.\" (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 1.167 2002/09/27 15:46:21 stevesk Exp $
+.\" $OpenBSD: ssh.1,v 1.168 2003/03/28 10:11:43 jmc Exp $
.Dd September 25, 1999
.Dt SSH 1
.Os
.Op Ar command
.Pp
.Nm ssh
+.Bk -words
.Op Fl afgknqstvxACNTX1246
.Op Fl b Ar bind_address
.Op Fl c Ar cipher_spec
.Sm on
.Xc
.Oc
+.Ek
+.Bk -words
.Oo Fl R Xo
.Sm off
.Ar port :
.Op Fl D Ar port
.Ar hostname | user@hostname
.Op Ar command
+.Ek
.Sh DESCRIPTION
.Nm
(SSH client) is a program for logging into a remote machine and for
.Fl A
and
.Fl a
-options described later) and
+options described later) and
the user is using an authentication agent, the connection to the agent
is automatically forwarded to the remote side.
.Pp
Enables forwarding of the authentication agent connection.
This can also be specified on a per-host basis in a configuration file.
.Pp
-Agent forwarding should be enabled with caution. Users with the
-ability to bypass file permissions on the remote host (for the agent's
-Unix-domain socket) can access the local agent through the forwarded
-connection. An attacker cannot obtain key material from the agent,
+Agent forwarding should be enabled with caution.
+Users with the ability to bypass file permissions on the remote host
+(for the agent's Unix-domain socket)
+can access the local agent through the forwarded connection.
+An attacker cannot obtain key material from the agent,
however they can perform operations on the keys that enable them to
authenticate using the identities loaded into the agent.
.It Fl b Ar bind_address
client for interoperability with legacy protocol 1 implementations
that do not support the
.Ar 3des
-cipher. Its use is strongly discouraged due to cryptographic
-weaknesses.
+cipher.
+Its use is strongly discouraged due to cryptographic weaknesses.
.It Fl c Ar cipher_spec
Additionally, for protocol version 2 a comma-separated list of ciphers can
be specified in order of preference.
Enables X11 forwarding.
This can also be specified on a per-host basis in a configuration file.
.Pp
-X11 forwarding should be enabled with caution. Users with the ability
-to bypass file permissions on the remote host (for the user's X
-authorization database) can access the local X11 display through the
-forwarded connection. An attacker may then be able to perform
-activities such as keystroke monitoring.
+X11 forwarding should be enabled with caution.
+Users with the ability to bypass file permissions on the remote host
+(for the user's X authorization database)
+can access the local X11 display through the forwarded connection.
+An attacker may then be able to perform activities such as keystroke monitoring.
.It Fl C
Requests compression of all data (including stdin, stdout, stderr, and
data for forwarded X11 and TCP/IP connections).
on the local side, and whenever a connection is made to this port, the
connection is forwarded over the secure channel, and the application
protocol is then used to determine where to connect to from the
-remote machine. Currently the SOCKS4 protocol is supported, and
+remote machine.
+Currently the SOCKS4 protocol is supported, and
.Nm
will act as a SOCKS4 server.
Only root can forward privileged ports.