BIND DNS: Disable Dynamic Updates

To disable dynamic updates in BIND, you can use the allow-update option in the options block of the BIND configuration file (usually named.conf).

The allow-update option specifies which hosts are allowed to update the DNS zone data dynamically, and can be used to disable dynamic updates by specifying an empty list of hosts.

To disable dynamic updates, you can add the following line to the options block of the BIND configuration file:

allow-update {};

This will prevent any host from performing dynamic updates to the DNS zone data.

You can also use the allow-update option to allow dynamic updates from specific hosts or networks.

For example, to allow dynamic updates from the host 192.0.2.1, you can use the following line:

allow-update { 192.0.2.1; };

To allow dynamic updates from the network 192.0.2.0/24, you can use the following line:

allow-update { 192.0.2.0/24; };

Keep in mind that the allow-update option only controls dynamic updates to the DNS zone data. It does not affect other types of updates, such as zone transfers or incremental zone transfers.

For more information about the allow-update option and other options for controlling dynamic updates in BIND, you can consult the BIND documentation and the named.conf man page.