OS X系统10.8如果有关系。
我启用了内置sshd密码validation，因此更改了PasswordAuthentication的设置：
# To disable tunneled clear text passwords both PasswordAuthentication and # ChallengeResponseAuthentication must be set to "no" PasswordAuthentication yes PermitEmptyPasswords yes # Change to no to disable s/key passwords ChallengeResponseAuthentication yes
这确实启用了密码validation，但是由于某种原因，它似乎也影响了键盘validation。
如果我尝试进入机器（没有select），它永远挂起。 如果我使用ssh -vvv ，发送键盘交互数据包后，可以看到它挂起：
debug1: Authentications that can continue: publickey,password,keyboard-interactive debug3: start over, passed a different list publickey,password,keyboard-interactive debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Trying private key: /home/ucc/coxy/.ssh/id_rsa debug3: no such identity: /home/ucc/coxy/.ssh/id_rsa debug1: Trying private key: /home/ucc/coxy/.ssh/id_dsa debug3: no such identity: /home/ucc/coxy/.ssh/id_dsa debug2: we did not send a packet, disable method debug3: authmethod_lookup keyboard-interactive debug3: remaining preferred: password debug3: authmethod_is_enabled keyboard-interactive debug1: Next authentication method: keyboard-interactive debug2: userauth_kbdint debug2: we sent a keyboard-interactive packet, wait for reply
当然，如果我使用ssh -o 'KbdInteractiveDevices no'那么我可以很好地进入。 但是我更喜欢在可能的情况下使用键盘交互式身份validation，或者至less使其更优雅地回退。 我能做什么？ 有没有办法改变我的sshd首选身份validationtypes的顺序？
编辑：完整的sshd_config，很标准。
# $OpenBSD: sshd_config,v 1.81 2009/10/08 14:03:41 markus 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. #Port 22 #AddressFamily any #ListenAddress 0.0.0.0 #ListenAddress :: # The default requires explicit activation of protocol 1 #Protocol 2 # HostKey for protocol version 1 #HostKey /etc/ssh/ssh_host_key # HostKeys for protocol version 2 #HostKey /etc/ssh/ssh_host_rsa_key #HostKey /etc/ssh/ssh_host_dsa_key # Lifetime and size of ephemeral version 1 server key #KeyRegenerationInterval 1h #ServerKeyBits 1024 # Logging # obsoletes QuietMode and FascistLogging SyslogFacility AUTHPRIV LogLevel DEBUG2 # Authentication: #LoginGraceTime 2m #PermitRootLogin yes #StrictModes yes #MaxAuthTries 6 #MaxSessions 10 #RSAAuthentication yes #PubkeyAuthentication yes #AuthorizedKeysFile .ssh/authorized_keys # 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 # Don't read the user's ~/.rhosts and ~/.shosts files #IgnoreRhosts yes # To disable tunneled clear text passwords both PasswordAuthentication and # ChallengeResponseAuthentication must be set to "no" PasswordAuthentication yes PermitEmptyPasswords yes # Change to no to disable s/key passwords ChallengeResponseAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes #GSSAPIStrictAcceptorCheck yes #GSSAPIKeyExchange no # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. # Also, PAM will deny null passwords by default. If you need to allow # null passwords, add the " nullok" option to the end of the # securityserver.so line in /etc/pam.d/sshd. #UsePAM yes #AllowAgentForwarding yes #AllowTcpForwarding yes #GatewayPorts no #X11Forwarding no #X11DisplayOffset 10 #X11UseLocalhost yes #PrintMotd yes #PrintLastLog yes #TCPKeepAlive yes #UseLogin no #UsePrivilegeSeparation yes #PermitUserEnvironment no #Compression delayed #ClientAliveInterval 0 #ClientAliveCountMax 3 #UseDNS yes #PidFile /var/run/sshd.pid #MaxStartups 10 #PermitTunnel no #ChrootDirectory none # pass locale information AcceptEnv LANG LC_* # no default banner path #Banner none # override default of no subsystems Subsystem sftp /usr/libexec/sftp-server # Example of overriding settings on a per-user basis #Match User anoncvs # X11Forwarding no # AllowTcpForwarding no # ForceCommand cvs server
这似乎是在系统10.9小牛修复的sshd中的一个错误。
从详细的日志logging中可以看出，它仍然不完美。 无论出于何种原因，都不会使用键盘交互式身份validation。 但至less现在它没有被告知密码authentication。
debug1: Authentications that can continue: publickey,password,keyboard-interactive debug3: start over, passed a different list publickey,password,keyboard-interactive debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /home/ucc/coxy/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Trying private key: /home/ucc/coxy/.ssh/id_dsa debug3: no such identity: /home/ucc/coxy/.ssh/id_dsa debug1: Trying private key: /home/ucc/coxy/.ssh/id_ecdsa debug3: no such identity: /home/ucc/coxy/.ssh/id_ecdsa debug2: we did not send a packet, disable method debug3: authmethod_lookup keyboard-interactive debug3: remaining preferred: password debug3: authmethod_is_enabled keyboard-interactive debug1: Next authentication method: keyboard-interactive debug2: userauth_kbdint debug2: we sent a keyboard-interactive packet, wait for reply debug1: Authentications that can continue: publickey,password,keyboard-interactive debug3: userauth_kbdint: disable: no info_req_seen debug2: we did not send a packet, disable method debug3: authmethod_lookup password debug3: remaining preferred: debug3: authmethod_is_enabled password debug1: Next authentication method: password