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Kerberos authentication provides a mechanism for mutual authentication between a client and a server on an open network.The three heads of Kerberos comprise the Key Distribution Center (KDC), the client user and the server with the desired service to access. Kerberos authentication: Trust-Third-Party Scheme.
KICKED FROM SERVER STEAM AUTH TICKET FAILED PASSWORD
In the NTLM protocol, the client sends the user name to the server the server generates and sends a challenge to the client the client encrypts that challenge using the user’s password and the client sends a response to the server.If it is a local user account, server validate user's response by looking into the Security Account Manager if domain user account, server forward the response to domain controller for validating and retrive group policy of the user account, then construct an access token and establish a session for the use. NTLM Authentication: Challenge- Response mechanism. When are Kerberos and NTLM are applied when connecting to SQL Server 2005. Requirements for Kerberos and NTLM in SQL Connections.
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In this post, I focus on how NTLM and Kerberos are applied when connecting to SQL Server 2005 and try to explain the design behavor behind several common issues that customers frequently hit.