3.2.5.2 Connectionless NTLM

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The server action for connectionless NTLM authentication is similar to that of connection-oriented authentication (section 3.1.5.1). However, the first message sent in connectionless authentication is the CHALLENGE_MESSAGE from the server to the client; there is no client-initiated NEGOTIATE_MESSAGE as in the connection-oriented authentication.

The message processing for connectionless NTLM authentication<70> is as specified in the following sections.