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9.12. Synchronizing Forward and Reverse Zone Entries

Forward entries (A and AAAA) are configured separately from reverse entries (PTR). Because these entries are configured independently, it is possible for forward entries to exist without corresponding reverse entries, and vice versa.
A DNS zone can be configured to allow its forward and reverse entries to be synchronized automatically, by setting the --allow-sync-ptr option to true. This can be done when the zone is created or when it is edited.
For example, for editing an existing entry:
[jsmith@server ~]$ ipa dnszone-mod --allow-sync-ptr example-zone
The default is false, which disables synchronization and has better server performance.