The Secure Shell (SSH) Protocol Assigned Numbers
RFC 4250

Network Working Group                                        S. Lehtinen
Request for Comments: 4250              SSH Communications Security Corp
Category: Standards Track                                C. Lonvick, Ed.
                                                     Cisco Systems, Inc.
                                                            January 2006

            The Secure Shell (SSH) Protocol Assigned Numbers

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

   This document defines the instructions to the IANA and the initial
   state of the IANA assigned numbers for the Secure Shell (SSH)
   protocol.  It is intended only for the initialization of the IANA
   registries referenced in the set of SSH documents.

Table of Contents

   1. Introduction ....................................................2
   2. Contributors ....................................................3
   3. Conventions Used in This Document ...............................3
      3.1. RFC 2119 Keywords ..........................................3
      3.2. RFC 2434 Keywords ..........................................3
      3.3. Protocol Fields and Values .................................4
   4. IANA Considerations .............................................5
      4.1. Message Numbers ............................................5
           4.1.1. Conventions .........................................5
           4.1.2. Initial Assignments .................................6
           4.1.3. Future Assignments ..................................6
      4.2. Disconnection Messages Reason Codes and Descriptions .......7
           4.2.1. Conventions .........................................7
           4.2.2. Initial Assignments .................................7
           4.2.3. Future Assignments ..................................8
      4.3. Channel Connection Failure Reason Codes and Descriptions ...8
           4.3.1. Conventions .........................................8
           4.3.2. Initial Assignments .................................8

Lehtinen & Lonvick          Standards Track                     [Page 1]
RFC 4250             SSH Protocol Assigned Numbers          January 2006

           4.3.3. Future Assignments ..................................8
           4.3.4. Notes about the PRIVATE USE Range ...................9
      4.4. Extended Channel Data Transfer data_type_code and Data .....9
           4.4.1. Conventions .........................................9
           4.4.2. Initial Assignments ................................10
           4.4.3. Future Assignments .................................10
      4.5. Pseudo-Terminal Encoded Terminal Modes ....................10
           4.5.1. Conventions ........................................10
           4.5.2. Initial Assignments ................................10
           4.5.3. Future Assignments .................................12
      4.6. Names .....................................................12
           4.6.1. Conventions for Names ..............................13
           4.6.2. Future Assignments of Names ........................13
      4.7. Service Names .............................................13
      4.8. Authentication Method Names ...............................14
      4.9. Connection Protocol Assigned Names ........................14
           4.9.1. Connection Protocol Channel Types ..................14
           4.9.2. Connection Protocol Global Request Names ...........14
           4.9.3. Connection Protocol Channel Request Names ..........15
           4.9.4. Initial Assignment of Signal Names .................15
           4.9.5. Connection Protocol Subsystem Names ................15
      4.10. Key Exchange Method Names ................................16
      4.11. Assigned Algorithm Names .................................16
           4.11.1. Encryption Algorithm Names ........................16
           4.11.2. MAC Algorithm Names ...............................17
           4.11.3. Public Key Algorithm Names ........................17
           4.11.4. Compression Algorithm Names .......................17
   5. Security Considerations ........................................17
   6. References .....................................................18
      6.1. Normative References ......................................18
      6.2. Informative References ....................................18