Microsoft KB Archive/148677

= Error attempting to access IIS using Netscape Navigator 2.0 =

Article ID: 148677

Article Last Modified on 3/31/2006

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APPLIES TO


 * Microsoft Internet Information Server 1.0
 * Microsoft Internet Information Server 2.0
 * Microsoft Internet Information Server 3.0
 * Microsoft Internet Information Server 4.0

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This article was previously published under Q148677



We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx



SYMPTOMS
When you use Netscape Navigator 2.0 to access a Microsoft Internet Information Server using the Windows NT Challenge/Response password authentication, a dialog box appears that requests your user name and password. After you enter the correct user name and password, the following error message appears:

Error: Access is Denied



CAUSE
Netscape Navigator 2.0 does not support the Windows NT Challenge/Response password authentication even though it does prompt you for a user name and password.



RESOLUTION
To resolve this issue, use Basic authentication together with SSL encryption.

Note According to the security issue, we recommend that you encrypt the data be encrypted by using SSL.

Additional query words: prodiis

Keywords: kbnetwork kbprb KB148677

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