DOCUMENT:Q241520 11-JUN-2002 [iis] TITLE :How to Disable WebDAV for IIS 5.0 PRODUCT :Internet Information Server PROD/VER::5.0 OPER/SYS: KEYWORDS:kbiis500 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Internet Information Services version 5.0 ------------------------------------------------------------------------------- SUMMARY ======= Microsoft Internet Information Services (IIS) version 5.0 supports the Distributed Authoring and Versioning (DAV) extensions to the HTTP protocol as defined in RFC 2518. By default, the entire Web space of IIS is capable of responding to WebDAV requests (even though the security settings will not allow publishing by default). This article details the process for disabling WebDAV for an entire IIS 5.0 Web server. MORE INFORMATION ================ Because WebDAV is an extension to the HTTP protocol, the concept of disabling WebDAV verbs is like disabling native HTTP verbs such as GET, POST, and so forth. This article describes the process to use to disable WebDAV for those extreme cases in which a Web administrator does not want any WevDAV functionality at all. Note: WebDAV functionality on an IIS 5.0 Web server is made possible through the Httpext.dll file, which is always installed. Simply renaming Httpext.dll will not work because the new Windows File Protection (WFP) functionality in Windows 2000 prevents the corruption or deletion of certain system files. For more information on WFP, search Windows 2000 Help for "Windows File Protection". WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk. The registry value and necessary file updates were first introduced in the 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: Q311401 Windows 2000 Security Rollup Package 1 (SRP1), January 2002 To completely disable WebDAV including the PUT and DELETE requests, make the following changes in the registry. 1. Start Registry Editor (Regedt32.exe). 2. Locate and click the following key in the registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3SVC\Parameters 3. On the Edit menu, click Add Value, and then add the following registry value: Value name: DisableWebDAV Data type: DWORD Value data: 1 REFERENCES ========== For additional information, click the article number below to view the article in the Microsoft Knowledge Base: Q291845 Malformed WebDAV Request Can Cause IIS to Exhaust CPU Resources Additional query words: iis webdav dav ====================================================================== Keywords : kbiis500 Technology : kbiisSearch kbiis500 Version : :5.0 Issue type : kbinfo ============================================================================= 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.