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 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


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

Linux Firewall