If you're getting a message that Windows Firewall is blocking QuickBooks, you're not alone. This usually happens after an update or new installation when the firewall doesn't recognize QuickBooks services like QBCFMonitorService.exe. As a result, QuickBooks may not open, won’t connect to the internet, or fails in multi-user mode.

To fix this, open Windows Defender Firewall, go to "Allow an app through firewall", and make sure all QuickBooks-related entries (QuickBooks Database Server Manager, QuickBooks.exe, etc.) are allowed for both Private and Public networks. Also, manually add inbound and outbound rules for ports used by your QuickBooks version (e.g., 8019, 56728–56730).

Or use the QuickBooks Tool Hub > Network Issues tab to automatically detect and fix firewall issues.

After applying these fixes, restart your computer and relaunch QuickBooks. You should now be able to work without interruptions!

?FAQs – Windows Firewall Blocking QuickBooks

Q1: Why does Windows Firewall block QuickBooks?
A1: It blocks QuickBooks when ports or program files aren’t added to the allowed list after installation or an update.

Q2: How do I fix Windows Firewall blocking QuickBooks?
A2: Use QuickBooks Tool Hub's Network Issues tool, or manually allow QuickBooks ports and files in Windows Firewall settings.