Adding a PTR Record Set

Scenarios

You can create PTR record sets to map private IP addresses to domain names.

For more information about each type of record sets, see Record Set Types and Configuration Rules.

Constraints

• You can create PTR record sets only in private zones.
• PTR record sets can only be added to private zones whose domain name suffix is in-addr.arpa.

Procedure

1. Log in to the management console.
2. In the service list, choose Network > Domain Name Service.

   The DNS console is displayed.

3. In the navigation pane on the left, choose Private Zones.

   The Private Zones page is displayed.

4. Click on the upper left and select the desired region and project.
5. Locate the zone and click Manage Record Set in the Operation column.
6. Click Add Record Set.

   The Add Record Set dialog box is displayed.

7. Configure the parameters based on Table 1.

   Table 1 Parameters for adding a PTR record set

   Parameter	Description	Example Value
   Name	Name of the PTR record set	10.1.168 For example, if the IP address is 192.168.1.10, the domain name in the PTR record is 10.1.168.192.in-addr.arpa. If the domain name is 192.in-addr.arpa, enter 10.1.168. If the domain name is 1.168.192.in-addr.arpa, enter 10.
   Type	Type of the record set A message may be displayed indicating that the record set you are trying to add conflicts with an existing record set.	PTR – Map IP addresses to domains
   TTL (s)	Cache duration of the record set on a local DNS server, in seconds. The value ranges from 1 to 2147483647, and the default value is 300. If your service address changes frequently, set TTL to a smaller value.	300
   Value	Private domain name mapped to the private IP address. You can enter only one domain name.	host.example.com.
   Tag	(Optional) Identifier of the record set. Each tag contains a key and a value. You can add up to 10 tags to a record set. For details about tag key and value requirements, see Table 2.	example_key1 example_value1
   Description	(Optional) Supplementary information about the record set. The description can contain no more than 255 characters.	-

   Table 2 Tag key and value requirements

   Parameter	Requirements	Example Value
   Key	Cannot be left blank. Must be unique for each resource. Can contain no more than 36 characters. Cannot start or end with a space nor contain special characters =*<>\,|/	example_key1
   Value	Cannot be left blank. Can contain no more than 43 characters. Cannot start or end with a space nor contain special characters =*<>\,|/	example_value1

8. Click OK.
9. Switch back to the Record Sets tab.

   The added record set is in the Normal state.

Related Operations

For more information, see How Can I Map the Private IP Address of an ECS to a Domain Name?