Sometimes well-known applications (for example, SQL Server and QuickBooks) will not work as expected because they’re getting blocked by the Microsoft Defender Firewall. You’ll see a prompt to identify and grant or deny permission if it can’t find a rule. 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. On Windows 10, the built-in firewall (also known as the “Microsoft Defender Firewall” or “Windows Firewall”) is a powerful feature that protects your computer and data from threats from outside trying to get in and from those inside trying to get out.Ī firewall works as a gatekeeper and blocks all unnecessary network ports. Continue selecting the protocol, and the port number to open on Windows 10, allow the connection, choose the network profile to apply the rules, and save the changes.
Then click on “Inbound Rules” or “Outbound Rules,” click on “New Rule,” and select the “Port” option.To open a Windows firewall port, open the “Windows Defender Firewall with Advanced Security” console.
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