2.2.1.7 AUTHINFO GENERIC Discovery Message
The NTLM Authentication: NNTP Extension also supports the discovery of supported authentication procedures, as defined in [RFC2980] section 3.1.3. When the AUTHINFO GENERIC command is sent to the NNTP server without an authenticator or arguments, the NNTP server will list available authentication mechanisms using the syntax that is defined in [RFC2980]. The NTLM mechanism is indicated by the string "NTLM", which is returned if NTLM authentication is enabled for the NNTP server.