src/usr.bin/ssh/ssh_config.5 - diff

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Diff for /src/usr.bin/ssh/ssh_config.5 between version 1.27 and 1.28

-version 1.27, 2003/12/14 12:37:21
+version 1.28, 2003/12/16 15:49:51
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  The default is
  .Dq yes .
  Note that this option applies to protocol version 1 only.
+ .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
+ Sets the number of server alive messages (see above) which may be
+ sent without
+ .Nm ssh
+ receiving any messages back from the server.
+ If this threshold is reached while server alive messages are being sent,
+ .Nm ssh
+ will disconnect from the server, terminating the session.
+ It is important to note that the use of server alive messages is very
+ different from
+ .Cm TCPKeepAlive
+ (below).
+ The server alive messages are sent through the encrypted channel
+ and therefore will not be spoofable.
+ The TCP keepalive option enabled by
+ .Cm TCPKeepAlive
+ is spoofable.
+ The server alive mechanism is valuable when the client or
+ server depend on knowing when a connection has become inactive.
+ .Pp
+ The default value is 3.
+ If, for example,
+ .Cm ServerAliveInterval
+ (above) is set to 15, and
+ .Cm ServerAliveCountMax
+ is left at the default, if the server becomes unresponsive ssh
+ will disconnect after approximately 45 seconds.
  .It Cm SmartcardDevice
  Specifies which smartcard device to use.
  The argument to this keyword is the device