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Let’s install the ufw firewall and setup a few rules on web-01.Requirements:The requirements below must be applied to web-01 (feel free to do it on lb-01 and web-02, but it won’t be checked)Configure ufw so that it blocks all incoming traffic, except the following TCP ports:22 (SSH)443 (HTTPS SSL)80 (HTTP)Share the ufw commands that you used in your answer file

Question

Let’s install the ufw firewall and setup a few rules on web-01.Requirements:The requirements below must be applied to web-01 (feel free to do it on lb-01 and web-02, but it won’t be checked)Configure ufw so that it blocks all incoming traffic, except the following TCP ports:22 (SSH)443 (HTTPS SSL)80 (HTTP)Share the ufw commands that you used in your answer file

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Solution

To install the ufw firewall on web-01, follow these steps:

Step 1: Open a terminal on web-01.

Step 2: Run the following command to install ufw:

sudo apt-get install ufw

Step 3: Once the installation is complete, enable ufw by running:

sudo ufw enable

Step 4: Set the default incoming policy to deny all traffic:

sudo ufw default deny incoming

Step 5: Allow incoming traffic on TCP ports 22, 443, and 80:

sudo ufw allow 22/tcp
sudo ufw allow 443/tcp
sudo ufw allow 80/tcp

Step 6: Verify the rules by running:

sudo ufw status

You should see the following output:

Status: active

To                         Action      From
--                         ------      ----
22/tcp                     ALLOW       Anywhere
443/tcp                    ALLOW       Anywhere
80/tcp                     ALLOW       Anywhere

These are the ufw commands used to configure the firewall on web-01.

This problem has been solved

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