Opening Ports on Ubuntu Firewall

Ubuntu Linux server comes with a default firewall configuration tool

i-e ufw. With ufw we can easily configure and use firewall rules on

operating system.

Command to check the status of the firewall.

sudo ufw status verbose

Command to start the firewall service and check the status .

sudo ufw enable

To allow incoming tcp packets on port 22.

sudo ufw allow 22/tcp

The command is as follows to open http and

https service ports.

sudo ufw allow http

We can also leverage ufw service to check all the

installed applications.

sudo ufw app list

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