centos7.4 限制用户登录失败次数并锁定用户

1. /etc/pam.d/login 修改

主要是这段代码， 放在第二行
auth required pam_tally2.so deny=5 lock_time=300 even_deny_root root_unlock_time=300
deny：连续错误次数
lock_time：锁定时间 单位秒
even_deny_root root_unlock_time=300 这2个是root用户的配置

#%PAM-1.0
###
auth      required  pam_tally2.so   deny=5  lock_time=300 even_deny_root root_unlock_time=300
auth [user_unknown=ignore success=ok ignore=ignore default=bad] pam_securetty.so
auth       substack     system-auth
auth       include      postlogin

2 /etc/pam.d/system-auth 最后添加2行

auth required pam_tally.so onerr=fail no_magic_root
account required pam_tally.so deny=5 unlock_time=300 root_unlock_time=300 no_magic_root even_deny_root_account per_user reset

#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
session     required      pam_unix.so 
auth  required  pam_tally.so  onerr=fail  no_magic_root
account  required  pam_tally.so   deny=5 unlock_time=300   root_unlock_time=300  no_magic_root  even_deny_root_account  per_user  reset

以上是控制tty 登录，并没有设置sshd

3 /etc/pam.d/sshd 修改

主要是这一行 auth required pam_tally2.so deny=5 unlock_time=300 even_deny_root root_unlock_time=300

#%PAM-1.0
auth          required        pam_tally2.so        deny=5  unlock_time=300 even_deny_root root_unlock_time=300
auth	   required	pam_sepermit.so
auth       substack     password-auth
 

4 /etc/ssh/sshd_config 修改

##最大连续出错5次
sed -i "s/#MaxAuthTries 6/MaxAuthTries 5/" /etc/ssh/sshd_config
## 空闲客户端保持5分钟
sed -i "s/#ClientAliveInterval 0/ClientAliveInterval 300/" /etc/ssh/sshd_config