DOCUMENT:Q261194 06-AUG-2002 [iis] TITLE :Web Services Fail with "IP Address Already in Use" Error Message PRODUCT :Internet Information Server PROD/VER::4.0,5.0 OPER/SYS: KEYWORDS:kbOSWin2000 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Internet Information Server version 4.0 - Microsoft Internet Information Services version 5.0 - Microsoft Internet Information Services version 5.1 ------------------------------------------------------------------------------- SYMPTOMS ======== When you attempt to start the Web service, the following error message occurs: Address already in use. Also, the event log contains the following: Event 115 Source: w3svc Description: Could not bind instance CAUSE ===== Another service or application is listening to or using one of the default TCP ports (80 for http connections, 443 for https connections) that the World Wide Web Publishing Service (W3SVC) needs to bind to. RESOLUTION ========== Disable or uninstall the service or application that is using port 80 or 443, and then retest the Web sites. An example of an application that could have grabbed port 80 is MSProxy or some third party application. In Microsoft Windows XP you can determine the application that is using the port attempting to be used. To do this, issue the following command: "netstat -ano" (without the quotation marks) For additional information, click the article number below to view the article in the Microsoft Knowledge Base: Q281336 How to Determine Which Program Uses or Blocks Specific Transmission Control Protocol Ports NOTE: It may be necessary to restart the computer. Several third-party utilities are available to provide this type of functionality in Windows 2000 and Windows NT: FoundStone FPort: http://www.foundstone.com/rdlabs/termsofuse.php?filename=FPortNG.zip (http://www.foundstone.com/rdlabs/termsofuse.php?filename=FPortNG.zip) Active Ports (APORTS): http://www.ntutility.com/freeware.html NTSecurity.nu Inzider: http://www.ntsecurity.nu/toolbox/inzider/ (http://www.ntsecurity.nu/toolbox/inzider/) Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information. MORE INFORMATION ================ To determine which ports are being listened to by other services or applications, first stop the IISADMIN service, and then type "netstat -an" (without the quotation marks) at the command prompt. NOTE: If this error message occurs immediately after you install IIS 5.0 over IIS 4.0, removing and then reinstalling the TCP/IP protocol from Windows may reset the TCP port registry entries to the default values, allowing the IIS 5.0 Web service to work again. However, be aware that doing so may prevent the other service or application using port 80 or 443 from operating properly. Additional query words: iis 5 ssl 3rd-party third-party akz ====================================================================== Keywords : kbOSWin2000 Technology : kbiisSearch kbiis500 kbiis400 kbiis510 Version : :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.