Ubuntu has opened port ipp 631

1. Realized that my OS Ubuntu has open port 631 ipp (internet printing) $ netstat -a -t tcp localhost
2. Try to delete all printers (cup). $ sudo update-rc.d cups remove // Doesn’t help. Ipp still open
3. It is servise named cups-browsed
4. $ sudo systemctl stop cups-browsed // 631 port still open
5. $ sudo systemctl disable cups-browsed // 631 port still open
6. $ sudo lsof -i tcp:631 // shows that cupsd use 631 port
7. $ service cupsd stop
8. To disable permanently $ chkconfig cupsd off // doesn’t work
9. I have to enable firewall to block everething $ sudo ufw enable
4. I install GUI for firewall $ sudo apt-get install gufw