This article was previously published under Q252795
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Infrared ports cannot be mapped to a Virtual COM port in Windows 2000.
Windows 2000 does not support virtual serial ports and does not provide a general implementation of IrCOMM to map the ports.
To resolve this problem, either obtain the hotfix referenced in this section or Windows 2000 Security Rollup Package 1 (SRP1). For additional information about SRP1, click the article number below to view the article in the Microsoft Knowledge Base:
311401 Windows 2000 Security Rollup Package 1 (SRP1), January 2002
NOTE: SRP1 includes Irda.sys from this security patch but it does not include the other files as they have nothing to do with this vulnerability. For mobile, Infrared Data Association (IrDA)-enabled phones, obtain the update referenced below which adds IrCOMM modem support to Windows 2000. The IrCOMM modem driver recognizes and installs IrCOMM-enabled cell phones as modems. Furthermore, this implementation only supports computer initiated IrCOMM connections to a phone and not the reverse.
NOTE: This update still does not allow for mapping of infrared ports to a Virtual COM port. The added support is specifically for IrDA-enabled mobile phones. This update makes the IrCOMM support identical to Windows XP. For more information on IrCOMM in Windows XP see the following Microsoft Web site:
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file. The English version of this fix should have the following file attributes or later:
Date Time Version Size File name ------------------------------------------------------- 30-Jul-2001 19:39 5.0.2195.3985 57,296 Irda.sys 16-Jul-2001 20:05 5.0.2195.3865 10,288 Irenum.sys 30-Jul-2001 19:39 79,989 Mdmirmdm.inf 16-Jul-2001 20:05 5.0.2195.3865 20,208 Msircomm.sys
Microsoft has confirmed that this problem may cause a degree of security vulnerability in Windows 2000. This problem was first corrected in Windows 2000 Service Pack 3.
For information on a buffer overflow vulnerability associated with IrDA support in Windows 2000, see the following Microsoft web site:
Windows 2000 does not support virtual serial ports and does not provide a general implementation of IrCOMM to map the ports. There are several reasons for this:
Multiple applications cannot share a virtual serial port. The problem presented here, is that an IrCOMM-based program, such as the Microsoft H/PC Explorer or an IrTran-P-based file transfer program running as a background service can open the single virtual serial port and hold it open until you shut down the computer. No other IrDA program or driver is able to run on that computer. This is true, even though the underlying IrDA protocols provide support to allow multiple programs to wait for incoming connections.
Windows 2000 IrDA connections must be supported by multiple device connections. Windows 2000 supports multiple concurrent adapters and IrDA connections to different devices, and cannot support an API and protocol that uses a single device connection.
Attempting to do IrCOMM would have inherit limitations that would not work through the existing serial API, which would prevent the ability to do full error-correction in the IrDA stack and create unreliable connections.
For more information on IrDa support in Windows 2000 see the following Microsoft Web site: