Click Start > Control Panel. Open Windows Firewall. If you have a 3rd-party firewall application, settings should be similar.

In Windows Firewall, you'll need to make program (Add Program...) exceptions for the following:

C:\Program Files\Wasp Technologies\InventoryControl\ InventoryControl.exe

C:\Program Files\Wasp Technologies\InventoryControl\Services\WaspInventoryWindowsService.exe

C:\Program Files\Microsoft SQL Server\90\Shared\sqlbrowser.exe

C:\Program Files\Microsoft SQL Server\MSSQL$WASPDB\Binn\sqlservr.exe

Windows Firewall will also need to (Add Port...) 10004 & 10005.

Downloads:

Windows 8 firewall exceptions for InventoryControl:
https://dl.waspbarcode.com/wasp/supportfiles/kbimages/ic7/windows-8-firewall-exceptions-for-inventorycontrol.pdf

Windows 7 firewall exceptions for InventoryControl:
https://dl.waspbarcode.com/wasp/supportfiles/kbimages/ic7/windows-7-firewall-exceptions-for-inventorycontrol.pdf

Windows XP firewall exceptions for InventoryControl:
https://dl.waspbarcode.com/wasp/supportfiles/kbimages/ic7/windows-xp-firewall-exceptions-for-inventorycontrol.pdf