Ubuntu UFW BLOCK

To block an IP address using UFW (Uncomplicated Firewall) on Ubuntu, follow these steps:

1. Open the terminal on your Ubuntu machine.

2. Check if UFW is installed by running the command:

   sudo ufw status

If it is not installed, install it using the command:

   sudo apt-get install ufw

3. Once UFW is installed, enable it using the command:

   sudo ufw enable

4. To block an IP address, use the command:

   sudo ufw deny from <IP address>

Replace <IP address> with the actual IP address you want to block.

5. Verify that the IP address has been blocked using the command:

   sudo ufw status

The blocked IP address should be listed under "Status: inactive" or "Status: active".

Note: If you want to unblock the IP address later, use the command:

sudo ufw delete deny from <IP address>

Replace <IP address> with the actual IP address you want to unblock.