The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was ''.

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We are facing issue while trying to connect to a third party web service (webmethod) using certificate authentication using C#.NET. When we try the same through Soup UI, after installing client’s chain certificate in JKS (Java Key Store), it is working perfectly.

We are trying to pass the exported PFX certificate using

X509Certificate2(“.pfx file path” , ”password”) or using
objClient.ClientCredentials.ClientCertificate.SetCertificate(StoreLocation.LocalMachine, StoreName.Root, X509FindType.FindBySubjectName, "Certificate");

We are getting below error "The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was ''."
In the diagnostics log we are getting “The remote server returned an error: (401) Unauthorized.”

The same thing works perfectly when the authentication is user name and password instead of SSL.

Request you to kindly help us on this, this is becoming a show stopper for product to go live.

Kindly do the needful.

Posted 14-Dec-14 22:34pm

baalamurugeesant

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Baskaranp · Answer 1 · 2024-01-09T01:06:00

Solution 1

Ensure Anonymous Authentication is enabled and then RESET IIS.

Posted 9-Jan-24 1:06am

Baskaranp

Updated 9-Jan-24 1:07am

v2

Comments

Richard Deeming 9-Jan-24 7:52am

Aside from the fact that this question is over nine years old, the OP clearly did NOT want to disable authentication for their application!