A common denominator for everything that needs to communicate is that it has to pass through the firewall. Further, many types of malware are used to steal and send information to someone, and simply need to be connected with a so-called “command and control” server that can control their behavior. If a computer is compromised and controlled remotely by a rogue user, that user needs to have an established connection to the computer. It can also be a good way to determine if a computer has been compromised or infected with malware. Communications can be an important part of analyzing if and how a computer has been remote controlled or with whom the computer has shared information. Note: If you get errors, or if the setting won't turn on, you can use the troubleshooter and then try again.Determining with whom and in what way a computer has communicated can be important and interesting in several types of examinations. If there's an app you need to use that's being blocked, you can allow it through the firewall, instead of turning the firewall off. To turn it off, switch the setting to Off. Turning off Microsoft Defender Firewall could make your device (and network, if you have one) more vulnerable to unauthorized access. For more info, contact your administrator. If your device is connected to a network, network policy settings might prevent you from completing these steps.
Under Microsoft Defender Firewall, switch the setting to On. Select the Start button > Settings > Update & Security > Windows Security and then Firewall & network protection. To turn Microsoft Defender Firewall on or off:
It helps protect you from unauthorized access. It's important to have Microsoft Defender Firewall on, even if you already have another firewall on.
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