Adding a PTR Record Set

Scenarios

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

For details about other record set types, 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.

  For details about how to create a PTR record for a public domain name, see Creating a PTR Record.

Procedure

1. Go to the Private Zones page.
2. Click in the upper left corner and select the desired region and project.
3. Click the domain name.
4. Click Add Record Set.

   The Add Record Set dialog box is displayed.

5. 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 private zone is 192.in-addr.arpa, enter 10.1.168 in the box. If the private zone is 1.168.192.in-addr.arpa, enter 10 in the box.
   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. For details, see Why Is a Message Indicating Conflict with an Existing Record Set Displayed When I Add a 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 is 300. If your service address changes frequently, set TTL to a smaller value. Learn more about TTL.	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 a record set. Each tag contains a key and a value. You can add a maximum of 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. You can enter a maximum of 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 a maximum of 36 characters. Cannot start or end with a space nor contain special characters =*<>\,|/	example_key1
   Value	Cannot be left blank. Can contain a maximum of 43 characters. Cannot start or end with a space nor contain special characters =*<>\,|/	example_value1

6. Click OK.
7. Switch back to the Record Sets tab.

   You can view the added record set in the Normal state.

Related Operations

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