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+5 701 M
+(Network Working Group T. Ylonen) s
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+(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
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+(Internet-Draft SSH Connection Protocol Oct 2003) s
+5 690 M
+(Table of Contents) s
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+( 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
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+( 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
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+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
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+( Intellectual Property and Copyright Statements . . . . . . . 21) s
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+(Internet-Draft SSH Connection Protocol Oct 2003) s
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+(1. Contributors) s
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+( The major original contributors of this document were: Tatu Ylonen,) s
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+( Tero Kivinen, Timo J. Rinne, Sami Lehtinen \(all of SSH Communications) s
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+( Security Corp\), and Markku-Juhani O. Saarinen \(University of) s
+5 635 M
+( Jyvaskyla\)) s
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+( The document editor is: [email protected]. Comments on this) s
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+( internet draft should be sent to the IETF SECSH working group,) s
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+( details at: http://ietf.org/html.charters/secsh-charter.html) s
+5 569 M
+(2. Introduction) s
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+( The SSH Connection Protocol has been designed to run on top of the) s
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+( SSH transport layer and user authentication protocols. It provides) s
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+( 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
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+( 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
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+( requests use the following format.) s
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+( byte SSH_MSG_GLOBAL_REQUEST) s
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+( string request name \(restricted to US-ASCII\)) s
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+( boolean want reply) s
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+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
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+( 2003.) s
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+( [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate) s
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+( Requirement Levels", BCP 14, RFC 2119, March 1997.) s
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+(Informative References) s
+5 613 M
+( [RFC3066] Alvestrand, H., "Tags for the Identification of) s
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+( Languages", BCP 47, RFC 3066, January 2001.) s
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+( [RFC1884] Hinden, R. and S. Deering, "IP Version 6 Addressing) s
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+( Architecture", RFC 1884, December 1995.) s
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+( [RFC2279] Yergeau, F., "UTF-8, a transformation format of ISO) s
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+( 10646", RFC 2279, January 1998.) s
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+( [SCHEIFLER]) s
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+( Press ISBN 1555580882, Feburary 1992.) s
+5 459 M
+( [POSIX] ISO/IEC, 9945-1., "Information technology -- Portable) s
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+( Operating System Interface \(POSIX\)-Part 1: System) s
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+( Application Program Interface \(API\) C Language", ANSI/IEE) s
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+( 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
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+( HELSINKI FIN-00100) s
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+( EMail: [email protected]) s
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+(Intellectual Property Statement) s
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+( The IETF takes no position regarding the validity or scope of any) s
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+( claims of rights made available for publication and any assurances of) s
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+( licenses to be made available, or the result of an attempt made to) s
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+( obtain a general license or permission for the use of such) s
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+( The IETF invites any interested party to bring to its attention any) s
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+( rights which may cover technology that may be required to practice) s
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+( rights.) s
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+(Full Copyright Statement) s
+5 360 M
+( Copyright \(C\) The Internet Society \(2003\). All Rights Reserved.) s
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+( This document and translations of it may be copied and furnished to) s
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+( others, and derivative works that comment on or otherwise explain it) s
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+( 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
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+( included on all such copies and derivative works. However, this) s
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+( Internet organizations, except as needed for the purpose of) s
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+( English.) s
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+( "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING) s
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+( TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING) s
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+( HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF) s
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+(Acknowledgment) s
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+( Internet Society.) s
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