1 files changed, 51 insertions, 3 deletions

diff --git a/sshd_config.5 b/sshd_config.5
index 6e3c69d05..39ef781ff 100644
--- a/sshd_config.5
+++ b/sshd_config.5
@@ -58,6 +58,33 @@ Arguments may optionally be enclosed in double quotes
 .Pq \&"
 in order to represent arguments containing spaces.
 .Pp
+Note that the Debian
+.Ic openssh-server
+package sets several options as standard in
+.Pa /etc/ssh/sshd_config
+which are not the default in
+.Xr sshd 8 .
+The exact list depends on whether the package was installed fresh or
+upgraded from various possible previous versions, but includes at least the
+following:
+.Pp
+.Bl -bullet -offset indent -compact
+.It
+.Cm Protocol No 2
+.It
+.Cm ChallengeResponseAuthentication No no
+.It
+.Cm X11Forwarding No yes
+.It
+.Cm PrintMotd No no
+.It
+.Cm AcceptEnv No LANG LC_*
+.It
+.Cm Subsystem No sftp /usr/lib/openssh/sftp-server
+.It
+.Cm UsePAM No yes
+.El
+.Pp
 The possible
 keywords and their meanings are as follows (note that
 keywords are case-insensitive and arguments are case-sensitive):
@@ -177,8 +204,7 @@ This option is only available for protocol version 2.
 By default, no banner is displayed.
 .It Cm ChallengeResponseAuthentication
 Specifies whether challenge-response authentication is allowed (e.g. via
-PAM or though authentication styles supported in
-.Xr login.conf 5 )
+PAM).
 The default is
 .Dq yes .
 .It Cm ChrootDirectory
@@ -295,6 +321,11 @@ or
 .Dq no .
 The default is
 .Dq delayed .
+.It Cm DebianBanner
+Specifies whether the distribution-specified extra version suffix is
+included during initial protocol handshake.
+The default is
+.Dq yes .
 .It Cm DenyGroups
 This keyword can be followed by a list of group name patterns, separated
 by spaces.
@@ -575,7 +606,7 @@ The default is 120 seconds.
 Gives the verbosity level that is used when logging messages from
 .Xr sshd 8 .
 The possible values are:
-QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG, DEBUG1, DEBUG2, and DEBUG3.
+SILENT, QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG, DEBUG1, DEBUG2, and DEBUG3.
 The default is INFO.
 DEBUG and DEBUG1 are equivalent.
 DEBUG2 and DEBUG3 each specify higher levels of debugging output.
@@ -694,6 +725,20 @@ are refused if the number of unauthenticated connections reaches
 Specifies whether password authentication is allowed.
 The default is
 .Dq yes .
+.It Cm PermitBlacklistedKeys
+Specifies whether
+.Xr sshd 8
+should allow keys recorded in its blacklist of known-compromised keys (see
+.Xr ssh-vulnkey 1 ) .
+If
+.Dq yes ,
+then attempts to authenticate with compromised keys will be logged but
+accepted.
+If
+.Dq no ,
+then attempts to authenticate with compromised keys will be rejected.
+The default is
+.Dq no .
 .It Cm PermitEmptyPasswords
 When password authentication is allowed, it specifies whether the
 server allows login to accounts with empty password strings.
@@ -922,6 +967,9 @@ This avoids infinitely hanging sessions.
 .Pp
 To disable TCP keepalive messages, the value should be set to
 .Dq no .
+.Pp
+This option was formerly called
+.Cm KeepAlive .
 .It Cm TrustedUserCAKeys
 Specifies a file containing public keys of certificate authorities that are
 trusted to sign user certificates for authentication.