Windows Firewall is Blocking QuickBooks – Best Methods to Unblock It QuickBooks may be blocked by Windows Firewall, which would stop it from connecting to the network or internet. This may result in problems with online services, upgrades, or multi-user mode. Use QuickBooks Tool Hub to automatically correct firewall-related issues, or set up the firewall to permit QuickBooks through inbound and outgoing rules. Carefully adjust the parameters to provide access while maintaining security.If you experience any problems, call the QB support team at 1.855.738.2784 URL :https://enterprisesupportnumber.godaddysites.com/f/windows-firewall-is-blocking-quickbooks-desktop