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 ports in range 8412:8500:

ufw deny proto {udp} from {any} to {any} port {8412:8500}

Delete a particular rule. The rule number can be retrieved from the `ufw status numbered` command:

ufw delete {rule_number}

> This work is licensed under the Creative Commons Attribution 4.0 International License (CC-BY).

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