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Ufw flag6/12/2023 So let's say I want to block port number 80 then I'm required to use the following: sudo ufw deny 80 5. If you want to block certain ports (that you should), you can refer to the given command syntax: sudo ufw deny Deny ports through UFW Firewall: ufw deny This means it will only accept ssh connections from specified IPs (192.168.1.7 in my case): 4. Such as if you want to accept connections from specific IP for a particular service, you can also do that.įor example, here, I have allowed 192.168.1.7 to accept connections for SSH: sudo ufw allow from 192.168.1.7 port ssh You can also be more specific with your rules. To allow any port or service, you are required to follow the given command syntax: sudo ufw allow Īnd is where you specify the port number or the name of the service you want to allow through your firewall.įor example, if you want to allow ssh through the firewall, use: sudo ufw allow ssh There are multiple ways to allow ports through the UFW firewall in Ubuntu. Allow ports through UFW Firewall: ufw allow To enable ufw firewall on Ubuntu, all you have to do is execute the following command: sudo ufw enable 3. Enable UFW Firewall: ufw enableĮnabling a firewall may break the ongoing SSH connections. So how are you supposed to activate your firewall? Well, here's how you do it. To check the status of ufw firewall, you will need to append status flag with the ufw command: sudo ufw statusĪnd for new users, ufw must be deactivated. Chek the status of UFW firewall: ufw status You can download the above table as a cheat sheet at the end of this guide. Reject connection from specific port or service.Ĭhange the logging level of the UFW firewall. Shows UFW rules with numbers, which is helpful when you want to remove rules. Get the detailed (verbose) status of the UFW firewall, which also includes logging levels. Here's a quick summary of what I'm going to share in today's guide: CommandĪllow port/service through the UFW firewall.ĭrop the connection from a specific port/service on the UFW firewall. To use any command shown in this tutorial will need superuser privileges.
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