Article ID: 328728 - View products that this article applies to.
This article was previously published under Q328728
Microsoft Windows Media Services (WMS) and Microsoft Internet Information Services (IIS) can coexist on a computer when you use their default values. By default, WMS does not enable the WMS HTTP Server Control Protocol plug-in. In this manner, IIS can safely bind to port 80 for delivery of Web-based content.
Sometimes it can be useful for WMS to use port 80 to deliver content. For example, if the majority of a content provider's clients are behind a firewall, it can be better to use port 80 for delivery of streaming content, because most firewalls have port 80 opened.
With IIS 6.0, HTTP requests are handled by the Http.sys listener. By default, Http.sys will listen to all requests coming in on port 80 for all IP addresses bound to the computer (except for the loopback address: 127.0.0.1). For WMS to bind to use port 80 for streaming content, you must configure the Http.sys listener so that WMS can listen to the specified IP addresses. If you enable the HTTP Server Control Protocol plug-in without configuring the listener, you may receive the following error:
One usage of each socket address (protocol/network address/port) is permitted. Verify that other services (such as IIS) or applications are not attempting to use the same port and then try to enable the plug-in again.
Error Code: 0xC00D158B
For both IIS and WMS to use port 80, one of the following two conditions must be true:
Important Other applications might make a configuration utility that can change the Http.sys IP listen list. When you restart the Http.sys service the next time, it can bind to port 80 on an address selected by WMS and might cause the control plug-in to go into an error state.
If you are using Microsoft Windows Server 2003 with Service Pack 1 installed, you can also prevent the Http.sys service from capturing all available IP addresses for port 80 by applying the hotfix that is mentioned in the following Microsoft Knowledge Base article:
892847This hotfix lets you set a registry value that makes the Http.sys service listen only to the specific IP addresses that IIS Web sites are configured to use.
(http://support.microsoft.com/kb/892847/ )FIX: IIS 6.0 incorrectly binds to ports when IP addresses are added to the IP inclusion list
For more information about running Windows Media Services v4.1 with IIS 5.0, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/268585/ )Running IIS 5.0 and Windows Media Services with HTTP streaming