asp.net - Firefox doesn't show authentication prompt with Windows Authentication -


i'm building intranet asp.net web application organization, , want authenticate users using windows authentication. have 2 wcf webhttpbinding-bound self-hosted services. both use webhttpbinding resthttpbinding configuration. 

<webhttpbinding>     <binding name="resthttpbinding">       <security mode="transportcredentialonly">         <transport clientcredentialtype="windows"/>       </security>     </binding>   </webhttpbinding>

my services behave correctly (prompts authentication) on chrome, opera , ie (in latter case - if set logon in user authentication in security settings "prompt user name , password"). in firefox can either use this method allow automatic authentication or same result described in this post: 401 unauthorized , blank page.

i've spent hours on googling , trying different options. can't find way make firefox show me prompt.

i checked how it's happening in sharepoint windows authentication used , in firefox prompt appears , turned out, server response in sharepoint comes header

www-authenticate: ntlm

whereas in case got 401 response 

www-authenticate: negotiate

so changed app.config file:

  <webhttpbinding>     <binding name="resthttpbinding">       <security mode="transportcredentialonly">         <transport clientcredentialtype="ntlm"/>       </security>     </binding>   </webhttpbinding>

and prompt appears.

still it's not solution i'm satisfied with: ntlm said downgrading comparing windows authentication.


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