Error message when you try to access streaming media content that is routed through a RealNetworks Helix Proxy server that is located behind ISA Server: "Proxy to origin server connection lost" (907848)

RESOLUTION

ISA Server 2000 hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft ISA Server 2000 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

You must install Microsoft ISA Server 2000 Service Pack 2 (SP2) before you install the hotfix.

Restart requirement

You do not have to restart the computer after you apply the hotfix. However, you must restart the Microsoft Firewall service after you run the script that is described in the "Hotfix installation information" section.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

File name	File version	File size	Date	Time	Platform
Msfpcui.dll	3.0.1200.432	2,760,696	19-Sep-2005	06:25	x86
Strmfltr.dll	3.0.1200.432	69,624	19-Sep-2005	06:25	x86

Hotfix installation information

After you install the hotfix, run the following .vbs script on the ISA Server 2000 server. This script adds "x-real-nullsetup" to the list of recognized Real Time Streaming Protocol (RTSP) transport headers. To do this, follow these steps:

1. Start Notepad.
2. Copy the following text, and then paste it into Notepad.

   Set root = CreateObject("FPC.Root")
   Set MyArray = root.Arrays.GetContainingArray
   Set rtspFilter = MyArray.Extensions.ApplicationFilters.Item("{473ED0E1-6371-4ED2-9F95-A676B66659A2}")
   If rtspFilter is Nothing Then
       Wscript.Echo "RTSP Filter ({473ED0E1-6371-4ED2-9F95-A676B66659A2}) is not installed in array." 
       WScript.Quit
   End If
   ' Get the vendor parameter set that contains the filter's configuration.
   Set vpSet = rtspFilter.VendorParametersSets.Item("{473ED0E1-6371-4ED2-9F95-A676B66659A2}")
   ' Add the required parameter.
   vpSet.Value("RtspTransportList") = "RTP/AVP;UDP,X-REAL-RDT/UDP;UDP,X-REAL-RDT/TCP;TCP,X-PN-TNG/UDP;UDP,X-PN-TNG/TCP;TCP,X-REAL-NULLSETUP;TCP"
   vpSet.Save
   

3. In Notepad, click Save as on the File menu.
4. In the File name box, type ISA_script_name.vbs, and then click Save.
5. Quit Notepad.
6. Copy the ISA_script_name.vbs file to the ISA Server 2000 server.
7. On the ISA Server 2000 server, open a command prompt, and then move to the directory where you copied the script file.
8. Type ISA_script_name.vbs, and then press ENTER.
9. Close the Command Prompt window.
10. In the Services snap-in, restart the Microsoft Firewall service.

ISA Server 2004 service pack information

To resolve this problem, obtain the latest service pack for ISA Server 2004. For more information, click the following article number to view the article in the Microsoft Knowledge Base: After you install ISA Server 2004 Service Pack 2 (SP2), you must run a script on the ISA Server 2004 server. To run the script, follow these steps:

1. Start Notepad.
2. Copy the following text, and then paste it into Notepad.
   
   

   Set root = CreateObject("FPC.Root")
   Set MyArray = root.GetContainingArray
   Set rtspFilter = MyArray.Extensions.ApplicationFilters.Item("{C758F63F-E391-4AD2-AA31-D050D895BA7B}")
   
   If rtspFilter is Nothing Then
       Wscript.Echo "RTSP Filter ({C758F63F-E391-4AD2-AA31-D050D895BA7B}) is not installed in array." 
       WScript.Quit
   End If
   
   ' Get the vendor parameter set that contains the filter's configuration.
   Set vpSet = rtspFilter.VendorParametersSets.Item("{C758F63F-E391-4AD2-AA31-D050D895BA7B}")
   
   ' Add the required parameter.
   vpSet.Value("RtspTransportList") = "RTP/AVP;UDP,X-REAL-RDT/UDP;UDP,X-REAL-RDT/TCP;TCP,X-PN-TNG/UDP;UDP,X-PN-TNG/TCP;TCP,X-REAL-NULLSETUP;TCP"
   vpSet.Save
   

3. In Notepad, click Save as on the File menu.
4. In the File name box, type ISA_script_name.vbs, and then click Save.
5. Quit Notepad.
6. Copy the ISA_script_name.vbs file to the ISA Server 2004 server.
7. On the ISA Server 2004 server, open a command prompt, and then move to the directory where you copied the script file.
8. Type ISA_script_name.vbs, and then press ENTER.
9. Close the Command Prompt window.
10. Click Start, click Run, type Services.msc, and then press Enter.
11. In the Services snap-in, restart the Microsoft Firewall service.