Ubuntu Firewall Setup

- Turn on/off Firewall

$ sudo ufw {enable, disable}

 

- Ports and Protocols Open/Blocking

$ sudo ufw {allow, deny} {port}/{protocol}

ex. sudo ufw allow 80/tcp

ex. sudo ufw deny 80/tcp

 

- Remove Rule

$ sudo ufw delete {allow, deny} {port}/{protocol}

ex. sudo ufw delete allow 8080/tcp

ex. sudo ufw delete deny 8888/tcp

 

- IP Open/Blocking

$ sudo ufw {allow, deny} from {ip}

ex. sudo ufw allow from 10.0.0.1

ex. sudo ufw deny from 10.0.0.4

ex. sudo ufw delete deny from 10.0.0.4

 

- View Status

$ sudo ufw status