Using dnsupdate

Dynamic DNS update client

usage: dnsupdate [-h] [-f] [config]

Positional arguments:

config

the config file to use

Options:

-f, --force-update
	force an update to occur even if the address has not changed or a service has been disabled

dnsupdate can be run as a cron job or with any other scheduler. A systemd service file (for use with a systemd timer) is included in the root of the repository, but it will have to be manually installed unless you are using the Arch Linux AUR package.

On startup, dnsupdate checks if the addresses for any of the configured services have changed, and if so it will attempt to update them. If an update fails and the service reports that the problem was due to client misconfiguration (such as an incorrect password or hostname), the service will be disabled until the config file is edited.

The -f flag can be used to force the update of all services, even if no addresses have changed or a service is disabled. This flag should not be used as part of the automatic update process because too many update attempts that result in no change will cause some services to ban you.