1 Introduction

Telnet is an application layer protocol, as specified in [RFC854], and is supplemented by various other RFCs (Requests for Comments). The Telnet Authentication Option (as specified in [RFC2941]), specifies the authentication option to the Telnet protocol as a generic method for negotiating an authentication type and mode, including whether encryption is used and whether credentials are forwarded. While the Telnet Authentication Option specifies command and message formats, it does not specify an authentication type. This document specifies how Telnet client software can use the Telnet: NT LAN Manager (NTLM) Authentication Protocol to authenticate itself to a Telnet server.

Sections 1.5, 1.8, 1.9, 2, and 3 of this specification are normative. All other sections and examples in this specification are informative.

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