How can I tell what type of authentication a server is using?

authentication kerberos ntlm
Matt picture Matt · Jan 28, 2010 · Viewed 8.5k times · Source

I have to access a web server at http://someserver and it requires some authentication. How can I tell if it is using NTLM, Kerberos or whatever it may be?

Answer

Grant Cermak picture Grant Cermak · Dec 14, 2010

Another way to do this is to look at the first few bytes of the header.

If it starts with Negotiate TlR then you're doing SPNEGO over NTLM

If it starts with Negotiate YII then you're doing SPNEGO over Kerberos.

Grant

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