Authentication dialog opens when landing on Bamboo login page
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Problem
When you access Bamboo, you see an authentication dialog box that you either have to close or sign in to before logging in to Bamboo
Diagnosis
Environment
Bamboo running on a Microsoft IIS (Internet Information Services) server
Bamboo Anonymous Access disabled
Diagnostic Steps
With your browser Developer Tools open, navigate to the Bamboo login page
You should see a 401 error when the dialog box opens, select it and view the Headers that were received, you should see something like the following:
Server:Microsoft-IIS/7.5Vary:AcceptWWW-Authenticate:NegotiateWWW-Authenticate:NTLM
Cause
This is caused by the following conditions:
Bamboo Anonymous Access is disabled
NT LAN Manager (NTLM) authentication is enabled
Resolution
Option A
If allowing Anonymous user access to Bamboo is an option for your Team, please enable this in Administration >> Overview >> Global permissions.
Option B
If allowing Anonymous user access to Bamboo is not an option for your Team, this dialog can be disabled by disabling NTLM authentication in your web server.
Please see Microsoft TechNet's Configure Windows Authentication (IIS 7) for more information and details on how to complete this.
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