关于linux上面ssh和sftp到某台服务器出现Permission denied, please try again.

最近在阿里云上面部署了两台服务器。服务器a（图片服务器）和服务器b（主程序），b是通过java的jsch这个框架来往a传送图片的，但是最近发送在b上面操作sftp的时候一直在报

[root@iZ23h0vz72uZ ~]# sftp [email protected]
Connecting to 192.168.1.11...
[email protected]'s password: 
Permission denied, please try again.

一直报以上的错误，通过各种配置都不行，最后调通了b到a无密码登录的，但是通过程序java的jsch去连的时候会报

Apr 20 10:55:35 iZ2380a1u1tZ sshd[27326]: Failed password for ftp_1 from *.*.*.* port 33118 ssh2
Apr 20 10:55:35 iZ2380a1u1tZ sshd[27327]: Received disconnect from *.*.*.*: 3: com.jcraft.jsch.JSchException: Auth fail

以下是sshd的debug日志

 ： Apr 20 10:55:33 iZ2380a1u1tZ sshd[25188]: debug1: Forked child 27326.
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27326]: Set /proc/self/oom_score_adj to 0
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27326]: debug1: rexec start in 4 out 4 newsock 4 pipe 6 sock 7
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27326]: debug1: inetd sockets after dupping: 3, 3
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27326]: Connection from 192.168.1.11 port 33118
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27326]: debug1: Client protocol version 2.0; client software version JSCH-0.1.51
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27326]: debug1: no match: JSCH-0.1.51
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27326]: debug1: Enabling compatibility mode for protocol 2.0
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27326]: debug1: Local version string SSH-2.0-OpenSSH_5.3
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: permanently_set_uid: 74/74
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: list_hostkey_types: ssh-rsa,ssh-dss
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: SSH2_MSG_KEXINIT sent
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: SSH2_MSG_KEXINIT received
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: kex: client->server aes128-ctr hmac-md5 none
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: kex: server->client aes128-ctr hmac-md5 none
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: expecting SSH2_MSG_KEXDH_INIT
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: SSH2_MSG_NEWKEYS sent
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: expecting SSH2_MSG_NEWKEYS
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: SSH2_MSG_NEWKEYS received
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: KEX done
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: userauth-request for user test_1 service ssh-connection method none
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: attempt 0 failures 0
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27326]: debug1: PAM: initializing for "test_1"
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: userauth-request for user test_1 service ssh-connection method gssapi-with-mic
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: attempt 1 failures 0
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27326]: debug1: PAM: setting PAM_RHOST to "192.168.1.11"
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27326]: debug1: PAM: setting PAM_TTY to "ssh"
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27326]: debug1: Unspecified GSS failure.  Minor code may provide more information\nKey table file '/etc/krb5.keytab' not found\n
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: userauth-request for user test_1 service ssh-connection method password
Apr 20 10:55:33 iZ2380a1u1tZ sshd[27327]: debug1: attempt 2 failures 0
Apr 20 10:55:35 iZ2380a1u1tZ sshd[27326]: debug1: PAM: password authentication failed for test_1: Authentication failure
Apr 20 10:55:35 iZ2380a1u1tZ sshd[27326]: Failed password for test_1 from 192.168.1.11 port 33118 ssh2
Apr 20 10:55:35 iZ2380a1u1tZ sshd[27327]: Received disconnect from 192.168.1.11: 3: com.jcraft.jsch.JSchException: Auth fail
Apr 20 10:55:35 iZ2380a1u1tZ sshd[27327]: debug1: do_cleanup
Apr 20 10:55:35 iZ2380a1u1tZ sshd[27326]: debug1: do_cleanup
Apr 20 10:55:35 iZ2380a1u1tZ sshd[27326]: debug1: PAM: cleanup

以下是/etc/sshd/sshd_config的配置

#       $OpenBSD: sshd_config,v 1.80 2008/07/02 02:24:18 djm Exp $

# This is the sshd server system-wide configuration file.  See
# sshd_config(5) for more information.

# This sshd was compiled with PATH=/usr/local/bin:/bin:/usr/bin

# 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
#ListenAddress 0.0.0.0
#ListenAddress ::

# Disable legacy (protocol version 1) support in the server for new
# installations. In future the default will change to require 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
LogLevel debug

# Authentication:

#LoginGraceTime 2m
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10

#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile     .ssh/authorized_keys
#AuthorizedKeysCommand none
#AuthorizedKeysCommandRunAs nobody

# 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, change to no here!
#PermitEmptyPasswords no

# Change to no to disable s/key passwords
#ChallengeResponseAuthentication yes
ChallengeResponseAuthentication no

# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no
#KerberosUseKuserok yes

# GSSAPI options
GSSAPIAuthentication no
#GSSAPIAuthentication yes
#GSSAPICleanupCredentials yes
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
# PAM authentication via ChallengeResponseAuthentication may bypass
# If you just want the PAM account and session checks to run without
# and ChallengeResponseAuthentication to 'no'.
#UsePAM no
UsePAM yes

# Accept locale-related environment variables
AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
AcceptEnv XMODIFIERS

#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
UseLogin yes
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#ShowPatchLevel no
#PidFile /var/run/sshd.pid
#MaxStartups 10:30:100
#PermitTunnel no
#ChrootDirectory none

# no default banner path
#Banner none

# override default of no subsystems
Subsystem       sftp    /usr/libexec/openssh/sftp-server
#Subsystem sftp internal-sftp

# Example of overriding settings on a per-user basis
#Match User anoncvs
#       X11Forwarding no
#       AllowTcpForwarding no
#       ForceCommand cvs server
#UseDNS yes
UseDns no
AddressFamily inet
PermitRootLogin yes
SyslogFacility AUTHPRIV
PasswordAuthentication yes

最后是把use PAM设置成为no才能正常的sftp和ssh到a服务器，真是太辛苦了，整整搞了一天