Master/Slave Reverse Zones

Master Reverse Zone

While in the Master zone your hostname is pointed to an IP address, using the Master Reverse zone allows you to point an IP address to a hostname. The Master/Slave Reverse Zones are available only for premium customers. 

Master reverse zone is so useful because:

• Enables mapping of IP addresses to hostnames.
• Enhances DNS configuration for servers and network setups.
• Improves credibility and spam filtering in email servers by setting up PTR records.

How to add it in 6 easy steps?

1. Log in to your ClouDNS account.
2. Navigate to the DNS zones and click on the [Add New] link.
3. Select the Master Reverse Zone box.
4. Enter the zone name:
   - For IPv4, use the format 1.0.0.127 for IP 127.0.0.1.
   - Choose in-addr.arpa from the drop-down menu.
   - For IPv6, use the format 1.2.3.4.5.6.7.8.9.0.1.2.3.4.5.6.7.8.9.0.1.2.3.4.5.6.7.8.9.0.1.2 for IP 2109:8765:4321:0987:6543:2109:8765:4321.
   - Choose ip6.arpa from the drop-down menu.
5. Create the zone and add PTR records pointing to your domain(s).
6. Request the IP owner to delegate the management of the IP to our servers.

Tips:

The reverse zone name for the zone has to be in a specific format. The reverse name starts with your IP address, written backward. If your IP is 1.1.115.125., you need to reverse it to 125.115.1.1. After the zone is created you will be able to add the PTR record(s) pointed to your domain(s). When you create the Master Reverse zone, you need to ask the IP owner to delegate the management of the IP to our servers.

Video tutorial: How to add Master Reverse DNS zone?

Slave Reverse Zone

The Slave/Backup Reverse DNS zone is the read-only copy of the DNS records. This means that the DNS records cannot be added directly to the Slave/Backup Reverse DNS zone. The Slave/Backup Reverse DNS zone can receive the updated records only from the Master Reverse zone of the DNS server. So, we can say that Slave Reverse DNS zone: 

• Provides backup for DNS records.
• Ensures high availability and failover capabilities.
• Keeps DNS records synchronized with the Master Reverse Zone.

How to add it in 6 easy steps?

For creating Slave Reverse Zone (Secondary DNS for Reverse DNS zones), you can follow the steps bellow: 

1. Log in to your account.
2. Navigate to the DNS zones and click on the [Add New] link.
3. Select the Slave Reverse Zone box.
4. Enter the reverse zone name:
   - For IPv4, use the format 1.0.0.127 for IP 127.0.0.1.
   - Choose in-addr.arpa from the drop-down menu.
   - For IPv6, use the format 1.2.3.4.5.6.7.8.9.0.1.2.3.4.5.6.7.8.9.0.1.2.3.4.5.6.7.8.9.0.1.2 for IP 2109:8765:4321:0987:6543:2109:8765:4321.
   - Choose ip6.arpa from the drop-down menu.
5. Enter the Master server’s IP and click Register.
6. DNS records will automatically synchronize from the Master Reverse Zone.

Tips:

The IPv4 zone needs to be in the format 1.0.0.127 for IP 127.0.0.1 and from the drop-down menu need to be chosen in-addr.arpa. The IPv6 zone needs to be in the format 1.2.3.4.5.6.7.8.9.0.1.2.3.4.5.6.7.8.9.0.1.2.3.4.5.6.7.8.9.0.1.2 for IPv6 2109:8765:4321:0987:6543:2109:8765:4321 and from the drop-down menu needs to be chosen ip6.arpa. The master IP can be either IPv6 or IPv4, no matter what is the type of the zone.

Video tutorial: How to add Slave Reverse DNS zone?