noip.com.md

First you need to install and configure the ddns update client

cd /tmp
wget https://www.noip.com/client/linux/noip-duc-linux.tar.gz
tar xzf noip-duc-linux.tar.gz
sudo mv noip-2.1.9-1 /usr/local/src/
cd /usr/local/src/noip-2.1.9-1
sudo make
sudo make install

As user root I have the following cronjob

@reboot /usr/local/bin/noip2