I\'m writing HTTP connection with Kerberos authentication. I have \"HTTP/1.1 401 Unauthorized\". Could you recommend me what I should check? I think there\'s somethink trick, bu
I had the same problem and just found your post. I bookmarked it so I can post an answer when I fixed it. I post a link to my question where someone answered it, so if someone finds this via Google they find the answer:
HttpClient has problem creating the SPN for the AD when the URL has a port.
See my question + answer here: HttpClient check Kerberos secured webpage. NTLM login didn't work