DOCUMENT:Q279729 06-MAY-2002 [iis] TITLE :Web Pages Not Serving from IIS PRODUCT :Internet Information Server PROD/VER::3.0,4.0,5.0 OPER/SYS: KEYWORDS:kbDSupport kbIIS kbiis300 kbiis400 kbiis500 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Internet Information Server versions 3.0, 4.0 - Microsoft Internet Information Services version 5.0 ------------------------------------------------------------------------------- SYMPTOMS ======== When trying to browse a Web page that is hosted by Internet Information Server/Services, clients may report they are unable to connect. CAUSE ===== Unfortunately, there is no single cause for IIS failing to serve Web pages. Even if network connectivity can be eliminated as the cause, additional information is required to determine the exact reason why clients cannot connect to the server. MORE INFORMATION ================ Because IIS is a complex product that relies on various operating system components, it is important to determine if only certain types of content have stopped being served. Following are two samples that you can use to test the two most common types of content: static HTML (.htm or .html files) and Active Server Pages (ASP) pages (.asp files). To test IIS's ability to serve HTML (static) content, create a file called "Hello.htm" (without the quotation marks) in the content folder for IIS (by default, this is C:\Inetpub\Wwwroot) that contains the sample code listed below, and then request http://localhost/hello.htm from the Web browser that is installed on the IIS server. HTML Test Page If the phrase "Hello World" is displayed below, then HTML pages are serving properly.

Hello World To test IIS's ability to serve ASP (dynamic) content, create a file called "Hello.asp" (without the quotation marks) in the content folder for IIS (by default, C:\Inetpub\Wwwroot), that contains the following sample code, and then request http://localhost/hello.asp from the Web browser that is installed on the IIS server. <% strWrld="Hello World" %> ASP Test Page If the phrase "Hello World" is displayed below, then ASP pages in this Web application are serving properly.

<%=strWrld%> The Hello.htm and Hello.asp samples can also be downloaded. The following file is available for download from the Microsoft Download Center: Hello.exe (http://download.microsoft.com/download/iis50/other/1.0/WIN98MeXP/EN-US/Hello.exe) Release Date: May-17-2001 For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base: Q119591 How to Obtain Microsoft Support Files from Online Services Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. After it is posted, the file is housed on secure servers that prevent any unauthorized changes to the file. The Hello.exe file contains the following files: +-----------------------+ | File Name | Size | +-----------------------+ | Hello.htm | 631 bytes | +-----------------------+ | Hello.asp | 789 bytes | +-----------------------+ Hello.asp Displays Properly: If the phrase "Hello World" is displayed properly on the ASP test page, but another ASP page does not serve properly, the following reasons may apply: - The failing ASP page is running in a separate process from the Web application that is running the Hello.asp test page. Each process (Inetinfo.exe, Mtx.exe, or Dllhost.exe) that is capable of serving ASP pages (or any other Internet Server API application) has its own thread pool, which is separate from the thread pool in other processes. If one process is experiencing blocking (also known as ASP queuing, which occurs when all available threads are in use but additional requests continue to come in), a separate process may continue serving ASP pages properly because it has its own thread pool from which to execute requests. - The failing page is not executing static HTML or ASP content. If the failing page is a Common Gateway Interface (CGI) application, see the following Microsoft Knowledge Base articles for additional information on troubleshooting CGI applications: Q160422 How IIS Launches a CGI Application Q217202 PRB: CGI Applications and IIS OOP Applications May Intermittently Fail If the failing page is executed by an ISAPI application developed by a third-party company, contact that third party for technical support. Hello.asp Does Not Display Properly: - If the phrase "Hello World" is not displayed on the ASP page, it is possible that the ASP threads are queued, blocked, or deadlocked, which requires additional problem-solving that is beyond the scope of this article. - The failing ASP page contains a problem that is preventing IIS from properly serving ASP content (see the thread pool/ASP queuing information earlier in this article). If custom COM objects are in use on any of the pages that are failing, you can try contacting the vendor of those COM objects or the developer of that page for technical support. To determine if COM objects are in use, search for occurrences of "Set" (Microsoft Visual Basic Script) or "var" (Microsoft JScript). If either of those keywords exist, the COM object called is in the parentheses following CreateObject (VBScript or JScript) or ActiveXObject (JScript). Hello.htm Does Not Display Properly: If Hello.htm does not display properly, one of the following reasons may apply: - IIS is not listening on the IP address and port requested by the client. - Networking issues are preventing the client from reaching the server (consider testing with a Web browser on the IIS server). For more information on troubleshooting Web applications, see the following Microsoft Web pages: Debugging Distributed Web Applications http://msdn.microsoft.com/library/techart/windebug.htm Problem Isolation with Web-Based Applications ttp://support.microsoft.com/servicedesks/webcasts/WC070899/WC070899.asp To learn about recommended settings and optimization of IIS, see the following Microsoft Web pages: The Art and Science of Web Server Tuning with Internet Information Services 5.0 http://www.microsoft.com/serviceproviders/whitepapers/tuningIIS.asp Tuning Internet Information Server Performance http://www.microsoft.com/isn/whitepapers/tuningIIS.asp Additional query words: hello ====================================================================== Keywords : kbDSupport kbIIS kbiis300 kbiis400 kbiis500 Technology : kbiisSearch kbiis500 kbiis400 kbiis300 Version : :3.0,4.0,5.0 Issue type : kbprb Solution Type : kbpending ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.