drop support for old external-keyx and gssapi methods

[gssapi-openssh.git] / openssh / ssh_config.5

diff --git a/openssh/ssh_config.5 b/openssh/ssh_config.5
index 95af3976a9746fcd207f9408e651a007b357c015..7f4f1dda93fe4d1401407570f3636b64a3ad2469 100644 (file)
--- a/openssh/ssh_config.5
+++ b/openssh/ssh_config.5
@@ -34,8 +34,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
 .\" (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 1.102 2007/08/15 12:13:41 stevesk Exp $
-.Dd $Mdocdate: August 15 2007 $
+.\" $OpenBSD: ssh_config.5,v 1.119 2009/02/22 23:50:57 djm Exp $
+.Dd $Mdocdate: February 22 2009 $

 .Dt SSH_CONFIG 5
 .Os
 .Sh NAME
 .Dt SSH_CONFIG 5
 .Os
 .Sh NAME


@@ -56,6 +56,12 @@ command-line options
 user's configuration file
 .Pq Pa ~/.ssh/config
 .It
 user's configuration file
 .Pq Pa ~/.ssh/config
 .It

+GSSAPI configuration file
+.Pq Pa $HOME/.ssh/config.gssapi
+.It
+Kerberos configuration file
+.Pq Pa $HOME/.ssh/config.krb
+.It

 system-wide configuration file
 .Pq Pa /etc/ssh/ssh_config
 .El
 system-wide configuration file
 .Pq Pa /etc/ssh/ssh_config
 .El


@@ -103,6 +109,7 @@ Restricts the following declarations (up to the next
 .Cm Host
 keyword) to be only for those hosts that match one of the patterns
 given after the keyword.
 .Cm Host
 keyword) to be only for those hosts that match one of the patterns
 given after the keyword.

+If more than one pattern is provided, they should be separated by whitespace.

 A single
 .Ql *
 as a pattern can be used to provide global
 A single
 .Ql *
 as a pattern can be used to provide global


@@ -203,9 +210,9 @@ and
 .Dq cast128-cbc .
 The default is:
 .Bd -literal -offset 3n
 .Dq cast128-cbc .
 The default is:
 .Bd -literal -offset 3n

-aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,
-arcfour256,arcfour,aes192-cbc,aes256-cbc,aes128-ctr,
-aes192-ctr,aes256-ctr
+aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,
+aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,
+aes256-cbc,arcfour

 .Ed
 .It Cm ClearAllForwardings
 Specifies that all local, remote, and dynamic port forwardings
 .Ed
 .It Cm ClearAllForwardings
 Specifies that all local, remote, and dynamic port forwardings


@@ -475,13 +482,40 @@ host key database instead of
 .It Cm GSSAPIAuthentication
 Specifies whether user authentication based on GSSAPI is allowed.
 The default is
 .It Cm GSSAPIAuthentication
 Specifies whether user authentication based on GSSAPI is allowed.
 The default is

-.Dq no .
+.Dq yes .
+Note that this option applies to protocol version 2 only.
+.It Cm GSSAPIKeyExchange
+Specifies whether key exchange based on GSSAPI may be used. When using
+GSSAPI key exchange the server need not have a host key.
+The default is
+.Dq yes .

 Note that this option applies to protocol version 2 only.
 Note that this option applies to protocol version 2 only.

+.It Cm GSSAPIClientIdentity
+If set, specifies the GSSAPI client identity that ssh should use when 
+connecting to the server. The default is unset, which means that the default 
+identity will be used.

 .It Cm GSSAPIDelegateCredentials
 Forward (delegate) credentials to the server.
 The default is
 .It Cm GSSAPIDelegateCredentials
 Forward (delegate) credentials to the server.
 The default is

-.Dq no .
-Note that this option applies to protocol version 2 only.
+.Dq yes .
+Note that this option applies to protocol version 2 connections using GSSAPI.
+.It Cm GSSAPIRenewalForcesRekey
+If set to 
+.Dq yes
+then renewal of the client's GSSAPI credentials will force the rekeying of the
+ssh connection. With a compatible server, this can delegate the renewed 
+credentials to a session on the server.
+The default is
+.Dq yes .
+.It Cm GSSAPITrustDns
+Set to 
+.Dq yes to indicate that the DNS is trusted to securely canonicalize
+the name of the host being connected to. If 
+.Dq no, the hostname entered on the
+command line will be passed untouched to the GSSAPI library.
+The default is
+.Dq yes .
+This option only applies to protocol version 2 connections using GSSAPI.

 .It Cm HashKnownHosts
 Indicates that
 .Xr ssh 1
 .It Cm HashKnownHosts
 Indicates that
 .Xr ssh 1


@@ -576,6 +610,14 @@ escape characters:
 It is possible to have
 multiple identity files specified in configuration files; all these
 identities will be tried in sequence.
 It is possible to have
 multiple identity files specified in configuration files; all these
 identities will be tried in sequence.

+.It Cm KbdInteractiveAuthentication
+Specifies whether to use keyboard-interactive authentication.
+The argument to this keyword must be
+.Dq yes
+or
+.Dq no .
+The default is
+.Dq yes .

 .It Cm KbdInteractiveDevices
 Specifies the list of methods to use in keyboard-interactive authentication.
 Multiple method names must be comma-separated.
 .It Cm KbdInteractiveDevices
 Specifies the list of methods to use in keyboard-interactive authentication.
 Multiple method names must be comma-separated.


@@ -591,7 +633,22 @@ and
 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
 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 .
+the user's shell.
+The following escape character substitutions will be performed:
+.Ql %d
+(local user's home directory),
+.Ql %h
+(remote host name),
+.Ql %l
+(local host name),
+.Ql %n
+(host name as provided on the command line),
+.Ql %p
+(remote port),
+.Ql %r
+(remote user name) or
+.Ql %u
+(local user name).

 This directive is ignored unless
 .Cm PermitLocalCommand
 has been enabled.
 This directive is ignored unless
 .Cm PermitLocalCommand
 has been enabled.


@@ -691,7 +748,8 @@ This allows a client to prefer one method (e.g.\&
 over another method (e.g.\&
 .Cm password )
 The default for this option is:
 over another method (e.g.\&
 .Cm password )
 The default for this option is:

-.Do gssapi-with-mic ,
+.Do gssapi-keyex ,
+gssapi-with-mic,

 hostbased,
 publickey,
 keyboard-interactive,
 hostbased,
 publickey,
 keyboard-interactive,


@@ -715,7 +773,7 @@ if version 2 is not available.
 Specifies the command to use to connect to the server.
 The command
 string extends to the end of the line, and is executed with
 Specifies the command to use to connect to the server.
 The command
 string extends to the end of the line, and is executed with

-.Pa /bin/sh .
+the user's shell.

 In the command string,
 .Ql %h
 will be substituted by the host name to
 In the command string,
 .Ql %h
 will be substituted by the host name to


@@ -787,7 +845,15 @@ and
 .Ar host Ns / Ns Ar hostport .
 Multiple forwardings may be specified, and additional
 forwardings can be given on the command line.
 .Ar host Ns / Ns Ar hostport .
 Multiple forwardings may be specified, and additional
 forwardings can be given on the command line.

-Only the superuser can forward privileged ports.
+Privileged ports can be forwarded only when
+logging in as root on the remote machine.
+.Pp
+If the
+.Ar port
+argument is
+.Ql 0 ,
+the listen port will be dynamically allocated on the server and reported
+to the client at run time.

 .Pp
 If the
 .Ar bind_address
 .Pp
 If the
 .Ar bind_address


@@ -1036,6 +1102,18 @@ See also
 .Sx VERIFYING HOST KEYS
 in
 .Xr ssh 1 .
 .Sx VERIFYING HOST KEYS
 in
 .Xr ssh 1 .

+.It Cm VisualHostKey
+If this flag is set to
+.Dq yes ,
+an ASCII art representation of the remote host key fingerprint is
+printed in addition to the hex fingerprint string at login and
+for unknown host keys.
+If this flag is set to
+.Dq no ,
+no fingerprint strings are printed at login and
+only the hex fingerprint string will be printed for unknown host keys.
+The default is
+.Dq no .

 .It Cm XAuthLocation
 Specifies the full pathname of the
 .Xr xauth 1
 .It Cm XAuthLocation
 Specifies the full pathname of the
 .Xr xauth 1