When this happens you’ll need to create a rule to allow them access to the network manually. Sometimes well-known applications (for example, SQL Server and QuickBooks) will not work properly because they’re getting blocked by the Microsoft Defender Firewall.
If it can’t find a rule, you’ll see a prompt to identify and grant or deny permission. On Windows 10, the built-in firewall (also known as the “Microsoft Defender Firewall”) is a powerful feature that has been designed to protect your device and data from different threats from outside trying to get in as well as threats from inside trying to get out.Ī firewall basically works as a gatekeeper and blocks all unnecessary network ports, and every time an app or service tries to communicate outside your device, it checks if there’s a specific rule in the database to allow or deny network access.