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Last active August 27, 2020 18:08
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BIND 9 Admin: Reloading Zones
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bind9-zone-reload.md

Reloading zones in BIND 9

Whenever you made changes in a BIND zone file that zone will need to be reloaded.

This can be done in two ways on a DNS master server:

  1. Restart the BIND service (for example, on an Ubuntu server):
$ sudo systemctl restart bind9
  1. Update using the rndc tool:
$ sudo rndc reload example.com
$ sudo rndc reload 0.16.172.in-addr.arpa

Note in the case above both the forward and reverse lookup zones are reloaded.

For DNS slaves, you can either:

  1. Wait for the master to pass down the updates.

  2. Use rndc, exactly as above.

I always use rndc on both my master and slave servers because: (a) it doesn't require restarting the service; and (b) the change is immediate.

NOTE: Always remember to update the serial number on changed zone files before reloading, otherwise the changes will be ignored.

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