To open an outbound firewall port on Windows 10, use these steps:Ĭlick on Outbound Rules in the left navigation pane. If the app needs a specific outbound port, you can use the same instructions, but instead of selecting Inbound Rules on step 4, you would choose the Outbound Rules options. Open outgoing port in Microsoft Defender Firewall Type a descriptive name for the rule-for example, My Inbound Rule for QuickBooks.Īfter you complete the steps, inbound connections will be allowed for the app through the port you open in the firewall. (Usually, you want to leave this option with the default selections.) Select the network type to apply the rule. (Using the same step, note that you can block the connection.) If you need to specify a port range, you can use a hyphen (-). Quick note: If the app requires multiple ports open, you can type as many as you need as long as you separate each one with a comma (4500,4600,5000). This guide will teach you the steps to open a port to allow an app to communicate outside the network using the built-in firewall on Windows 10. When this happens, you’ll need to manually create a rule to allow them to access the network. 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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