Zone transfers
Healthy DNS replication is a key requirement for service and infrastructure integrity. In the previous section, I explained the different zones. I also mentioned how to set the zone transfer permissions. Now, it is time to look into DNS replications.
There are two types of zone file replications:
- Asynchronous Full Transfer Zone (AXFR): When setting up a new secondary zone, the system will replicate a full copy of the zone file from the master server. It is not just for the secondary zone; it's applicable to other zones, too. In the event of DNS replication issues, the administrator may need to request a full zone transfer (aka complete zone transfer) from its master server from time to time.
- Incremental Zone Transfer (IXFR): After the initial full zone transfer, the system will only replicate the records that have been modified. It reduces the replication traffic as well as providing faster replication.
When there is a change in the...
