IBM Support

"The request failed with HTTP status 401: Unauthorized" when launching Controller caused by "Enable Kernel-mode authentication" disabled

Troubleshooting


Problem

User launches Controller. User receives error.

Symptom


An error occurred while trying to access the server

Details:
The request failed with HTTP status 401: Unauthorized

Cause

There are other potential causes for this error.

  • See separate IBM Technote #2004398 for more examples.

This Technote specifically relates to the scenario where the cause is that the Controller application server's website (IIS) has been incorrectly configured to have "Enable Kernel-mode authentication" disabled:

Environment

Controller application server's webserver (IIS) configured to have 'Windows Authentication' enabled.

Resolving The Problem

Enable "Enable Kernel-mode authentication" on the Controller application server.

Steps:
1. Logon to the Controller application server as a Windows administrator
2. Launch IIS Manager
3. Locate the part of the website (typically the 'Default Web Site') where the Windows authentication has been enabled from.
4. Double-click on the section 'Authentication'
5. Highlght "Windows Authentication"
6. Click 'Advanced Settings'
7. Tick the box "Enable Kernel-mode authentication".

[{"Product":{"code":"SS9S6B","label":"IBM Cognos Controller"},"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Component":"Controller","Platform":[{"code":"PF033","label":"Windows"}],"Version":"10.1.1","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
15 June 2018

UID

swg21662742

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