@thelma.stanton
Ubuntu comes with a built-in firewall called UFW (Uncomplicated Firewall). Here are the steps to install and configure UFW:
Step 1: Install UFW
You can install UFW using the following command in the terminal:
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sudo apt-get install ufw |
Step 2: Check the status of UFW
Before configuring the firewall, you should check whether it is active or not. You can use the following command to check the status of UFW:
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sudo ufw status verbose |
If UFW is not active, you will see the following message:
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Status: inactive |
Step 3: Configure UFW
You can configure UFW by adding rules to allow or deny incoming and outgoing traffic. Here are some examples of how to configure UFW:
You can also specify a specific IP address or a range of IP addresses to allow or deny traffic. For example, to allow traffic from the IP address 192.168.1.100, you can use the following command:
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sudo ufw allow from 192.168.1.100 |
To deny traffic from the IP address 192.168.1.100, you can use the following command:
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sudo ufw deny from 192.168.1.100 |
Step 4: Enable UFW
Once you have configured UFW, you can enable it using the following command:
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sudo ufw enable |
After enabling UFW, you can check the status again to make sure it is active:
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sudo ufw status verbose |
That's it! You have successfully installed and configured UFW in Ubuntu.