A basic, IPv6 capable, Python daemon to update Dyn DNS (or other compatible services)

• Python3
• A Dyn account or another compatible provider.

• Git clone this repository
• Change into the cloned directory and install the extra required Python packages

cd detdns
sudo pip3 install -r requirements.txt

• Create a detdns_config.py using the example for syntax, filling in the username, password, and hostname that you'd like to update.
• Run inside a screen session with ./detdns.py or launch from systemd/etc.

If you're running Ubuntu or another distribution that uses systemd and you'd like detdns to run on startup, copy the detdns.service file to your systemd service definition folder. Usually /etc/systemd/system/

sudo cp detdns.service /etc/systemd/system/

Edit the service file and update username to be a low privileged local user that you want to run the script as, and also the path to the script itself. Update systemd and start the daemon

sudo systemctl enable detdns
sudo systemctl --system daemon-reload
sudo service detdns start

Check the daemon is running correctly with service detdns status

• IPv4 address is obtained by calling Dyn's checkip service.
• IPv6 address is obtained by creating a socket to Sprint's 2600:: address. eg. Will fail without a default route.
• members.dyndns.org doesn't have an AAAA record, so requires IPv4 connectivity to update.
• Uses HTTPS unlike some other clients