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1 Introduction

The NT LAN Manager (NTLM) Authentication: Network News Transfer Protocol (NNTP) Extension specifies the use of NTLM authentication by NNTP to facilitate client authentication to an NNTP server. For more information about NTLM authentication, see [MS-NLMP].

NNTP specifies a protocol for the distribution, inquiry, retrieval, and posting of news articles by using a reliable stream-based transmission of news. For a detailed definition of NNTP, see [RFC977].

This extension uses the NNTP AUTHINFO GENERIC command and NNTP response codes to negotiate NTLM authentication and send authentication data. The NNTP AUTHINFO GENERIC command is specified in [RFC2980] section 3.1.3.

Sections 1.8, 2, and 3 of this specification are normative and can contain the terms MAY, SHOULD, MUST, MUST NOT, and SHOULD NOT as defined in RFC 2119. Sections 1.5 and 1.9 are also normative but cannot contain those terms. All other sections and examples in this specification are informative.

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