System Firewall

Enabling the local firewall can protect your device from unwanted connections initiated by other computers when you're connected to a network.


macOS Instructions:

  1. On your Mac, choose Apple menu  > System Preferences, click Security & Privacy, then click Firewall.
    macOS Security and Privacy settings pane selected on the Firewall settings section.
  2. Click the lock in the bottom left to make changes.
    macOS Security & Privacy firewall settings enabled.
  3. Click Turn On Firewall.


Windows Instructions:

The Microsoft Defender Firewall is enabled by default. Turning off Microsoft Defender Firewall could make your device more vulnerable to unauthorized access. 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.

  1. Select the Start button > Settings > Update & Security > Windows Security and then Firewall & network protection.
    Windows Settings Security window.
  2. Select a network profile: Domain networkPrivate network, or Public network.

    Windows Firewall & network protection window.
  3. Under Microsoft Defender Firewall, switch the setting to On.

    Windows Security preferences with the Microsoft Defender Firewall option highlighted.

This Guide Applies To: