- markus@cvs.openbsd.org 2001/04/11 10:59:01

[openssh.git] / ssh.1

diff --git a/ssh.1 b/ssh.1
index b4fc1a462f51e5579e1e5f99fd132d55a178d570..e775d0dcbbaa7a75d9d14d032050d4cccbb6b308 100644 (file)
--- a/ssh.1
+++ b/ssh.1
@@ -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.1,v 1.98 2001/03/08 00:15:48 markus Exp $
+.\" $OpenBSD: ssh.1,v 1.102 2001/04/10 09:13:22 itojun Exp $
 .Dd September 25, 1999
 .Dt SSH 1
 .Os
@@ -212,8 +212,10 @@ If this method fails password authentication is tried.
 The public key method is similar to RSA authentication described
 in the previous section except that the DSA or RSA algorithm is used
 instead.
-The client uses his private key
+The client uses his private key,
 .Pa $HOME/.ssh/id_dsa
+or
+.Pa $HOME/.ssh/id_rsa ,
 to sign the session identifier and sends the result to the server.
 The server checks whether the matching public key is listed in
 .Pa $HOME/.ssh/authorized_keys2
@@ -640,16 +642,20 @@ The argument must be
 .Dq yes
 or
 .Dq no .
+The default is
+.Dq no .
 .It Cm CheckHostIP
 If this flag is set to
 .Dq yes ,
-ssh will additionally check the host ip address in the
+ssh will additionally check the host IP address in the
 .Pa known_hosts
 file.
 This allows ssh to detect if a host key changed due to DNS spoofing.
 If the option is set to
 .Dq no ,
 the check will not be executed.
+The default is
+.Dq yes .
 .It Cm Cipher
 Specifies the cipher to use for encrypting the session
 in protocol version 1.
@@ -677,8 +683,10 @@ The argument must be
 .Dq yes
 or
 .Dq no .
+The default is
+.Dq no .
 .It Cm CompressionLevel
-Specifies the compression level to use if compression is enable.
+Specifies the compression level to use if compression is enabled.
 The argument must be an integer from 1 (fast) to 9 (slow, best).
 The default level is 6, which is good for most applications.
 The meaning of the values is the same as in
@@ -688,12 +696,15 @@ Specifies the number of tries (one per second) to make before falling
 back to rsh or exiting.
 The argument must be an integer.
 This may be useful in scripts if the connection sometimes fails.
+The default is 4.
 .It Cm PubkeyAuthentication
 Specifies whether to try public key authentication.
 The argument to this keyword must be
 .Dq yes
 or
 .Dq no .
+The default is
+.Dq yes .
 Note that this option applies to protocol version 2 only.
 .It Cm EscapeChar
 Sets the escape character (default:
@@ -720,6 +731,8 @@ The argument must be
 .Dq yes
 or
 .Dq no .
+The default is
+.Dq no .
 .It Cm ForwardAgent
 Specifies whether the connection to the authentication agent (if any)
 will be forwarded to the remote machine.
@@ -849,10 +862,20 @@ The argument to this keyword must be
 .Dq yes
 or
 .Dq no .
+The default is
+.Dq yes .
 Note that this option applies to both protocol version 1 and 2.
 .It Cm Port
 Specifies the port number to connect on the remote host.
 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. 
+.Cm keyboard-interactive )
+over another method (e.g.
+.Cm password )
+The default for this option is:
+.Dq publickey, password, keyboard-interactive
 .It Cm Protocol
 Specifies the protocol versions
 .Nm
@@ -863,11 +886,11 @@ and
 .Dq 2 .
 Multiple versions must be comma-separated.
 The default is
-.Dq 1,2 .
+.Dq 2,1 .
 This means that
 .Nm
-tries version 1 and falls back to version 2
-if version 1 is not available.
+tries version 2 and falls back to version 1
+if version 2 is not available.
 .It Cm ProxyCommand
 Specifies the command to use to connect to the server.
 The command
@@ -915,14 +938,17 @@ The argument to this keyword must be
 .Dq yes
 or
 .Dq no .
+The default is
+.Dq yes .
 .It Cm RhostsRSAAuthentication
 Specifies whether to try rhosts based authentication with RSA host
 authentication.
-This is the primary authentication method for most sites.
 The argument must be
 .Dq yes
 or
 .Dq no .
+The default is
+.Dq yes .
 .It Cm RSAAuthentication
 Specifies whether to try RSA authentication.
 The argument to this keyword must be
@@ -932,6 +958,8 @@ or
 RSA authentication will only be
 attempted if the identity file exists, or an authentication agent is
 running.
+The default is
+.Dq yes .
 Note that this option applies to protocol version 1 only.
 .It Cm ChallengeResponseAuthentication
 Specifies whether to use challenge response authentication.
@@ -1110,8 +1138,9 @@ for protocol version 1 or
 for protocol version 2).
 See
 .Xr sshd 8 .
-.It Pa $HOME/.ssh/identity, $HOME/.ssh/id_dsa
-Contains the RSA and the DSA authentication identity of the user.
+.It Pa $HOME/.ssh/identity, $HOME/.ssh/id_dsa, $HOME/.ssh/id_rsa
+Contains the authentication identity of the user.
+They are for protocol 1 RSA, protocol 2 DSA, and protocol 2 RSA, respectively.
 These files
 contain sensitive data and should be readable by the user but not
 accessible by others (read/write/execute).
@@ -1121,7 +1150,7 @@ ignores a private key file if it is accessible by others.
 It is possible to specify a passphrase when
 generating the key; the passphrase will be used to encrypt the
 sensitive part of this file using 3DES.
-.It Pa $HOME/.ssh/identity.pub, $HOME/.ssh/id_dsa.pub
+.It Pa $HOME/.ssh/identity.pub, $HOME/.ssh/id_dsa.pub, $HOME/.ssh/id_rsa.pub
 Contains the public key for authentication (public part of the
 identity file in human-readable form).
 The contents of the
@@ -1129,13 +1158,15 @@ The contents of the
 file should be added to
 .Pa $HOME/.ssh/authorized_keys
 on all machines
-where you wish to log in using RSA authentication.
+where you wish to log in using protocol version 1 RSA authentication.
 The contents of the
 .Pa $HOME/.ssh/id_dsa.pub
+and
+.Pa $HOME/.ssh/id_rsa.pub
 file should be added to
 .Pa $HOME/.ssh/authorized_keys2
 on all machines
-where you wish to log in using DSA authentication.
+where you wish to log in using protocol version 2 DSA/RSA authentication.
 These files are not
 sensitive and can (but need not) be readable by anyone.
 These files are