![无需密码即可通过 ssh 登录,首次登录尝试后,authorized_keys 文件将被删除](https://linux22.com/image/53576/%E6%97%A0%E9%9C%80%E5%AF%86%E7%A0%81%E5%8D%B3%E5%8F%AF%E9%80%9A%E8%BF%87%20ssh%20%E7%99%BB%E5%BD%95%EF%BC%8C%E9%A6%96%E6%AC%A1%E7%99%BB%E5%BD%95%E5%B0%9D%E8%AF%95%E5%90%8E%EF%BC%8Cauthorized_keys%20%E6%96%87%E4%BB%B6%E5%B0%86%E8%A2%AB%E5%88%A0%E9%99%A4.png)
我正在尝试通过 ssh 配置无密码登录。我有 Centos 6.5 这就是我所做的:
- 将 id_rsa.pub 的内容从我的客户端计算机复制到
~/.ssh/authorized_keys
- 将权限设置为 700
~/.ssh
和 600~/.ssh/authorized_keys
- 将以下行添加到
/etc/ssh/sshd_config
:
RSAAuthentication yes PubkeyAuthentication yes AuthorizedKeysFile .ssh/authorized_keys
- 重启sshd服务
.ssh/authorized_keys
但它仍然要求输入密码,并在第一次尝试登录后从服务器中删除。
有人可以帮我解决这个问题吗?
sshd_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
AddressFamily inet
#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
#SyslogFacility AUTH
SyslogFacility AUTHPRIV
#LogLevel INFO
# 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, change to no here!
#PasswordAuthentication yes
#PermitEmptyPasswords no
PasswordAuthentication yes
# 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
#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
# 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'.
#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
#GatewayPorts no
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#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
# Example of overriding settings on a per-user basis
#Match User anoncvs
# ForceCommand cvs server
AllowAgentForwarding yes
AllowTcpForwarding yes
X11Forwarding yes
UseDNS no
PrintMotd no
AuthorizedKeysCommand /usr/local/scripts/ssh_ldap_auth.sh
#AuthorizedKeysCommandRunAs nobody
答案1
我建议这条线可能是罪魁祸首,
AuthorizedKeysCommand /usr/local/scripts/ssh_ldap_auth.sh
这是不寻常的(但显然是受支持的)。手册页表明它用于在检查授权密钥文件之前“收集密钥”,并且可能与本地副本交互或强制密码授权。
鉴于您已在该脚本中找到了此内容,
rm -f /home/$SYSUSER/.ssh/authorized_keys
我认为我们可以确信这就是问题的根源。