Role of Firewall in QuickBooks Error H303 | |
A misconfigured firewall is one of the primary triggers of QuickBooks Error H303. When the firewall blocks communication between QuickBooks and the server, the company file becomes inaccessible. To resolve this, configure firewall settings to allow QuickBooks ports, add exceptions for its executables, and verify that the Database Server Manager is running. Correcting firewall restrictions helps restore multi-user access and ensures smoother connectivity across devices. | |
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Target State: All States Target City : All Cities Last Update : Sep 08, 2025 4:50 PM Number of Views: 32 | Item Owner : Louis Contact Email: (None) Contact Phone: +1-(855)-955-1942 |
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