--- sshd_config.5.orig 2022-02-11 18:50:00.822679000 +0000 +++ sshd_config.5 2022-02-11 19:09:05.162504000 +0000 @@ -701,7 +701,9 @@ .Qq ssh -Q HostbasedAcceptedAlgorithms . This was formerly named HostbasedAcceptedKeyTypes. .It Cm HostbasedAuthentication -Specifies whether rhosts or /etc/hosts.equiv authentication together +Specifies whether rhosts or +.Pa /etc/hosts.equiv +authentication together with successful public key client host authentication is allowed (host-based authentication). The default is @@ -1277,7 +1279,23 @@ .It Cm PasswordAuthentication Specifies whether password authentication is allowed. The default is +.Cm no , +unless +.Nm sshd +was built without PAM support, in which case the default is .Cm yes . +.Pp +Note that if +.Cm ChallengeResponseAuthentication +is +.Cm yes , +and the PAM authentication policy for +.Nm sshd +includes +.Xr pam_unix 8 , +password authentication will be allowed through the challenge-response +mechanism regardless of the value of +.Cm PasswordAuthentication . .It Cm PermitEmptyPasswords When password authentication is allowed, it specifies whether the server allows login to accounts with empty password strings. @@ -1416,6 +1434,13 @@ .Cm ethernet . The default is .Cm no . +Note that if +.Cm ChallengeResponseAuthentication +is +.Cm yes , +the root user may be allowed in with its password even if +.Cm PermitRootLogin is set to +.Cm without-password . .Pp Independent of this setting, the permissions of the selected .Xr tun 4 @@ -1774,12 +1799,19 @@ .Xr sshd 8 as a non-root user. The default is +.Cm yes , +unless +.Nm sshd +was built without PAM support, in which case the default is .Cm no . .It Cm VersionAddendum Optionally specifies additional text to append to the SSH protocol banner sent by the server upon connection. The default is -.Cm none . +.Cm %%SSH_VERSION_FREEBSD_PORT%% . +The value +.Cm none +may be used to disable this. .It Cm X11DisplayOffset Specifies the first display number available for .Xr sshd 8 Ns 's @@ -1793,7 +1825,7 @@ or .Cm no . The default is -.Cm no . +.Cm yes . .Pp When X11 forwarding is enabled, there may be additional exposure to the server and to client displays if the