In a reverse-mapping zone, a PTR (pointer) record maps an IP address to a hostname. Before adding a PTR record to a reverse-mapping zone, you must first create the zone. You can also add PTR records to forward-mapping zones to support zeroconf (zero configuration networking), such as wide-area Bonjour. For information about the Bonjour protocol, refer to http://www.apple.com/support/bonjour. Though adding PTR records to forward-mapping zones supports some of the use cases in RFC 1101, it does not support the network name mapping use case described in the RFC. For more information, refer to http://tools.ietf.org/html/rfc1101.
To create a PTR Record, complete the following:
- From the Cloud Services Portal, click Manage -> DNS -> Zones.
- Click the DNS view.
- Click the zone.
- Click Create -> Record and select PTR Record from the drop-down list.
On the Create PTR Record page, select or specify the following:
- Address: Enter the owner name of the PTR Record, in the form of either an IP address or a name.
- Zone: Select an associated zone from the column selector.
- Domain Name: Enter the domain name record data for the PTR Record.
- Description: Enter a descriptive comment about the PTR Record.
- TTL: Enter a numeric value and select Hours, Minutes, or Seconds from the drop-down.
- Disable for DNS Protocol: Click this check box to temporarily disable for DNS Protocol. For more information, see Enabling and Disabling Zones.
- Tags: Click Add to associate keys with values. Specify the following details:
- KEY: Enter a meaningful name for the key, such as a location or a department.
- VALUE: Enter a value for the key such as San Jose (for location), or Accounts (for department).
- KEY: Enter a meaningful name for the key, such as a location or a department.
- To remove a tag, select the respective check box and click Remove to delete the associated tag. For more information about tags, see Managing Tags.
- Click Save & Close to save.