Permit or block an IP address using ufw on Ubuntu

Yikes! This post is over a year old!
If you think it deserves a rewrite please get in touch or leave a comment.
— Thanks, Ash.

Allow and Deny

For this you’ll need to be logged in to your server as a user with admin privileges.

To permit an IP address to connect to your web server’s port 80 (typically used for web servers) you can use the following command. Substitute the fake IP address for the one that you wish to permit.

sudo ufw allow from 111.222.333.444 to any port 80

To block an IP address from connecting to the same port, you can use:

sudo ufw deny from 111.222.333.444 to any port 80

Manage firewall rules

You can view a list of all firewall rules using this command

sudo ufw status numbered

If you need to delete a rule simply list all rules as above, then use the number of the row to delete

sudo ufw delete [insert-number]