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Diff for /src/usr.bin/ssh/ssh_config.5 between version 1.49.2.1 and 1.49.2.2

version 1.49.2.1, 2005/09/04 18:40:10 version 1.49.2.2, 2006/02/03 02:53:45
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 set to  set to
 .Dq no  .Dq no
 (the default).  (the default).
 These sessions will reuse the master instance's network connection rather  These sessions will try to reuse the master instance's network connection
 than initiating new ones.  rather than initiating new ones, but will fall back to connecting normally
   if the control socket does not exist, or is not listening.
   .Pp
 Setting this to  Setting this to
 .Dq ask  .Dq ask
 will cause  will cause
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 X11 and  X11 and
 .Xr ssh-agent 1  .Xr ssh-agent 1
 forwarding is supported over these multiplexed connections, however the  forwarding is supported over these multiplexed connections, however the
 display and agent fowarded will be the one belonging to the master  display and agent forwarded will be the one belonging to the master
 connection i.e. it is not possible to forward multiple displays or agents.  connection i.e. it is not possible to forward multiple displays or agents.
 .Pp  .Pp
 Two additional options allow for opportunistic multiplexing: try to use a  Two additional options allow for opportunistic multiplexing: try to use a
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 all three of these escape sequences.  all three of these escape sequences.
 This ensures that shared connections are uniquely identified.  This ensures that shared connections are uniquely identified.
 .It Cm DynamicForward  .It Cm DynamicForward
 Specifies that a TCP/IP port on the local machine be forwarded  Specifies that a TCP port on the local machine be forwarded
 over the secure channel, and the application  over the secure channel, and the application
 protocol is then used to determine where to connect to from the  protocol is then used to determine where to connect to from the
 remote machine.  remote machine.
 The argument must be a port number.  .Pp
   The argument must be
   .Sm off
   .Oo Ar bind_address : Oc Ar port .
   .Sm on
   IPv6 addresses can be specified by enclosing addresses in square brackets or
   by using an alternative syntax:
   .Oo Ar bind_address Ns / Oc Ns Ar port .
   By default, the local port is bound in accordance with the
   .Cm GatewayPorts
   setting.
   However, an explicit
   .Ar bind_address
   may be used to bind the connection to a specific address.
   The
   .Ar bind_address
   of
   .Dq localhost
   indicates that the listening port be bound for local use only, while an
   empty address or
   .Sq *
   indicates that the port should be available from all interfaces.
   .Pp
 Currently the SOCKS4 and SOCKS5 protocols are supported, and  Currently the SOCKS4 and SOCKS5 protocols are supported, and
 .Nm ssh  .Nm ssh
 will act as a SOCKS server.  will act as a SOCKS server.
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 Numeric IP addresses are also permitted (both on the command line and in  Numeric IP addresses are also permitted (both on the command line and in
 .Cm HostName  .Cm HostName
 specifications).  specifications).
 .It Cm IdentityFile  
 Specifies a file from which the user's RSA or DSA authentication identity  
 is read.  
 The default is  
 .Pa ~/.ssh/identity  
 for protocol version 1, and  
 .Pa ~/.ssh/id_rsa  
 and  
 .Pa ~/.ssh/id_dsa  
 for protocol version 2.  
 Additionally, any identities represented by the authentication agent  
 will be used for authentication.  
 The file name may use the tilde  
 syntax to refer to a user's home directory.  
 It is possible to have  
 multiple identity files specified in configuration files; all these  
 identities will be tried in sequence.  
 .It Cm IdentitiesOnly  .It Cm IdentitiesOnly
 Specifies that  Specifies that
 .Nm ssh  .Nm ssh
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 .Dq yes  .Dq yes
 or  or
 .Dq no .  .Dq no .
 This option is intented for situations where  This option is intended for situations where
 .Nm ssh-agent  .Nm ssh-agent
 offers many different identities.  offers many different identities.
 The default is  The default is
 .Dq no .  .Dq no .
   .It Cm IdentityFile
   Specifies a file from which the user's RSA or DSA authentication identity
   is read.
   The default is
   .Pa ~/.ssh/identity
   for protocol version 1, and
   .Pa ~/.ssh/id_rsa
   and
   .Pa ~/.ssh/id_dsa
   for protocol version 2.
   Additionally, any identities represented by the authentication agent
   will be used for authentication.
   The file name may use the tilde
   syntax to refer to a user's home directory.
   It is possible to have
   multiple identity files specified in configuration files; all these
   identities will be tried in sequence.
 .It Cm KbdInteractiveDevices  .It Cm KbdInteractiveDevices
 Specifies the list of methods to use in keyboard-interactive authentication.  Specifies the list of methods to use in keyboard-interactive authentication.
 Multiple method names must be comma-separated.  Multiple method names must be comma-separated.
 The default is to use the server specified list.  The default is to use the server specified list.
   .It Cm LocalCommand
   Specifies a command to execute on the local machine after successfully
   connecting to the server.
   The command string extends to the end of the line, and is executed with
   .Pa /bin/sh .
   This directive is ignored unless
   .Cm PermitLocalCommand
   has been enabled.
 .It Cm LocalForward  .It Cm LocalForward
 Specifies that a TCP/IP port on the local machine be forwarded over  Specifies that a TCP port on the local machine be forwarded over
 the secure channel to the specified host and port from the remote machine.  the secure channel to the specified host and port from the remote machine.
 The first argument must be  The first argument must be
 .Sm off  .Sm off
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 .Dq no .  .Dq no .
 The default is  The default is
 .Dq yes .  .Dq yes .
   .It Cm PermitLocalCommand
   Allow local command execution via the
   .Ic LocalCommand
   option or using the
   .Ic !\& Ns Ar command
   escape sequence in
   .Xr ssh 1 .
   The argument must be
   .Dq yes
   or
   .Dq no .
   The default is
   .Dq no .
 .It Cm Port  .It Cm Port
 Specifies the port number to connect on the remote host.  Specifies the port number to connect on the remote host.
 Default is 22.  Default is 22.
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 The default is  The default is
 .Dq yes .  .Dq yes .
 This option applies to protocol version 2 only.  This option applies to protocol version 2 only.
   .It Cm RekeyLimit
   Specifies the maximum amount of data that may be transmitted before the
   session key is renegotiated.
   The argument is the number of bytes, with an optional suffix of
   .Sq K ,
   .Sq M ,
   or
   .Sq G
   to indicate Kilobytes, Megabytes, or Gigabytes, respectively.
   The default is between
   .Dq 1G
   and
   .Dq 4G ,
   depending on the cipher.
   This option applies to protocol version 2 only.
 .It Cm RemoteForward  .It Cm RemoteForward
 Specifies that a TCP/IP port on the remote machine be forwarded over  Specifies that a TCP port on the remote machine be forwarded over
 the secure channel to the specified host and port from the local machine.  the secure channel to the specified host and port from the local machine.
 The first argument must be  The first argument must be
 .Sm off  .Sm off
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 .Cm SendEnv  .Cm SendEnv
 directives.  directives.
 The default is not to send any environment variables.  The default is not to send any environment variables.
 .It Cm ServerAliveInterval  
 Sets a timeout interval in seconds after which if no data has been received  
 from the server,  
 .Nm ssh  
 will send a message through the encrypted  
 channel to request a response from the server.  
 The default  
 is 0, indicating that these messages will not be sent to the server.  
 This option applies to protocol version 2 only.  
 .It Cm ServerAliveCountMax  .It Cm ServerAliveCountMax
 Sets the number of server alive messages (see above) which may be  Sets the number of server alive messages (see below) which may be
 sent without  sent without
 .Nm ssh  .Nm ssh
 receiving any messages back from the server.  receiving any messages back from the server.
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 The default value is 3.  The default value is 3.
 If, for example,  If, for example,
 .Cm ServerAliveInterval  .Cm ServerAliveInterval
 (above) is set to 15, and  (see below) is set to 15, and
 .Cm ServerAliveCountMax  .Cm ServerAliveCountMax
 is left at the default, if the server becomes unresponsive ssh  is left at the default, if the server becomes unresponsive ssh
 will disconnect after approximately 45 seconds.  will disconnect after approximately 45 seconds.
   .It Cm ServerAliveInterval
   Sets a timeout interval in seconds after which if no data has been received
   from the server,
   .Nm ssh
   will send a message through the encrypted
   channel to request a response from the server.
   The default
   is 0, indicating that these messages will not be sent to the server.
   This option applies to protocol version 2 only.
 .It Cm SmartcardDevice  .It Cm SmartcardDevice
 Specifies which smartcard device to use.  Specifies which smartcard device to use.
 The argument to this keyword is the device  The argument to this keyword is the device
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 .Pp  .Pp
 To disable TCP keepalive messages, the value should be set to  To disable TCP keepalive messages, the value should be set to
 .Dq no .  .Dq no .
   .It Cm Tunnel
   Request starting
   .Xr tun 4
   device forwarding between the client and the server.
   This option also allows requesting layer 2 (ethernet)
   instead of layer 3 (point-to-point) tunneling from the server.
   The argument must be
   .Dq yes ,
   .Dq point-to-point ,
   .Dq ethernet
   or
   .Dq no .
   The default is
   .Dq no .
   .It Cm TunnelDevice
   Force a specified
   .Xr tun 4
   device on the client.
   Without this option, the next available device will be used.
 .It Cm UsePrivilegedPort  .It Cm UsePrivilegedPort
 Specifies whether to use a privileged port for outgoing connections.  Specifies whether to use a privileged port for outgoing connections.
 The argument must be  The argument must be
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Removed from v.1.49.2.1  
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  Added in v.1.49.2.2