Firewall UFW#

UFW : uncomplicated Firewall.

  • Get status

    sudo ufw status verbose

  • Enable or disable Firewall

    sudo ufw Enable
sudo ufw disable

  • Open port 502 for TCP packets

    sudo ufw allow 502/tcp

  • Default port for SSH

    sudo allow ssh
sudo deny ssh

  • Open port 3389 to a subnet

    sudo ufw allow from 153.109.5.0/24 to any port 3389

  • View the rules with their number

    sudo ufw status numbered

  • Remove a rule with its number

    sudo ufw delete <rule number>

  • Open a port range to TCP traffic

    sudo ufw allow 58000:60999/tcp

    Note

    With port range, the protocol part (tcp, udp, …) is mandatory.

Linux Firewall