Operating Systems/Linux/Ubuntu/Ubuntu 16.04 LTS/Firewalls

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Why?

Firewalls are critical for secure computer usage as prevent unwanted (and potentially malicious) connections from being made.

UFW

What is it?

UFW, uncomplicated firewall, is the integrated firewall in all versions of Ubuntu 8.04 LTS and later; it has a graphical element (GUFW) that is also available for use.

How to configure

GUI

  1. Press Alt+F2 and run GUFW, pass the authentication check
  2. Turn the status slider to "on"

CLI

  1. open the terminal
  2. sudo ufw enable
  3. you can use ufw -help to find other commands for further customization
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