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UFW Firewall: How to Install, Configure, and Use It on Ubuntu/Debian

Since computers are connected to each other, services are growing rapidly, with examples such as email, social media, online shopping, chat, and web conferencing.

However, this connectivity is a double-edged sword, as it also opens the door for malicious activity, including the transmission of viruses, malware, and trojan apps, which can harm computers.

Why You Should Install a Firewall
The Internet, as the largest computer network, is not always filled with good people; therefore, to ensure our computers and servers are safe, we need to protect them.

One essential component for securing computers or servers is a firewall, which, according to Wikipedia, is:

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