Firewall is on and configured

What

Firewall prevents contact from other computers on the Internet or on your network. Learn more on the Apple Support page.

What if I use other firewalls?

You should have system firewall enabled because other firewalls cannot support stealth mode, which is necessary if you are directly connected to the internet via hotspot or without router, for example. Stealth mode prevents your Mac to be discovered by threat actors scanning the internet for devices.

Time to fix

<1 minute

How to fix

How to turn on Firewall

  • Open System Preferences, click Security & Privacy, then the tab Firewall.
  • Click the lock icon in the bottom-left, then enter the account password.
  • Click Turn On Firewall.

How to enable Stealth mode

  • Open System Preferences, click Security & Privacy, then the tab Firewall.
  • Click the lock icon in the bottom-left, then enter the account password.
  • Click Firewall Options... and then Enable stealth mode.
Firewall Firewall