- (tim) [regress/README.regress] Document ssh-rand-helper issue. ok bal

[openssh.git] / ssh_config.5

diff --git a/ssh_config.5 b/ssh_config.5
index 3aafa4e7d259389bf6e3f6a686c9fa0902a62925..05581ece47c54b596bcf8f6aeb5bc5790d9e7d81 100644 (file)
--- a/ssh_config.5
+++ b/ssh_config.5
@@ -34,7 +34,7 @@
 .\" (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: ssh_config.5,v 1.26 2003/12/09 21:53:37 markus Exp $
+.\" $OpenBSD: ssh_config.5,v 1.29 2004/03/05 10:53:58 markus Exp $
 .Dd September 25, 1999
 .Dt SSH_CONFIG 5
 .Os
@@ -350,9 +350,7 @@ Specifies a file to use for the global
 host key database instead of
 .Pa /etc/ssh/ssh_known_hosts .
 .It Cm GSSAPIAuthentication
-Specifies whether authentication based on GSSAPI may be used, either using
-the result of a successful key exchange, or using GSSAPI user
-authentication.
+Specifies whether user authentication based on GSSAPI is allowed.
 The default is
 .Dq no .
 Note that this option applies to protocol version 2 only.
@@ -408,6 +406,24 @@ 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
+Specifies that
+.Nm ssh
+should only use the authentication identity files configured in the
+.Nm 
+files,
+even if the
+.Nm ssh-agent
+offers more identities.
+The argument to this keyword must be
+.Dq yes
+or
+.Dq no .
+This option is intented for situations where
+.Nm ssh-agent
+offers many different identities.
+The default is
+.Dq no .
 .It Cm LocalForward
 Specifies that a TCP/IP port on the local machine be forwarded over
 the secure channel to the specified host and port from the remote machine.
@@ -554,6 +570,42 @@ running.
 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