ufw
Install
sudo apt-get install ufw
//commands sudo ufw allow 22 sudo ufw deny 111
sudo ufw allow from 123.45.67.89 sudo ufw allow from 123.45.67.89 to any port 22 proto tcp
sudo ufw delete allow 80
sudo ufw enable
sudo apt-get install ufw
//commands sudo ufw allow 22 sudo ufw deny 111
sudo ufw allow from 123.45.67.89 sudo ufw allow from 123.45.67.89 to any port 22 proto tcp
sudo ufw delete allow 80
sudo ufw enable