ufw

Uncomplicated Firewall. Frontend for iptables aiming to make configuration of a firewall easier.

Install

All systems
curl cmd.cat/ufw.sh
Debian Debian
apt-get install ufw
Ubuntu
apt-get install ufw
Arch Arch Linux
pacman -S ufw
image/svg+xml Kali Linux
apt-get install ufw
Fedora
dnf install ufw
Raspbian
apt-get install ufw

Uncomplicated Firewall. Frontend for iptables aiming to make configuration of a firewall easier.

  • Enable ufw:
    ufw enable
  • Disable ufw:
    ufw disable
  • Show ufw rules, along with their numbers:
    ufw status numbered
  • Allow incoming traffic on port 5432 on this host with a comment identifying the service:
    ufw allow 5432 comment "Service"
  • Allow only TCP traffic from 192.168.0.4 to any address on this host, on port 22:
    ufw allow proto tcp from 192.168.0.4 to any port 22
  • Deny traffic on port 80 on this host:
    ufw deny 80
  • Deny all UDP traffic to port 22:
    ufw deny proto udp from any to any port 22
  • Delete a particular rule. The rule number can be retrieved from the `ufw status numbered` command:
    ufw delete rule_number

© tl;dr; authors and contributors