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Home/ Questions/Q 8441599
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Editorial Team
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Editorial Team
Asked: June 10, 20262026-06-10T08:36:11+00:00 2026-06-10T08:36:11+00:00

I am trying to access a service that is behind Windows Authentication. I thought

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I am trying to access a service that is behind Windows Authentication. I thought I could pass the credentials the way HTTP Basic Authentication credentials are passed, but it’s not working. When I do the following, I get a 401 error, and I am absolutely sure the password is correct.

curl --user username:password http://example.com

Why doesn’t this work?

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  1. Editorial Team
    Editorial Team
    2026-06-10T08:36:13+00:00Added an answer on June 10, 2026 at 8:36 am

    If you are using Windows Authentication, you need to use NTLM:

    curl --ntlm --user username:password http://example.com
    
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