A step by step tutorial on how to configure the Ubuntu and Mint Uncomplicated Firewall UFW using the command line or with the graphical user interface.
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server to port info: /etc/services
configure file: /etc/ufw/ufw.conf
sudo ufw enable // turn on firewall
sudo ufw disable //turn off firewall
sudo ufw status // current rules
sudo ufw allow 22 //open port 22 to everyone
sudo ufw deny 22 // close port 22 from everyone
sudo ufw allow from 192.168.0.100 // allow 192.168.0.100 to all ports
sudo ufw allow from 192.168.0.100 to any port 22 // allow 192.168.0.100 to 22
sudo apt-get install gufw
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