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matrix invertmatrix matrix concatmatrix - matrix invertmatrix put -%%EndSetup -%%Page: (0,1) 1 -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 0.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -/showpage{}def/copypage{}def/erasepage{}def -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 1 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 701 M -(Network Working Group T. Ylonen) s -5 690 M -(Internet-Draft SSH Communications Security Corp) s -5 679 M -(Expires: March 31, 2004 D. Moffat, Editor, Ed.) s -5 668 M -( Sun Microsystems, Inc) s -5 657 M -( Oct 2003) s -5 624 M -( SSH Connection Protocol) s -5 613 M -( draft-ietf-secsh-connect-18.txt) s -5 591 M -(Status of this Memo) s -5 569 M -( This document is an Internet-Draft and is in full conformance with) s -5 558 M -( all provisions of Section 10 of RFC2026.) s -5 536 M -( Internet-Drafts are working documents of the Internet Engineering) s -5 525 M -( Task Force \(IETF\), its areas, and its working groups. Note that other) s -5 514 M -( groups may also distribute working documents as Internet-Drafts.) s -5 492 M -( Internet-Drafts are draft documents valid for a maximum of six months) s -5 481 M -( and may be updated, replaced, or obsoleted by other documents at any) s -5 470 M -( time. It is inappropriate to use Internet-Drafts as reference) s -5 459 M -( material or to cite them other than as "work in progress.") s -5 437 M -( The list of current Internet-Drafts can be accessed at http://) s -5 426 M -( www.ietf.org/ietf/1id-abstracts.txt.) s -5 404 M -( The list of Internet-Draft Shadow Directories can be accessed at) s -5 393 M -( http://www.ietf.org/shadow.html.) s -5 371 M -( This Internet-Draft will expire on March 31, 2004.) s -5 349 M -(Copyright Notice) s -5 327 M -( Copyright \(C\) The Internet Society \(2003\). All Rights Reserved.) s -5 305 M -(Abstract) s -5 283 M -( SSH is a protocol for secure remote login and other secure network) s -5 272 M -( services over an insecure network.) s -5 250 M -( This document describes the SSH Connection Protocol. It provides) s -5 239 M -( interactive login sessions, remote execution of commands, forwarded) s -5 228 M -( TCP/IP connections, and forwarded X11 connections. All of these) s -5 217 M -( channels are multiplexed into a single encrypted tunnel.) s -5 195 M -( The SSH Connection Protocol has been designed to run on top of the) s -5 184 M -( SSH transport layer and user authentication protocols.) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 1]) s -_R -S -PStoPSsaved restore -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 421.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 2 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -(Table of Contents) s -5 668 M -( 1. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 3) s -5 657 M -( 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3) s -5 646 M -( 3. Conventions Used in This Document . . . . . . . . . . . . . 3) s -5 635 M -( 4. Global Requests . . . . . . . . . . . . . . . . . . . . . . 3) s -5 624 M -( 5. Channel Mechanism . . . . . . . . . . . . . . . . . . . . . 4) s -5 613 M -( 5.1 Opening a Channel . . . . . . . . . . . . . . . . . . . . . 4) s -5 602 M -( 5.2 Data Transfer . . . . . . . . . . . . . . . . . . . . . . . 5) s -5 591 M -( 5.3 Closing a Channel . . . . . . . . . . . . . . . . . . . . . 6) s -5 580 M -( 5.4 Channel-Specific Requests . . . . . . . . . . . . . . . . . 7) s -5 569 M -( 6. Interactive Sessions . . . . . . . . . . . . . . . . . . . . 8) s -5 558 M -( 6.1 Opening a Session . . . . . . . . . . . . . . . . . . . . . 8) s -5 547 M -( 6.2 Requesting a Pseudo-Terminal . . . . . . . . . . . . . . . . 8) s -5 536 M -( 6.3 X11 Forwarding . . . . . . . . . . . . . . . . . . . . . . . 9) s -5 525 M -( 6.3.1 Requesting X11 Forwarding . . . . . . . . . . . . . . . . . 9) s -5 514 M -( 6.3.2 X11 Channels . . . . . . . . . . . . . . . . . . . . . . . . 10) s -5 503 M -( 6.4 Environment Variable Passing . . . . . . . . . . . . . . . . 10) s -5 492 M -( 6.5 Starting a Shell or a Command . . . . . . . . . . . . . . . 10) s -5 481 M -( 6.6 Session Data Transfer . . . . . . . . . . . . . . . . . . . 11) s -5 470 M -( 6.7 Window Dimension Change Message . . . . . . . . . . . . . . 12) s -5 459 M -( 6.8 Local Flow Control . . . . . . . . . . . . . . . . . . . . . 12) s -5 448 M -( 6.9 Signals . . . . . . . . . . . . . . . . . . . . . . . . . . 12) s -5 437 M -( 6.10 Returning Exit Status . . . . . . . . . . . . . . . . . . . 13) s -5 426 M -( 7. TCP/IP Port Forwarding . . . . . . . . . . . . . . . . . . . 14) s -5 415 M -( 7.1 Requesting Port Forwarding . . . . . . . . . . . . . . . . . 14) s -5 404 M -( 7.2 TCP/IP Forwarding Channels . . . . . . . . . . . . . . . . . 15) s -5 393 M -( 8. Encoding of Terminal Modes . . . . . . . . . . . . . . . . . 16) s -5 382 M -( 9. Summary of Message Numbers . . . . . . . . . . . . . . . . . 18) s -5 371 M -( 10. Security Considerations . . . . . . . . . . . . . . . . . . 18) s -5 360 M -( 11. iana cONSiderations . . . . . . . . . . . . . . . . . . . . 19) s -5 349 M -( 12. Intellectual Property . . . . . . . . . . . . . . . . . . . 19) s -5 338 M -( Normative References . . . . . . . . . . . . . . . . . . . . 19) s -5 327 M -( Informative References . . . . . . . . . . . . . . . . . . . 20) s -5 316 M -( Authors' Addresses . . . . . . . . . . . . . . . . . . . . . 20) s -5 305 M -( Intellectual Property and Copyright Statements . . . . . . . 21) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 2]) s -_R -S -PStoPSsaved restore -%%Page: (2,3) 2 -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 0.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -/showpage{}def/copypage{}def/erasepage{}def -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 3 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -(1. Contributors) s -5 668 M -( The major original contributors of this document were: Tatu Ylonen,) s -5 657 M -( Tero Kivinen, Timo J. Rinne, Sami Lehtinen \(all of SSH Communications) s -5 646 M -( Security Corp\), and Markku-Juhani O. Saarinen \(University of) s -5 635 M -( Jyvaskyla\)) s -5 613 M -( The document editor is: [email protected]. Comments on this) s -5 602 M -( internet draft should be sent to the IETF SECSH working group,) s -5 591 M -( details at: http://ietf.org/html.charters/secsh-charter.html) s -5 569 M -(2. Introduction) s -5 547 M -( The SSH Connection Protocol has been designed to run on top of the) s -5 536 M -( SSH transport layer and user authentication protocols. It provides) s -5 525 M -( interactive login sessions, remote execution of commands, forwarded) s -5 514 M -( TCP/IP connections, and forwarded X11 connections. The service name) s -5 503 M -( for this protocol is "ssh-connection".) s -5 481 M -( This document should be read only after reading the SSH architecture) s -5 470 M -( document [SSH-ARCH]. This document freely uses terminology and) s -5 459 M -( notation from the architecture document without reference or further) s -5 448 M -( explanation.) s -5 426 M -(3. Conventions Used in This Document) s -5 404 M -( The keywords "MUST", "MUST NOT", "REQUIRED", "SHOULD", "SHOULD NOT",) s -5 393 M -( and "MAY" that appear in this document are to be interpreted as) s -5 382 M -( described in [RFC2119].) s -5 360 M -( The used data types and terminology are specified in the architecture) s -5 349 M -( document [SSH-ARCH].) s -5 327 M -( The architecture document also discusses the algorithm naming) s -5 316 M -( conventions that MUST be used with the SSH protocols.) s -5 294 M -(4. Global Requests) s -5 272 M -( There are several kinds of requests that affect the state of the) s -5 261 M -( remote end "globally", independent of any channels. An example is a) s -5 250 M -( request to start TCP/IP forwarding for a specific port. All such) s -5 239 M -( requests use the following format.) s -5 217 M -( byte SSH_MSG_GLOBAL_REQUEST) s -5 206 M -( string request name \(restricted to US-ASCII\)) s -5 195 M -( boolean want reply) s -5 184 M -( ... request-specific data follows) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 3]) s -_R -S -PStoPSsaved restore -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 421.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 4 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( Request names follow the DNS extensibility naming convention outlined) s -5 679 M -( in [SSH-ARCH].) s -5 657 M -( The recipient will respond to this message with) s -5 646 M -( SSH_MSG_REQUEST_SUCCESS or SSH_MSG_REQUEST_FAILURE if `want reply' is) s -5 635 M -( TRUE.) s -5 613 M -( byte SSH_MSG_REQUEST_SUCCESS) s -5 602 M -( ..... response specific data) s -5 580 M -( Usually the response specific data is non-existent.) s -5 558 M -( If the recipient does not recognize or support the request, it simply) s -5 547 M -( responds with SSH_MSG_REQUEST_FAILURE.) s -5 525 M -( byte SSH_MSG_REQUEST_FAILURE) s -5 492 M -(5. Channel Mechanism) s -5 470 M -( All terminal sessions, forwarded connections, etc. are channels.) s -5 459 M -( Either side may open a channel. Multiple channels are multiplexed) s -5 448 M -( into a single connection.) s -5 426 M -( Channels are identified by numbers at each end. The number referring) s -5 415 M -( to a channel may be different on each side. Requests to open a) s -5 404 M -( channel contain the sender's channel number. Any other) s -5 393 M -( channel-related messages contain the recipient's channel number for) s -5 382 M -( the channel.) s -5 360 M -( Channels are flow-controlled. No data may be sent to a channel until) s -5 349 M -( a message is received to indicate that window space is available.) s -5 327 M -(5.1 Opening a Channel) s -5 305 M -( When either side wishes to open a new channel, it allocates a local) s -5 294 M -( number for the channel. It then sends the following message to the) s -5 283 M -( other side, and includes the local channel number and initial window) s -5 272 M -( size in the message.) s -5 250 M -( byte SSH_MSG_CHANNEL_OPEN) s -5 239 M -( string channel type \(restricted to US-ASCII\)) s -5 228 M -( uint32 sender channel) s -5 217 M -( uint32 initial window size) s -5 206 M -( uint32 maximum packet size) s -5 195 M -( ... channel type specific data follows) s -5 173 M -( The channel type is a name as described in the SSH architecture) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 4]) s -_R -S -PStoPSsaved restore -%%Page: (4,5) 3 -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 0.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -/showpage{}def/copypage{}def/erasepage{}def -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 5 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( document, with similar extension mechanisms. `sender channel' is a) s -5 679 M -( local identifier for the channel used by the sender of this message.) s -5 668 M -( `initial window size' specifies how many bytes of channel data can be) s -5 657 M -( sent to the sender of this message without adjusting the window.) s -5 646 M -( `Maximum packet size' specifies the maximum size of an individual) s -5 635 M -( data packet that can be sent to the sender \(for example, one might) s -5 624 M -( want to use smaller packets for interactive connections to get better) s -5 613 M -( interactive response on slow links\).) s -5 591 M -( The remote side then decides whether it can open the channel, and) s -5 580 M -( responds with either) s -5 558 M -( byte SSH_MSG_CHANNEL_OPEN_CONFIRMATION) s -5 547 M -( uint32 recipient channel) s -5 536 M -( uint32 sender channel) s -5 525 M -( uint32 initial window size) s -5 514 M -( uint32 maximum packet size) s -5 503 M -( ... channel type specific data follows) s -5 481 M -( where `recipient channel' is the channel number given in the original) s -5 470 M -( open request, and `sender channel' is the channel number allocated by) s -5 459 M -( the other side, or) s -5 437 M -( byte SSH_MSG_CHANNEL_OPEN_FAILURE) s -5 426 M -( uint32 recipient channel) s -5 415 M -( uint32 reason code) s -5 404 M -( string additional textual information \(ISO-10646 UTF-8 [RFC2279]\)) s -5 393 M -( string language tag \(as defined in [RFC3066]\)) s -5 371 M -( If the recipient of the SSH_MSG_CHANNEL_OPEN message does not support) s -5 360 M -( the specified channel type, it simply responds with) s -5 349 M -( SSH_MSG_CHANNEL_OPEN_FAILURE. The client MAY show the additional) s -5 338 M -( information to the user. If this is done, the client software should) s -5 327 M -( take the precautions discussed in [SSH-ARCH].) s -5 305 M -( The following reason codes are defined:) s -5 283 M -( #define SSH_OPEN_ADMINISTRATIVELY_PROHIBITED 1) s -5 272 M -( #define SSH_OPEN_CONNECT_FAILED 2) s -5 261 M -( #define SSH_OPEN_UNKNOWN_CHANNEL_TYPE 3) s -5 250 M -( #define SSH_OPEN_RESOURCE_SHORTAGE 4) s -5 217 M -(5.2 Data Transfer) s -5 195 M -( The window size specifies how many bytes the other party can send) s -5 184 M -( before it must wait for the window to be adjusted. Both parties use) s -5 173 M -( the following message to adjust the window.) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 5]) s -_R -S -PStoPSsaved restore -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 421.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 6 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( byte SSH_MSG_CHANNEL_WINDOW_ADJUST) s -5 679 M -( uint32 recipient channel) s -5 668 M -( uint32 bytes to add) s -5 646 M -( After receiving this message, the recipient MAY send the given number) s -5 635 M -( of bytes more than it was previously allowed to send; the window size) s -5 624 M -( is incremented.) s -5 602 M -( Data transfer is done with messages of the following type.) s -5 580 M -( byte SSH_MSG_CHANNEL_DATA) s -5 569 M -( uint32 recipient channel) s -5 558 M -( string data) s -5 536 M -( The maximum amount of data allowed is the current window size. The) s -5 525 M -( window size is decremented by the amount of data sent. Both parties) s -5 514 M -( MAY ignore all extra data sent after the allowed window is empty.) s -5 492 M -( Additionally, some channels can transfer several types of data. An) s -5 481 M -( example of this is stderr data from interactive sessions. Such data) s -5 470 M -( can be passed with SSH_MSG_CHANNEL_EXTENDED_DATA messages, where a) s -5 459 M -( separate integer specifies the type of the data. The available types) s -5 448 M -( and their interpretation depend on the type of the channel.) s -5 426 M -( byte SSH_MSG_CHANNEL_EXTENDED_DATA) s -5 415 M -( uint32 recipient_channel) s -5 404 M -( uint32 data_type_code) s -5 393 M -( string data) s -5 371 M -( Data sent with these messages consumes the same window as ordinary) s -5 360 M -( data.) s -5 338 M -( Currently, only the following type is defined.) s -5 316 M -( #define SSH_EXTENDED_DATA_STDERR 1) s -5 283 M -(5.3 Closing a Channel) s -5 261 M -( When a party will no longer send more data to a channel, it SHOULD) s -5 250 M -( send SSH_MSG_CHANNEL_EOF.) s -5 228 M -( byte SSH_MSG_CHANNEL_EOF) s -5 217 M -( uint32 recipient_channel) s -5 195 M -( No explicit response is sent to this message; however, the) s -5 184 M -( application may send EOF to whatever is at the other end of the) s -5 173 M -( channel. Note that the channel remains open after this message, and) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 6]) s -_R -S -PStoPSsaved restore -%%Page: (6,7) 4 -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 0.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -/showpage{}def/copypage{}def/erasepage{}def -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 7 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( more data may still be sent in the other direction. This message) s -5 679 M -( does not consume window space and can be sent even if no window space) s -5 668 M -( is available.) s -5 646 M -( When either party wishes to terminate the channel, it sends) s -5 635 M -( SSH_MSG_CHANNEL_CLOSE. Upon receiving this message, a party MUST) s -5 624 M -( send back a SSH_MSG_CHANNEL_CLOSE unless it has already sent this) s -5 613 M -( message for the channel. The channel is considered closed for a) s -5 602 M -( party when it has both sent and received SSH_MSG_CHANNEL_CLOSE, and) s -5 591 M -( the party may then reuse the channel number. A party MAY send) s -5 580 M -( SSH_MSG_CHANNEL_CLOSE without having sent or received) s -5 569 M -( SSH_MSG_CHANNEL_EOF.) s -5 547 M -( byte SSH_MSG_CHANNEL_CLOSE) s -5 536 M -( uint32 recipient_channel) s -5 514 M -( This message does not consume window space and can be sent even if no) s -5 503 M -( window space is available.) s -5 481 M -( It is recommended that any data sent before this message is delivered) s -5 470 M -( to the actual destination, if possible.) s -5 448 M -(5.4 Channel-Specific Requests) s -5 426 M -( Many channel types have extensions that are specific to that) s -5 415 M -( particular channel type. An example is requesting a pty \(pseudo) s -5 404 M -( terminal\) for an interactive session.) s -5 382 M -( All channel-specific requests use the following format.) s -5 360 M -( byte SSH_MSG_CHANNEL_REQUEST) s -5 349 M -( uint32 recipient channel) s -5 338 M -( string request type \(restricted to US-ASCII\)) s -5 327 M -( boolean want reply) s -5 316 M -( ... type-specific data) s -5 294 M -( If want reply is FALSE, no response will be sent to the request.) s -5 283 M -( Otherwise, the recipient responds with either SSH_MSG_CHANNEL_SUCCESS) s -5 272 M -( or SSH_MSG_CHANNEL_FAILURE, or request-specific continuation) s -5 261 M -( messages. If the request is not recognized or is not supported for) s -5 250 M -( the channel, SSH_MSG_CHANNEL_FAILURE is returned.) s -5 228 M -( This message does not consume window space and can be sent even if no) s -5 217 M -( window space is available. Request types are local to each channel) s -5 206 M -( type.) s -5 184 M -( The client is allowed to send further messages without waiting for) s -5 173 M -( the response to the request.) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 7]) s -_R -S -PStoPSsaved restore -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 421.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 8 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( request type names follow the DNS extensibility naming convention) s -5 679 M -( outlined in [SSH-ARCH]) s -5 657 M -( byte SSH_MSG_CHANNEL_SUCCESS) s -5 646 M -( uint32 recipient_channel) s -5 613 M -( byte SSH_MSG_CHANNEL_FAILURE) s -5 602 M -( uint32 recipient_channel) s -5 580 M -( These messages do not consume window space and can be sent even if no) s -5 569 M -( window space is available.) s -5 547 M -(6. Interactive Sessions) s -5 525 M -( A session is a remote execution of a program. The program may be a) s -5 514 M -( shell, an application, a system command, or some built-in subsystem.) s -5 503 M -( It may or may not have a tty, and may or may not involve X11) s -5 492 M -( forwarding. Multiple sessions can be active simultaneously.) s -5 470 M -(6.1 Opening a Session) s -5 448 M -( A session is started by sending the following message.) s -5 426 M -( byte SSH_MSG_CHANNEL_OPEN) s -5 415 M -( string "session") s -5 404 M -( uint32 sender channel) s -5 393 M -( uint32 initial window size) s -5 382 M -( uint32 maximum packet size) s -5 360 M -( Client implementations SHOULD reject any session channel open) s -5 349 M -( requests to make it more difficult for a corrupt server to attack the) s -5 338 M -( client.) s -5 316 M -(6.2 Requesting a Pseudo-Terminal) s -5 294 M -( A pseudo-terminal can be allocated for the session by sending the) s -5 283 M -( following message.) s -5 261 M -( byte SSH_MSG_CHANNEL_REQUEST) s -5 250 M -( uint32 recipient_channel) s -5 239 M -( string "pty-req") s -5 228 M -( boolean want_reply) s -5 217 M -( string TERM environment variable value \(e.g., vt100\)) s -5 206 M -( uint32 terminal width, characters \(e.g., 80\)) s -5 195 M -( uint32 terminal height, rows \(e.g., 24\)) s -5 184 M -( uint32 terminal width, pixels \(e.g., 640\)) s -5 173 M -( uint32 terminal height, pixels \(e.g., 480\)) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 8]) s -_R -S -PStoPSsaved restore -%%Page: (8,9) 5 -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 0.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -/showpage{}def/copypage{}def/erasepage{}def -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 9 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( string encoded terminal modes) s -5 668 M -( The encoding of terminal modes is described in Section Encoding of) s -5 657 M -( Terminal Modes \(Section 8\). Zero dimension parameters MUST be) s -5 646 M -( ignored. The character/row dimensions override the pixel dimensions) s -5 635 M -( \(when nonzero\). Pixel dimensions refer to the drawable area of the) s -5 624 M -( window.) s -5 602 M -( The dimension parameters are only informational.) s -5 580 M -( The client SHOULD ignore pty requests.) s -5 558 M -(6.3 X11 Forwarding) s -5 536 M -(6.3.1 Requesting X11 Forwarding) s -5 514 M -( X11 forwarding may be requested for a session by sending) s -5 492 M -( byte SSH_MSG_CHANNEL_REQUEST) s -5 481 M -( uint32 recipient channel) s -5 470 M -( string "x11-req") s -5 459 M -( boolean want reply) s -5 448 M -( boolean single connection) s -5 437 M -( string x11 authentication protocol) s -5 426 M -( string x11 authentication cookie) s -5 415 M -( uint32 x11 screen number) s -5 393 M -( It is recommended that the authentication cookie that is sent be a) s -5 382 M -( fake, random cookie, and that the cookie is checked and replaced by) s -5 371 M -( the real cookie when a connection request is received.) s -5 349 M -( X11 connection forwarding should stop when the session channel is) s -5 338 M -( closed; however, already opened forwardings should not be) s -5 327 M -( automatically closed when the session channel is closed.) s -5 305 M -( If `single connection' is TRUE, only a single connection should be) s -5 294 M -( forwarded. No more connections will be forwarded after the first, or) s -5 283 M -( after the session channel has been closed.) s -5 261 M -( The "x11 authentication protocol" is the name of the X11) s -5 250 M -( authentication method used, e.g. "MIT-MAGIC-COOKIE-1".) s -5 228 M -( The x11 authentication cookie MUST be hexadecimal encoded.) s -5 206 M -( X Protocol is documented in [SCHEIFLER].) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 9]) s -_R -S -PStoPSsaved restore -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 421.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 10 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -(6.3.2 X11 Channels) s -5 668 M -( X11 channels are opened with a channel open request. The resulting) s -5 657 M -( channels are independent of the session, and closing the session) s -5 646 M -( channel does not close the forwarded X11 channels.) s -5 624 M -( byte SSH_MSG_CHANNEL_OPEN) s -5 613 M -( string "x11") s -5 602 M -( uint32 sender channel) s -5 591 M -( uint32 initial window size) s -5 580 M -( uint32 maximum packet size) s -5 569 M -( string originator address \(e.g. "192.168.7.38"\)) s -5 558 M -( uint32 originator port) s -5 536 M -( The recipient should respond with SSH_MSG_CHANNEL_OPEN_CONFIRMATION) s -5 525 M -( or SSH_MSG_CHANNEL_OPEN_FAILURE.) s -5 503 M -( Implementations MUST reject any X11 channel open requests if they) s -5 492 M -( have not requested X11 forwarding.) s -5 470 M -(6.4 Environment Variable Passing) s -5 448 M -( Environment variables may be passed to the shell/command to be) s -5 437 M -( started later. Uncontrolled setting of environment variables in a) s -5 426 M -( privileged process can be a security hazard. It is recommended that) s -5 415 M -( implementations either maintain a list of allowable variable names or) s -5 404 M -( only set environment variables after the server process has dropped) s -5 393 M -( sufficient privileges.) s -5 371 M -( byte SSH_MSG_CHANNEL_REQUEST) s -5 360 M -( uint32 recipient channel) s -5 349 M -( string "env") s -5 338 M -( boolean want reply) s -5 327 M -( string variable name) s -5 316 M -( string variable value) s -5 283 M -(6.5 Starting a Shell or a Command) s -5 261 M -( Once the session has been set up, a program is started at the remote) s -5 250 M -( end. The program can be a shell, an application program or a) s -5 239 M -( subsystem with a host-independent name. Only one of these requests) s -5 228 M -( can succeed per channel.) s -5 206 M -( byte SSH_MSG_CHANNEL_REQUEST) s -5 195 M -( uint32 recipient channel) s -5 184 M -( string "shell") s -5 173 M -( boolean want reply) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 10]) s -_R -S -PStoPSsaved restore -%%Page: (10,11) 6 -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 0.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -/showpage{}def/copypage{}def/erasepage{}def -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 11 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( This message will request the user's default shell \(typically defined) s -5 679 M -( in /etc/passwd in UNIX systems\) to be started at the other end.) s -5 657 M -( byte SSH_MSG_CHANNEL_REQUEST) s -5 646 M -( uint32 recipient channel) s -5 635 M -( string "exec") s -5 624 M -( boolean want reply) s -5 613 M -( string command) s -5 591 M -( This message will request the server to start the execution of the) s -5 580 M -( given command. The command string may contain a path. Normal) s -5 569 M -( precautions MUST be taken to prevent the execution of unauthorized) s -5 558 M -( commands.) s -5 536 M -( byte SSH_MSG_CHANNEL_REQUEST) s -5 525 M -( uint32 recipient channel) s -5 514 M -( string "subsystem") s -5 503 M -( boolean want reply) s -5 492 M -( string subsystem name) s -5 470 M -( This last form executes a predefined subsystem. It is expected that) s -5 459 M -( these will include a general file transfer mechanism, and possibly) s -5 448 M -( other features. Implementations may also allow configuring more such) s -5 437 M -( mechanisms. As the user's shell is usually used to execute the) s -5 426 M -( subsystem, it is advisable for the subsystem protocol to have a) s -5 415 M -( "magic cookie" at the beginning of the protocol transaction to) s -5 404 M -( distinguish it from arbitrary output generated by shell) s -5 393 M -( initialization scripts etc. This spurious output from the shell may) s -5 382 M -( be filtered out either at the server or at the client.) s -5 360 M -( The server SHOULD not halt the execution of the protocol stack when) s -5 349 M -( starting a shell or a program. All input and output from these SHOULD) s -5 338 M -( be redirected to the channel or to the encrypted tunnel.) s -5 316 M -( It is RECOMMENDED to request and check the reply for these messages.) s -5 305 M -( The client SHOULD ignore these messages.) s -5 283 M -( Subsystem names follow the DNS extensibility naming convention) s -5 272 M -( outlined in [SSH-ARCH].) s -5 250 M -(6.6 Session Data Transfer) s -5 228 M -( Data transfer for a session is done using SSH_MSG_CHANNEL_DATA and) s -5 217 M -( SSH_MSG_CHANNEL_EXTENDED_DATA packets and the window mechanism. The) s -5 206 M -( extended data type SSH_EXTENDED_DATA_STDERR has been defined for) s -5 195 M -( stderr data.) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 11]) s -_R -S -PStoPSsaved restore -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 421.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 12 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -(6.7 Window Dimension Change Message) s -5 668 M -( When the window \(terminal\) size changes on the client side, it MAY) s -5 657 M -( send a message to the other side to inform it of the new dimensions.) s -5 635 M -( byte SSH_MSG_CHANNEL_REQUEST) s -5 624 M -( uint32 recipient_channel) s -5 613 M -( string "window-change") s -5 602 M -( boolean FALSE) s -5 591 M -( uint32 terminal width, columns) s -5 580 M -( uint32 terminal height, rows) s -5 569 M -( uint32 terminal width, pixels) s -5 558 M -( uint32 terminal height, pixels) s -5 536 M -( No response SHOULD be sent to this message.) s -5 514 M -(6.8 Local Flow Control) s -5 492 M -( On many systems, it is possible to determine if a pseudo-terminal is) s -5 481 M -( using control-S/control-Q flow control. When flow control is) s -5 470 M -( allowed, it is often desirable to do the flow control at the client) s -5 459 M -( end to speed up responses to user requests. This is facilitated by) s -5 448 M -( the following notification. Initially, the server is responsible for) s -5 437 M -( flow control. \(Here, again, client means the side originating the) s -5 426 M -( session, and server means the other side.\)) s -5 404 M -( The message below is used by the server to inform the client when it) s -5 393 M -( can or cannot perform flow control \(control-S/control-Q processing\).) s -5 382 M -( If `client can do' is TRUE, the client is allowed to do flow control) s -5 371 M -( using control-S and control-Q. The client MAY ignore this message.) s -5 349 M -( byte SSH_MSG_CHANNEL_REQUEST) s -5 338 M -( uint32 recipient channel) s -5 327 M -( string "xon-xoff") s -5 316 M -( boolean FALSE) s -5 305 M -( boolean client can do) s -5 283 M -( No response is sent to this message.) s -5 261 M -(6.9 Signals) s -5 239 M -( A signal can be delivered to the remote process/service using the) s -5 228 M -( following message. Some systems may not implement signals, in which) s -5 217 M -( case they SHOULD ignore this message.) s -5 195 M -( byte SSH_MSG_CHANNEL_REQUEST) s -5 184 M -( uint32 recipient channel) s -5 173 M -( string "signal") s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 12]) s -_R -S -PStoPSsaved restore -%%Page: (12,13) 7 -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 0.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -/showpage{}def/copypage{}def/erasepage{}def -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 13 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( boolean FALSE) s -5 679 M -( string signal name without the "SIG" prefix.) s -5 657 M -( Signal names will be encoded as discussed in the "exit-signal") s -5 646 M -( SSH_MSG_CHANNEL_REQUEST.) s -5 624 M -(6.10 Returning Exit Status) s -5 602 M -( When the command running at the other end terminates, the following) s -5 591 M -( message can be sent to return the exit status of the command.) s -5 580 M -( Returning the status is RECOMMENDED. No acknowledgment is sent for) s -5 569 M -( this message. The channel needs to be closed with) s -5 558 M -( SSH_MSG_CHANNEL_CLOSE after this message.) s -5 536 M -( The client MAY ignore these messages.) s -5 514 M -( byte SSH_MSG_CHANNEL_REQUEST) s -5 503 M -( uint32 recipient_channel) s -5 492 M -( string "exit-status") s -5 481 M -( boolean FALSE) s -5 470 M -( uint32 exit_status) s -5 448 M -( The remote command may also terminate violently due to a signal.) s -5 437 M -( Such a condition can be indicated by the following message. A zero) s -5 426 M -( exit_status usually means that the command terminated successfully.) s -5 404 M -( byte SSH_MSG_CHANNEL_REQUEST) s -5 393 M -( uint32 recipient channel) s -5 382 M -( string "exit-signal") s -5 371 M -( boolean FALSE) s -5 360 M -( string signal name without the "SIG" prefix.) s -5 349 M -( boolean core dumped) s -5 338 M -( string error message \(ISO-10646 UTF-8\)) s -5 327 M -( string language tag \(as defined in [RFC3066]\)) s -5 305 M -( The signal name is one of the following \(these are from [POSIX]\)) s -5 283 M -( ABRT) s -5 272 M -( ALRM) s -5 261 M -( FPE) s -5 250 M -( HUP) s -5 239 M -( ILL) s -5 228 M -( INT) s -5 217 M -( KILL) s -5 206 M -( PIPE) s -5 195 M -( QUIT) s -5 184 M -( SEGV) s -5 173 M -( TERM) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 13]) s -_R -S -PStoPSsaved restore -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 421.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 14 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( USR1) s -5 679 M -( USR2) s -5 657 M -( Additional signal names MAY be sent in the format "sig-name@xyz",) s -5 646 M -( where `sig-name' and `xyz' may be anything a particular implementor) s -5 635 M -( wants \(except the `@' sign\). However, it is suggested that if a) s -5 624 M -( `configure' script is used, the non-standard signal names it finds be) s -5 613 M -( encoded as "[email protected]", where `SIG' is the signal name) s -5 602 M -( without the "SIG" prefix, and `xyz' be the host type, as determined) s -5 591 M -( by `config.guess'.) s -5 569 M -( The `error message' contains an additional explanation of the error) s -5 558 M -( message. The message may consist of multiple lines. The client) s -5 547 M -( software MAY display this message to the user. If this is done, the) s -5 536 M -( client software should take the precautions discussed in [SSH-ARCH].) s -5 514 M -(7. TCP/IP Port Forwarding) s -5 492 M -(7.1 Requesting Port Forwarding) s -5 470 M -( A party need not explicitly request forwardings from its own end to) s -5 459 M -( the other direction. However, if it wishes that connections to a) s -5 448 M -( port on the other side be forwarded to the local side, it must) s -5 437 M -( explicitly request this.) s -5 404 M -( byte SSH_MSG_GLOBAL_REQUEST) s -5 393 M -( string "tcpip-forward") s -5 382 M -( boolean want reply) s -5 371 M -( string address to bind \(e.g. "0.0.0.0"\)) s -5 360 M -( uint32 port number to bind) s -5 338 M -( `Address to bind' and `port number to bind' specify the IP address) s -5 327 M -( and port to which the socket to be listened is bound. The address) s -5 316 M -( should be "0.0.0.0" if connections are allowed from anywhere. \(Note) s -5 305 M -( that the client can still filter connections based on information) s -5 294 M -( passed in the open request.\)) s -5 272 M -( Implementations should only allow forwarding privileged ports if the) s -5 261 M -( user has been authenticated as a privileged user.) s -5 239 M -( Client implementations SHOULD reject these messages; they are) s -5 228 M -( normally only sent by the client.) s -5 195 M -( If a client passes 0 as port number to bind and has want reply TRUE) s -5 184 M -( then the server allocates the next available unprivileged port number) s -5 173 M -( and replies with the following message, otherwise there is no) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 14]) s -_R -S -PStoPSsaved restore -%%Page: (14,15) 8 -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 0.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -/showpage{}def/copypage{}def/erasepage{}def -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 15 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( response specific data.) s -5 657 M -( byte SSH_MSG_GLOBAL_REQUEST_SUCCESS) s -5 646 M -( uint32 port that was bound on the server) s -5 624 M -( A port forwarding can be cancelled with the following message. Note) s -5 613 M -( that channel open requests may be received until a reply to this) s -5 602 M -( message is received.) s -5 580 M -( byte SSH_MSG_GLOBAL_REQUEST) s -5 569 M -( string "cancel-tcpip-forward") s -5 558 M -( boolean want reply) s -5 547 M -( string address_to_bind \(e.g. "127.0.0.1"\)) s -5 536 M -( uint32 port number to bind) s -5 514 M -( Client implementations SHOULD reject these messages; they are) s -5 503 M -( normally only sent by the client.) s -5 481 M -(7.2 TCP/IP Forwarding Channels) s -5 459 M -( When a connection comes to a port for which remote forwarding has) s -5 448 M -( been requested, a channel is opened to forward the port to the other) s -5 437 M -( side.) s -5 415 M -( byte SSH_MSG_CHANNEL_OPEN) s -5 404 M -( string "forwarded-tcpip") s -5 393 M -( uint32 sender channel) s -5 382 M -( uint32 initial window size) s -5 371 M -( uint32 maximum packet size) s -5 360 M -( string address that was connected) s -5 349 M -( uint32 port that was connected) s -5 338 M -( string originator IP address) s -5 327 M -( uint32 originator port) s -5 305 M -( Implementations MUST reject these messages unless they have) s -5 294 M -( previously requested a remote TCP/IP port forwarding with the given) s -5 283 M -( port number.) s -5 261 M -( When a connection comes to a locally forwarded TCP/IP port, the) s -5 250 M -( following packet is sent to the other side. Note that these messages) s -5 239 M -( MAY be sent also for ports for which no forwarding has been) s -5 228 M -( explicitly requested. The receiving side must decide whether to) s -5 217 M -( allow the forwarding.) s -5 195 M -( byte SSH_MSG_CHANNEL_OPEN) s -5 184 M -( string "direct-tcpip") s -5 173 M -( uint32 sender channel) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 15]) s -_R -S -PStoPSsaved restore -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 421.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 16 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( uint32 initial window size) s -5 679 M -( uint32 maximum packet size) s -5 668 M -( string host to connect) s -5 657 M -( uint32 port to connect) s -5 646 M -( string originator IP address) s -5 635 M -( uint32 originator port) s -5 613 M -( `Host to connect' and `port to connect' specify the TCP/IP host and) s -5 602 M -( port where the recipient should connect the channel. `Host to) s -5 591 M -( connect' may be either a domain name or a numeric IP address.) s -5 569 M -( `Originator IP address' is the numeric IP address of the machine) s -5 558 M -( where the connection request comes from, and `originator port' is the) s -5 547 M -( port on the originator host from where the connection came from.) s -5 525 M -( Forwarded TCP/IP channels are independent of any sessions, and) s -5 514 M -( closing a session channel does not in any way imply that forwarded) s -5 503 M -( connections should be closed.) s -5 481 M -( Client implementations SHOULD reject direct TCP/IP open requests for) s -5 470 M -( security reasons.) s -5 448 M -(8. Encoding of Terminal Modes) s -5 426 M -( Terminal modes \(as passed in a pty request\) are encoded into a byte) s -5 415 M -( stream. It is intended that the coding be portable across different) s -5 404 M -( environments.) s -5 382 M -( The tty mode description is a stream of bytes. The stream consists) s -5 371 M -( of opcode-argument pairs. It is terminated by opcode TTY_OP_END \(0\).) s -5 360 M -( Opcodes 1 to 159 have a single uint32 argument. Opcodes 160 to 255) s -5 349 M -( are not yet defined, and cause parsing to stop \(they should only be) s -5 338 M -( used after any other data\).) s -5 316 M -( The client SHOULD put in the stream any modes it knows about, and the) s -5 305 M -( server MAY ignore any modes it does not know about. This allows some) s -5 294 M -( degree of machine-independence, at least between systems that use a) s -5 283 M -( POSIX-like tty interface. The protocol can support other systems as) s -5 272 M -( well, but the client may need to fill reasonable values for a number) s -5 261 M -( of parameters so the server pty gets set to a reasonable mode \(the) s -5 250 M -( server leaves all unspecified mode bits in their default values, and) s -5 239 M -( only some combinations make sense\).) s -5 217 M -( The following opcodes have been defined. The naming of opcodes) s -5 206 M -( mostly follows the POSIX terminal mode flags.) s -5 184 M -( 0 TTY_OP_END Indicates end of options.) s -5 173 M -( 1 VINTR Interrupt character; 255 if none. Similarly for the) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 16]) s -_R -S -PStoPSsaved restore -%%Page: (16,17) 9 -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 0.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -/showpage{}def/copypage{}def/erasepage{}def -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 17 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( other characters. Not all of these characters are) s -5 679 M -( supported on all systems.) s -5 668 M -( 2 VQUIT The quit character \(sends SIGQUIT signal on POSIX) s -5 657 M -( systems\).) s -5 646 M -( 3 VERASE Erase the character to left of the cursor.) s -5 635 M -( 4 VKILL Kill the current input line.) s -5 624 M -( 5 VEOF End-of-file character \(sends EOF from the terminal\).) s -5 613 M -( 6 VEOL End-of-line character in addition to carriage return) s -5 602 M -( and/or linefeed.) s -5 591 M -( 7 VEOL2 Additional end-of-line character.) s -5 580 M -( 8 VSTART Continues paused output \(normally control-Q\).) s -5 569 M -( 9 VSTOP Pauses output \(normally control-S\).) s -5 558 M -( 10 VSUSP Suspends the current program.) s -5 547 M -( 11 VDSUSP Another suspend character.) s -5 536 M -( 12 VREPRINT Reprints the current input line.) s -5 525 M -( 13 VWERASE Erases a word left of cursor.) s -5 514 M -( 14 VLNEXT Enter the next character typed literally, even if it) s -5 503 M -( is a special character) s -5 492 M -( 15 VFLUSH Character to flush output.) s -5 481 M -( 16 VSWTCH Switch to a different shell layer.) s -5 470 M -( 17 VSTATUS Prints system status line \(load, command, pid etc\).) s -5 459 M -( 18 VDISCARD Toggles the flushing of terminal output.) s -5 448 M -( 30 IGNPAR The ignore parity flag. The parameter SHOULD be 0 if) s -5 437 M -( this flag is FALSE set, and 1 if it is TRUE.) s -5 426 M -( 31 PARMRK Mark parity and framing errors.) s -5 415 M -( 32 INPCK Enable checking of parity errors.) s -5 404 M -( 33 ISTRIP Strip 8th bit off characters.) s -5 393 M -( 34 INLCR Map NL into CR on input.) s -5 382 M -( 35 IGNCR Ignore CR on input.) s -5 371 M -( 36 ICRNL Map CR to NL on input.) s -5 360 M -( 37 IUCLC Translate uppercase characters to lowercase.) s -5 349 M -( 38 IXON Enable output flow control.) s -5 338 M -( 39 IXANY Any char will restart after stop.) s -5 327 M -( 40 IXOFF Enable input flow control.) s -5 316 M -( 41 IMAXBEL Ring bell on input queue full.) s -5 305 M -( 50 ISIG Enable signals INTR, QUIT, [D]SUSP.) s -5 294 M -( 51 ICANON Canonicalize input lines.) s -5 283 M -( 52 XCASE Enable input and output of uppercase characters by) s -5 272 M -( preceding their lowercase equivalents with `\\'.) s -5 261 M -( 53 ECHO Enable echoing.) s -5 250 M -( 54 ECHOE Visually erase chars.) s -5 239 M -( 55 ECHOK Kill character discards current line.) s -5 228 M -( 56 ECHONL Echo NL even if ECHO is off.) s -5 217 M -( 57 NOFLSH Don't flush after interrupt.) s -5 206 M -( 58 TOSTOP Stop background jobs from output.) s -5 195 M -( 59 IEXTEN Enable extensions.) s -5 184 M -( 60 ECHOCTL Echo control characters as ^\(Char\).) s -5 173 M -( 61 ECHOKE Visual erase for line kill.) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 17]) s -_R -S -PStoPSsaved restore -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 421.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 18 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( 62 PENDIN Retype pending input.) s -5 679 M -( 70 OPOST Enable output processing.) s -5 668 M -( 71 OLCUC Convert lowercase to uppercase.) s -5 657 M -( 72 ONLCR Map NL to CR-NL.) s -5 646 M -( 73 OCRNL Translate carriage return to newline \(output\).) s -5 635 M -( 74 ONOCR Translate newline to carriage return-newline) s -5 624 M -( \(output\).) s -5 613 M -( 75 ONLRET Newline performs a carriage return \(output\).) s -5 602 M -( 90 CS7 7 bit mode.) s -5 591 M -( 91 CS8 8 bit mode.) s -5 580 M -( 92 PARENB Parity enable.) s -5 569 M -( 93 PARODD Odd parity, else even.) s -5 547 M -( 128 TTY_OP_ISPEED Specifies the input baud rate in bits per second.) s -5 536 M -( 129 TTY_OP_OSPEED Specifies the output baud rate in bits per second.) s -5 503 M -(9. Summary of Message Numbers) s -5 481 M -( #define SSH_MSG_GLOBAL_REQUEST 80) s -5 470 M -( #define SSH_MSG_REQUEST_SUCCESS 81) s -5 459 M -( #define SSH_MSG_REQUEST_FAILURE 82) s -5 448 M -( #define SSH_MSG_CHANNEL_OPEN 90) s -5 437 M -( #define SSH_MSG_CHANNEL_OPEN_CONFIRMATION 91) s -5 426 M -( #define SSH_MSG_CHANNEL_OPEN_FAILURE 92) s -5 415 M -( #define SSH_MSG_CHANNEL_WINDOW_ADJUST 93) s -5 404 M -( #define SSH_MSG_CHANNEL_DATA 94) s -5 393 M -( #define SSH_MSG_CHANNEL_EXTENDED_DATA 95) s -5 382 M -( #define SSH_MSG_CHANNEL_EOF 96) s -5 371 M -( #define SSH_MSG_CHANNEL_CLOSE 97) s -5 360 M -( #define SSH_MSG_CHANNEL_REQUEST 98) s -5 349 M -( #define SSH_MSG_CHANNEL_SUCCESS 99) s -5 338 M -( #define SSH_MSG_CHANNEL_FAILURE 100) s -5 305 M -(10. Security Considerations) s -5 283 M -( This protocol is assumed to run on top of a secure, authenticated) s -5 272 M -( transport. User authentication and protection against network-level) s -5 261 M -( attacks are assumed to be provided by the underlying protocols.) s -5 239 M -( It is RECOMMENDED that implementations disable all the potentially) s -5 228 M -( dangerous features \(e.g. agent forwarding, X11 forwarding, and TCP/IP) s -5 217 M -( forwarding\) if the host key has changed.) s -5 195 M -( Full security considerations for this protocol are provided in) s -5 184 M -( Section 8 of [SSH-ARCH]) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 18]) s -_R -S -PStoPSsaved restore -%%Page: (18,19) 10 -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 0.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -/showpage{}def/copypage{}def/erasepage{}def -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 19 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -(11. iana cONSiderations) s -5 668 M -( This document is part of a set, the IANA considerations for the SSH) s -5 657 M -( protocol as defined in [SSH-ARCH], [SSH-TRANS], [SSH-USERAUTH],) s -5 646 M -( [SSH-CONNECT] are detailed in [SSH-NUMBERS].) s -5 624 M -(12. Intellectual Property) s -5 602 M -( The IETF takes no position regarding the validity or scope of any) s -5 591 M -( intellectual property or other rights that might be claimed to) s -5 580 M -( pertain to the implementation or use of the technology described in) s -5 569 M -( this document or the extent to which any license under such rights) s -5 558 M -( might or might not be available; neither does it represent that it) s -5 547 M -( has made any effort to identify any such rights. Information on the) s -5 536 M -( IETF's procedures with respect to rights in standards-track and) s -5 525 M -( standards-related documentation can be found in BCP-11. Copies of) s -5 514 M -( claims of rights made available for publication and any assurances of) s -5 503 M -( licenses to be made available, or the result of an attempt made to) s -5 492 M -( obtain a general license or permission for the use of such) s -5 481 M -( proprietary rights by implementers or users of this specification can) s -5 470 M -( be obtained from the IETF Secretariat.) s -5 448 M -( The IETF has been notified of intellectual property rights claimed in) s -5 437 M -( regard to some or all of the specification contained in this) s -5 426 M -( document. For more information consult the online list of claimed) s -5 415 M -( rights.) s -5 393 M -(Normative References) s -5 371 M -( [SSH-ARCH]) s -5 360 M -( Ylonen, T., "SSH Protocol Architecture", I-D) s -5 349 M -( draft-ietf-architecture-15.txt, Oct 2003.) s -5 327 M -( [SSH-TRANS]) s -5 316 M -( Ylonen, T., "SSH Transport Layer Protocol", I-D) s -5 305 M -( draft-ietf-transport-17.txt, Oct 2003.) s -5 283 M -( [SSH-USERAUTH]) s -5 272 M -( Ylonen, T., "SSH Authentication Protocol", I-D) s -5 261 M -( draft-ietf-userauth-18.txt, Oct 2003.) s -5 239 M -( [SSH-CONNECT]) s -5 228 M -( Ylonen, T., "SSH Connection Protocol", I-D) s -5 217 M -( draft-ietf-connect-18.txt, Oct 2003.) s -5 195 M -( [SSH-NUMBERS]) s -5 184 M -( Lehtinen, S. and D. Moffat, "SSH Protocol Assigned) s -5 173 M -( Numbers", I-D draft-ietf-secsh-assignednumbers-05.txt, Oct) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 19]) s -_R -S -PStoPSsaved restore -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 421.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 20 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( 2003.) s -5 668 M -( [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate) s -5 657 M -( Requirement Levels", BCP 14, RFC 2119, March 1997.) s -5 635 M -(Informative References) s -5 613 M -( [RFC3066] Alvestrand, H., "Tags for the Identification of) s -5 602 M -( Languages", BCP 47, RFC 3066, January 2001.) s -5 580 M -( [RFC1884] Hinden, R. and S. Deering, "IP Version 6 Addressing) s -5 569 M -( Architecture", RFC 1884, December 1995.) s -5 547 M -( [RFC2279] Yergeau, F., "UTF-8, a transformation format of ISO) s -5 536 M -( 10646", RFC 2279, January 1998.) s -5 514 M -( [SCHEIFLER]) s -5 503 M -( Scheifler, R., "X Window System : The Complete Reference) s -5 492 M -( to Xlib, X Protocol, Icccm, Xlfd, 3rd edition.", Digital) s -5 481 M -( Press ISBN 1555580882, Feburary 1992.) s -5 459 M -( [POSIX] ISO/IEC, 9945-1., "Information technology -- Portable) s -5 448 M -( Operating System Interface \(POSIX\)-Part 1: System) s -5 437 M -( Application Program Interface \(API\) C Language", ANSI/IEE) s -5 426 M -( Std 1003.1, July 1996.) s -5 393 M -(Authors' Addresses) s -5 371 M -( Tatu Ylonen) s -5 360 M -( SSH Communications Security Corp) s -5 349 M -( Fredrikinkatu 42) s -5 338 M -( HELSINKI FIN-00100) s -5 327 M -( Finland) s -5 305 M -( EMail: [email protected]) s -5 272 M -( Darren J. Moffat \(editor\)) s -5 261 M -( Sun Microsystems, Inc) s -5 250 M -( 17 Network Circle) s -5 239 M -( Menlo Park CA 94025) s -5 228 M -( USA) s -5 206 M -( EMail: [email protected]) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 20]) s -_R -S -PStoPSsaved restore -%%Page: (20,21) 11 -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 0.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -/showpage{}def/copypage{}def/erasepage{}def -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 21 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -(Intellectual Property Statement) s -5 668 M -( The IETF takes no position regarding the validity or scope of any) s -5 657 M -( intellectual property or other rights that might be claimed to) s -5 646 M -( pertain to the implementation or use of the technology described in) s -5 635 M -( this document or the extent to which any license under such rights) s -5 624 M -( might or might not be available; neither does it represent that it) s -5 613 M -( has made any effort to identify any such rights. Information on the) s -5 602 M -( IETF's procedures with respect to rights in standards-track and) s -5 591 M -( standards-related documentation can be found in BCP-11. Copies of) s -5 580 M -( claims of rights made available for publication and any assurances of) s -5 569 M -( licenses to be made available, or the result of an attempt made to) s -5 558 M -( obtain a general license or permission for the use of such) s -5 547 M -( proprietary rights by implementors or users of this specification can) s -5 536 M -( be obtained from the IETF Secretariat.) s -5 514 M -( The IETF invites any interested party to bring to its attention any) s -5 503 M -( copyrights, patents or patent applications, or other proprietary) s -5 492 M -( rights which may cover technology that may be required to practice) s -5 481 M -( this standard. Please address the information to the IETF Executive) s -5 470 M -( Director.) s -5 448 M -( The IETF has been notified of intellectual property rights claimed in) s -5 437 M -( regard to some or all of the specification contained in this) s -5 426 M -( document. For more information consult the online list of claimed) s -5 415 M -( rights.) s -5 382 M -(Full Copyright Statement) s -5 360 M -( Copyright \(C\) The Internet Society \(2003\). All Rights Reserved.) s -5 338 M -( This document and translations of it may be copied and furnished to) s -5 327 M -( others, and derivative works that comment on or otherwise explain it) s -5 316 M -( or assist in its implementation may be prepared, copied, published) s -5 305 M -( and distributed, in whole or in part, without restriction of any) s -5 294 M -( kind, provided that the above copyright notice and this paragraph are) s -5 283 M -( included on all such copies and derivative works. However, this) s -5 272 M -( document itself may not be modified in any way, such as by removing) s -5 261 M -( the copyright notice or references to the Internet Society or other) s -5 250 M -( Internet organizations, except as needed for the purpose of) s -5 239 M -( developing Internet standards in which case the procedures for) s -5 228 M -( copyrights defined in the Internet Standards process must be) s -5 217 M -( followed, or as required to translate it into languages other than) s -5 206 M -( English.) s -5 184 M -( The limited permissions granted above are perpetual and will not be) s -5 173 M -( revoked by the Internet Society or its successors or assignees.) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 21]) s -_R -S -PStoPSsaved restore -userdict/PStoPSsaved save put -PStoPSmatrix setmatrix -595.000000 421.271378 translate -90 rotate -0.706651 dup scale -userdict/PStoPSmatrix matrix currentmatrix put -userdict/PStoPSclip{0 0 moveto - 595.000000 0 rlineto 0 842.000000 rlineto -595.000000 0 rlineto - closepath}put initclip -PStoPSxform concat -%%BeginPageSetup -_S -75 0 translate -/pagenum 22 def -/fname () def -/fdir () def -/ftail () def -/user_header_p false def -%%EndPageSetup -5 723 M -(Internet-Draft SSH Connection Protocol Oct 2003) s -5 690 M -( This document and the information contained herein is provided on an) s -5 679 M -( "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING) s -5 668 M -( TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING) s -5 657 M -( BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION) s -5 646 M -( HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF) s -5 635 M -( MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.) s -5 602 M -(Acknowledgment) s -5 580 M -( Funding for the RFC Editor function is currently provided by the) s -5 569 M -( Internet Society.) s -5 129 M -(Ylonen & Moffat, Editor Expires March 31, 2004 [Page 22]) s -_R -S -PStoPSsaved restore -%%Trailer -%%Pages: 22 -%%DocumentNeededResources: font Courier-Bold Courier -%%EOF |