Symptoms
This article describes how Windows Firewall affects the Microsoft Windows UPnP framework in Microsoft Windows XP Service Pack 2 (SP2). This article also describes the changes that have been made in Windows XP SP2 to minimize these effects.
Note This article is intended for technical users and device manufacturers who are familiar with the UPnP architecture and protocols.
Article ContentsINTRODUCTIONMORE INFORMATIONBackgroundEffects of blocked UPnP portsWindows Firewall enhancements for the UPnP frameworkInstalling and removing UPnP UI componentsManually enable the Windows Firewall exception for the UPnP frameworkUPnP device and control point vendorsAdditional information
Resolution
By default, Windows Firewall is turned on when you install Windows XP SP2. Windows Firewall may have the following effects on the Windows UPnP framework: The UPnP framework may not be able to discover networked UPnP devices.The UPnP framework may not be able to control networked UPnP devices or to send events to and receive events from networked devices.UPnP control points may not be able to discover devices that are hosted on the Windows XP SP2-based computer.