (the 256 IP addresses from 192.168.5.0 to 192.168.5.255), the reverse DNS for this zone would be served out of a zone named

    5.168.192.in-addr.arpa

In such a case, you would setup Custom DNS for that zone, selecting the Expert interface option (PTR records can only be added in this interface). Once the zone is created, you'll be able to create PTR entries within this zone for each individual IP address. As an example, to map the IP address 192.168.5.12 to mail.example.com, you would enter:

Host: 12
TTL: 86400
Type: PTR
Data: mail.example.com

Note that is you have multiple /24 blocks, you will need a separate zone for each block.

Once you have setup the Custom DNS zone for this block, you need to have the block delegated to us. Contact your ISP (or whomever is assigning this block of addresses to you) and have them create NS records for the zone:

   5.168.192.in-addr.arpa.   86400  IN      NS      ns1.mydyndns.org.
5.168.192.in-addr.arpa. 86400 IN NS ns2.mydyndns.org.
5.168.192.in-addr.arpa. 86400 IN NS ns3.mydyndns.org.
5.168.192.in-addr.arpa. 86400 IN NS ns4.mydyndns.org.
5.168.192.in-addr.arpa. 86400 IN NS ns5.mydyndns.org.

Until that delegation is made, DNS queries for those IP addresses won't come to us, so it is not enough to simply create the zone. You MUST get it delegated to us in order for the DNS to function.

13 $type={blogger}:

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