=================================================================== RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/ssh/sshd_config.5,v retrieving revision 1.180 retrieving revision 1.181 diff -u -r1.180 -r1.181 --- src/usr.bin/ssh/sshd_config.5 2014/11/22 19:21:03 1.180 +++ src/usr.bin/ssh/sshd_config.5 2014/12/11 05:25:06 1.181 @@ -33,8 +33,8 @@ .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" -.\" $OpenBSD: sshd_config.5,v 1.180 2014/11/22 19:21:03 jmc Exp $ -.Dd $Mdocdate: November 22 2014 $ +.\" $OpenBSD: sshd_config.5,v 1.181 2014/12/11 05:25:06 djm Exp $ +.Dd $Mdocdate: December 11 2014 $ .Dt SSHD_CONFIG 5 .Os .Sh NAME @@ -210,6 +210,18 @@ .Dq bsdauth device. .Pp +If the +.Dq publickey +method is listed more than one, +.Xr sshd 8 +verifies that keys that have been successfully are not reused for subsequent +authentications. +For example, an +.Cm AuthenticationMethods +of +.Dq publickey,publickey +will require successful authentication using two different public keys. +.Pp This option is only available for SSH protocol 2 and will yield a fatal error if enabled if protocol 1 is also enabled. Note that each authentication method listed should also be explicitly enabled @@ -232,6 +244,9 @@ Specifies the user under whose account the AuthorizedKeysCommand is run. It is recommended to use a dedicated user that has no other role on the host than running authorized keys commands. +If no user is specified then +.Cm AuthorizedKeysCommand +is ignored. .It Cm AuthorizedKeysFile Specifies the file that contains the public keys that can be used for user authentication.