Article ID: 309562
Article Last Modified on 11/21/2006
APPLIES TO
- Microsoft Internet Information Services 5.0
- Microsoft Proxy Server 2.0 Standard Edition
This article was previously published under Q309562
SYMPTOMS
After you install the IIS security patch that is described in Q301625, proxy-to-proxy authentication that is based on NTLM may not work, and the following error message may be generated from a Microsoft Internet Explorer client:
This error message may be generated if you have an array (or chain) of proxy servers, and the servers are configured to use NTLM authentication.
CAUSE
This problem is caused by a regression in one of the security hotfixes in IIS.
WORKAROUND
To work around this problem, do not use the NTLM authentication method between proxy servers in an array or chain.
RESOLUTION
IIS Version 5.0 on Microsoft Windows 2000 Server
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack
The English version of this fix should have the following file attributes or later:
Date Version Size File name --------------------------------------------------------- 10-28-2001 5.0.2195.4555 shp 333,072 Asp.dll 10-28-2001 5.0.2195.3649 shp 299,792 Fscfg.dll 10-28-2001 5.0.2195.4555 shp 8,464 Ftpctrs2.dll 10-28-2001 5.0.2195.4555 shp 6,416 Ftpmib.dll 10-28-2001 5.0.2195.4555 shp 9,488 Httpmib.dll 10-28-2001 5.0.2195.4555 shp 13,584 Infoadmn.dll 10-28-2001 5.0.2195.4555 shp 246,032 Infocomm.dll 10-28-2001 5.0.2195.4555 shp 62,736 Isatq.dll 10-28-2001 5.0.2195.3649 shp 3,584 Spmsg.dll 10-28-2001 5.0.2195.4555 shp 7,440 W3ctrs.dll 10-28-2001 5.0.2195.4560 shp 348,432 W3svc.dll
STATUS
Microsoft has confirmed that this is a problem in Microsoft Internet Information Services 5.0. This problem was first corrected in Windows 2000 Service Pack 3.
MORE INFORMATION
For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:
265173 Datacenter Program and Windows 2000 Datacenter Server Product
For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:
249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes
For additional information on how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:
296861 Use QChain.exe to Install Multiple Hotfixes with One Reboot
Additional query words: kbIISCom
Keywords: kbbug kbfix kbwin2000presp3fix kbqfe kbwin2000sp3fix kbhotfixserver KB309562