DOCUMENT:Q297086 11-JUN-2002 [winnt] TITLE :Redirected to Former Site After Web Resource IP Address Changes PRODUCT :Microsoft Windows NT PROD/VER::4.0 OPER/SYS: KEYWORDS:kbenv ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 ------------------------------------------------------------------------------- IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base: Q256986 Description of the Microsoft Windows Registry SUMMARY ======= If the IP address of a Web resource that you access through a proxy server (or an array) is changed, you may be redirected to the former site by the Proxy DNS Cache until the Time To Live (TTL) value of the older, cached entry expires. The default TTL for cached entries is 6 hours (21,600 seconds, hexadecimal: 0x5460). You can modify this value to a minimum of 1 hour by editing the registry. MORE INFORMATION ================ 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 following Registry values affect the Web Proxy service on Proxy Server. To change the default TTL value: 1. Start Registry Editor (Regedt32.exe). 2. Locate the DnsTTLInSecs value under the following key in the registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3Proxy\Parameters 3. On the Edit menu, click DWORD, type "0xe10" (without the quotation marks), and then click OK. 4. Quit Registry Editor. In hexadecimal, the full TTL range is DnsTTLInSecs REG_DWORD 0xE10 - 0x8CA0 3,600 to 36,000 seconds respectively. To clear the cache, stop all proxy services of array members, such as Web Proxy, Winsock Proxy, and Proxy Administrator. Delete the physical folders under the URLCACHE folder on each array member, and then restart the proxy services. Otherwise, you can create a cache filter that avoids caching the DNS named Web resource. After the DNS TTL expires for the cached objects, remove the filter. The filter is global to all array members. Additional query words: ====================================================================== Keywords : kbenv Technology : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 Version : :4.0 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.