How to view firewall rules in Ubuntu?
To view firewall rules on Ubuntu, you can use the following command:
- Check the IPv4 firewall rules using the iptables command.
sudo iptables -L
- Check the IPv6 firewall rules using the ip6tables command.
sudo ip6tables -L
The above command will display the current firewall rules list, including input, output, and forwarding rules. If there are many firewall rules, you can use the pipe symbol (|) and the grep command to filter out specific rules.
For example, to search for rules containing a specific port number, you can use the following command:
sudo iptables -L | grep 80
If you are using ufw (Uncomplicated Firewall), you can use the following command to view the firewall rules:
sudo ufw status
The command above will display the current status and rules list of the ufw firewall.
Note: The above command needs to be run in a terminal with administrative privileges.
