sshd: cannot disable password authentication, users can alwayslogin with password.

[Zhang Weiwu]

Hello. I'm today following the FreeBSD security how to 
<http://www.it.daemonnews.org/200108/security-howto.html> to secury my 
FreeBSD server. I configured dsa ssh access, now I can use my own 
computer to login to the server with ssh with dsa no problem, no 
password authentication is necessary. Following the guide I edit 
/etc/ssh/sshd_config and made sure

PasswordAuthentication no

But I tried restart sshd and even reboot the server, I can always login 
with password on any other computer.

Please drop me a hint.

Here is my server's configuration:

 > uname -a
FreeBSD dino.realss 5.2-RELEASE FreeBSD 5.2-RELEASE #0: Sun Feb 29 
04:29:22 CST 2004     
zhangweiwu at dino.realss:/usr/src/sys/i386/compile/DINO  i386
 > cat /etc/ssh/sshd_config
#       $OpenBSD: sshd_config,v 1.59 2002/09/25 11:17:16 markus Exp $
#       $FreeBSD: src/crypto/openssh/sshd_config,v 1.33 2003/09/24 
19:20:23 des Exp $
 
# This is the sshd server system-wide configuration file.  See
# sshd_config(5) for more information.
 
# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin
 
# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented.  Uncommented options change a
# default value.
 
# Note that some of FreeBSD's defaults differ from OpenBSD's, and
# FreeBSD has a few additional options.
 
#VersionAddendum FreeBSD-20030924
 
Port 22
Protocol 2
#ListenAddress 0.0.0.0
#ListenAddress ::
 
# HostKey for protocol version 1
#HostKey /etc/ssh/ssh_host_key
# HostKeys for protocol version 2
#HostKey /etc/ssh/ssh_host_dsa_key
 
# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 3600
#ServerKeyBits 768
 
# Logging
#obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
#LogLevel INFO
 
# Authentication:
 
#LoginGraceTime 120
PermitRootLogin no
StrictModes yes
 
RSAAuthentication no
PubkeyAuthentication yes
#AuthorizedKeysFile     .ssh/authorized_keys
 
# rhosts authentication should not be used
RhostsAuthentication no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes
# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
 
# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication no
PermitEmptyPasswords no
 
# Change to no to disable PAM authentication
#ChallengeResponseAuthentication yes
 
# Kerberos options
KerberosAuthentication no
KerberosOrLocalPasswd no
#KerberosTicketCleanup yes
 
#AFSTokenPassing no
 
# Kerberos TGT Passing only works with the AFS kaserver
#KerberosTgtPassing no
 
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#KeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression yes
 
#MaxStartups 10
# no default banner path
#Banner /some/path
#VerifyReverseMapping no
 
# override default of no subsystems
Subsystem       sftp    /usr/libexec/sftp-server
 >