In a book I read that we need iptables-persistent. The book was published in 2016.
sudo apt install -y iptables-persistent
Everything installed. No problems so far. If I reboot the computer, iptables is still here.
Then in the book I read:
sudo service iptables-persistent start.
And I get this:
Failed to start iptables-persistent.service: Unit iptables-persistent.service not found.
Could you comment: is it acceptable behavior for Ubuntu 16.04.2?