You may encounter errors if your firewall blocks Internet access needed for specific QuickBooks programs or files.
Updating your firewall to the latest release may resolve the issue or you may need to manually configure your firewall software.
Intuit does not support or maintain steps on the various internet security programs on the market today. In most cases, you should be fine just adding the ports above to the Windows Firewall. If you still encounter errors opening a file over a network or multi-user problems, you may want to try adding the following executable/directories to your 3rd party virus program.
Make sure TCP is selected and type in the following ports for your year of QuickBooks: (if you have multiple years of QuickBooks installed or will be using, you will need to add each years ports as well in this format: 8019, XXXXX, XXXXX, XXXXX, XXXXX).
Note: If you see Program Files (x86), go there as that means you are on a 64bit OS.
Intuit is unable to supply information for all of the several hundred firewall programs available today, as you will need to refer to the links below on how to configure your 3rd party internet security program. If your Antivirus/Firewall is not listed here, refer to your software's documentation or the software publisher's web site for support.