Google Domains DDNS Updater

Works well with bash.

This script follows the LSBInitScripts. You can update your IP address every few minutes using cron, or update it at boot time using init.

Installation

Make your host information file first.

init:

# Update IP at runlevel 0 1 2 3 4 5 6 (while booting, rebooting, shutdown, etc.)
$ update-rc.d update-ddns start 90 2 3 4 5 . stop 90 0 1 6 .

cron:

$ crontab -e

# Update IP for every 5 mins
*/5 *    *   *   *   /etc/init.d/update-ddns start

Example of host information file

{
	"amount": 3,
	"host1":
	{
		"hostname": "mysubdomain.mydomain",
		"username": "iVETU0O6r0CTNYdX",
		"password": "XsaMlfmzSU1dRrMg"
	},
	"host2":
	{
		"hostname": "mysubdomain2.mydomain",
		"username": "sUNeCRROUlnYbyDJ",
		"password": "afM95PIqWOGSNHHw"
	},
	"host3":
	{
		"hostname": "mysubdomain3.mydomain",
		"username": "tNCcjHOKHyVnHTg0",
		"password": "GiBeuNrU92JXLd1w"
	}
}

Links

• Google Domains Help - Dynamic DNS