.\" (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 1.7 2003/03/28 10:11:43 jmc Exp $
+.\" $OpenBSD: ssh_config.5,v 1.16 2003/07/22 13:35:22 markus Exp $
.Dd September 25, 1999
.Dt SSH_CONFIG 5
.Os
.Ar hostname
argument given on the command line (i.e., the name is not converted to
a canonicalized host name before matching).
-.It Cm AFSTokenPassing
-Specifies whether to pass AFS tokens to remote host.
-The argument to this keyword must be
-.Dq yes
-or
-.Dq no .
-This option applies to protocol version 1 only.
+.It Cm AddressFamily
+Specifies which address family to use when connecting.
+Valid arguments are
+.Dq any ,
+.Dq inet
+(Use IPv4 only) or
+.Dq inet6
+(Use IPv6 only.)
.It Cm BatchMode
If set to
.Dq yes ,
The argument must be an integer.
This may be useful in scripts if the connection sometimes fails.
The default is 1.
+.It Cm ConnectTimeout
+Specifies the timeout (in seconds) used when connecting to the ssh
+server, instead of using the default system TCP timeout.
+This value is used only when the target is down or really unreachable,
+not when it refuses the connection.
.It Cm DynamicForward
Specifies that a TCP/IP port on the local machine be forwarded
over the secure channel, and the application
protocol is then used to determine where to connect to from the
remote machine.
The argument must be a port number.
-Currently the SOCKS4 protocol is supported, and
+Currently the SOCKS4 and SOCKS5 protocols are supported, and
.Nm ssh
-will act as a SOCKS4 server.
+will act as a SOCKS server.
Multiple forwardings may be specified, and
additional forwardings can be given on the command line.
Only the superuser can forward privileged ports.
+.It Cm EnableSSHKeysign
+Setting this option to
+.Dq yes
+in the global client configuration file
+.Pa /etc/ssh/ssh_config
+enables the use of the helper program
+.Xr ssh-keysign 8
+during
+.Cm HostbasedAuthentication .
+The argument must be
+.Dq yes
+or
+.Dq no .
+The default is
+.Dq no .
+See
+.Xr ssh-keysign 8
+for more information.
.It Cm EscapeChar
Sets the escape character (default:
.Ql ~ ) .
specifications).
.It Cm IdentityFile
Specifies a file from which the user's RSA or DSA authentication identity
-is read. The default is
+is read.
+The default is
.Pa $HOME/.ssh/identity
for protocol version 1, and
.Pa $HOME/.ssh/id_rsa
.Dq no .
.It Cm KerberosTgtPassing
Specifies whether a Kerberos TGT will be forwarded to the server.
-This will only work if the Kerberos server is actually an AFS kaserver.
The argument to this keyword must be
.Dq yes
or
Default is 22.
.It Cm PreferredAuthentications
Specifies the order in which the client should try protocol 2
-authentication methods. This allows a client to prefer one method (e.g.
+authentication methods.
+This allows a client to prefer one method (e.g.
.Cm keyboard-interactive )
over another method (e.g.
.Cm password )
.Dq yes .
Note that this option applies to protocol version 1 only.
.It Cm SmartcardDevice
-Specifies which smartcard device to use. The argument to this keyword is
-the device
+Specifies which smartcard device to use.
+The argument to this keyword is the device
.Nm ssh
should use to communicate with a smartcard used for storing the user's
-private RSA key. By default, no device is specified and smartcard support
-is not activated.
+private RSA key.
+By default, no device is specified and smartcard support is not activated.
.It Cm StrictHostKeyChecking
If this flag is set to
.Dq yes ,
Specifies a file to use for the user
host key database instead of
.Pa $HOME/.ssh/known_hosts .
+.It Cm VerifyHostKeyDNS
+Specifies whether to verify the remote key using DNS and SSHFP resource
+records.
+The default is
+.Dq no .
+Note that this option applies to protocol version 2 only.
.It Cm XAuthLocation
Specifies the full pathname of the
.Xr xauth 1
for those users who do not have a configuration file.
This file must be world-readable.
.El
+.Sh SEE ALSO
+.Xr ssh 1
.Sh AUTHORS
OpenSSH is a derivative of the original and free
ssh 1.2.12 release by Tatu Ylonen.
created OpenSSH.
Markus Friedl contributed the support for SSH
protocol versions 1.5 and 2.0.
-.Sh SEE ALSO
-.Xr ssh 1