How to block unauthorized connections or IP addresses from infiltrating a Linux computer?

Question

Any response is appreciated. Thank you. 

Answer 1

You can use firewall  tools like iptables or UFW to block unauthorized connections or IP addresses on a Linux computer  . Configure rules to deny incoming traffic from specific IP addresses.

Answer 2

To block unauthorized connection or IP address from accessing a LInex computer, you can use a firewall.

The most common firewall tool used in linux distributions is iptables, although some distributions might also user firewalled. Here's a basic guide using iptables:

1. Identify the IP address to block.

2. Setup rules with iptables 

     sudo iptables - A INPUT - s<IP_Address> -j DROP

3. Save the iptables rules.

4. Testing.