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Diff for /src/usr.bin/ssh/ssh.1 between version 1.52.2.2 and 1.52.2.3

version 1.52.2.2, 2000/09/01 18:23:23 version 1.52.2.3, 2000/11/08 21:31:23
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 .\"  -*- nroff -*-  .\"  -*- nroff -*-
 .\"  .\"
 .\" ssh.1.in  
 .\"  
 .\" Author: Tatu Ylonen <ylo@cs.hut.fi>  .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
 .\"  
 .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland  .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 .\"                    All rights reserved  .\"                    All rights reserved
 .\"  .\"
 .\" Created: Sat Apr 22 21:55:14 1995 ylo  .\" As far as I am concerned, the code I have written for this software
   .\" can be used freely for any purpose.  Any derived versions of this
   .\" software must be clearly marked as such, and if the derived work is
   .\" incompatible with the protocol description in the RFC file, it must be
   .\" called by a name other than "ssh" or "Secure Shell".
 .\"  .\"
 .\" $Id$  .\" Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
   .\" Copyright (c) 1999 Aaron Campbell. All rights reserved.
   .\" Copyright (c) 1999 Theo de Raadt. All rights reserved.
 .\"  .\"
   .\" Redistribution and use in source and binary forms, with or without
   .\" modification, are permitted provided that the following conditions
   .\" are met:
   .\" 1. Redistributions of source code must retain the above copyright
   .\"    notice, this list of conditions and the following disclaimer.
   .\" 2. Redistributions in binary form must reproduce the above copyright
   .\"    notice, this list of conditions and the following disclaimer in the
   .\"    documentation and/or other materials provided with the distribution.
   .\"
   .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   .\"
   .\" $OpenBSD$
 .Dd September 25, 1999  .Dd September 25, 1999
 .Dt SSH 1  .Dt SSH 1
 .Os  .Os
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 (triple-des) is an encrypt-decrypt-encrypt triple with three different keys.  (triple-des) is an encrypt-decrypt-encrypt triple with three different keys.
 It is presumably more secure than the  It is presumably more secure than the
 .Ar des  .Ar des
 cipher which is no longer supported in  cipher which is no longer fully supported in
 .Nm ssh .  .Nm ssh .
 .Ar blowfish  .Ar blowfish
 is a fast block cipher, it appears very secure and is much faster than  is a fast block cipher, it appears very secure and is much faster than
 .Ar 3des .  .Ar 3des .
 .It Fl c Ar "3des-cbc,blowfish-cbc,arcfour,cast128-cbc"  .It Fl c Ar "3des-cbc,blowfish-cbc,arcfour,cast128-cbc"
 Additionally, for protocol version 2 a comma-separated list of ciphers can  Additionally, for protocol version 2 a comma-separated list of ciphers can
 be specified in order of preference. Protocol version 2 supports  be specified in order of preference.
 3DES, Blowfish and CAST128 in CBC mode and Arcfour.  Protocol version 2 supports 3DES, Blowfish, and CAST128 in CBC mode
   and Arcfour.
 .It Fl e Ar ch|^ch|none  .It Fl e Ar ch|^ch|none
 Sets the escape character for sessions with a pty (default:  Sets the escape character for sessions with a pty (default:
 .Ql ~ ) .  .Ql ~ ) .
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 The verbose mode is also used to display  The verbose mode is also used to display
 .Xr skey 1  .Xr skey 1
 challenges, if the user entered "s/key" as password.  challenges, if the user entered "s/key" as password.
   Multiple -v options increases the verbosity.
   Maximum is 3.
 .It Fl x  .It Fl x
 Disables X11 forwarding.  Disables X11 forwarding.
 .It Fl X  .It Fl X
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 .Dq no ,  .Dq no ,
 the check will not be executed.  the check will not be executed.
 .It Cm Cipher  .It Cm Cipher
 Specifies the cipher to use for encrypting the session.  Specifies the cipher to use for encrypting the session
   in protocol version 1.
 Currently,  Currently,
 .Dq blowfish ,  .Dq blowfish
 and  and
 .Dq 3des  .Dq 3des
 are supported.  are supported.
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 in order of preference.  in order of preference.
 Multiple ciphers must be comma-separated.  Multiple ciphers must be comma-separated.
 The default is  The default is
 .Dq 3des-cbc,blowfish-cbc,arcfour,cast128-cbc .  .Dq 3des-cbc,blowfish-cbc,cast128-cbc,arcfour .
 .It Cm Compression  .It Cm Compression
 Specifies whether to use compression.  Specifies whether to use compression.
 The argument must be  The argument must be
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 program.  program.
 The default is  The default is
 .Pa /usr/X11R6/bin/xauth .  .Pa /usr/X11R6/bin/xauth .
   .El
 .Sh ENVIRONMENT  .Sh ENVIRONMENT
 .Nm  .Nm
 will normally set the following environment variables:  will normally set the following environment variables:
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 .It Pa libcrypto.so.X.1  .It Pa libcrypto.so.X.1
 A version of this library which includes support for the RSA algorithm  A version of this library which includes support for the RSA algorithm
 is required for proper operation.  is required for proper operation.
   .El
 .Sh AUTHOR  .Sh AUTHOR
 OpenSSH  OpenSSH
 is a derivative of the original (free) ssh 1.2.12 release by Tatu Ylonen,  is a derivative of the original (free) ssh 1.2.12 release by Tatu Ylonen,
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  Added in v.1.52.2.3