Linux限制远程登录尝试密码次数及锁定时间

[root@XK-V-HOME-24 ~]# vim /etc/pam.d/login 
#%PAM-1.0
auth    required    pam_tally2.so    deny=3    unlock_time=100 even_deny_root root_unlock_time=200
auth [user_unknown=ignore success=ok ignore=ignore default=bad] pam_securetty.so
auth       substack     system-auth
auth       include      postlogin
account    required     pam_nologin.so
account    include      system-auth
password   include      system-auth
# pam_selinux.so close should be the first session rule
session    required     pam_selinux.so close
  ssion    required     pam_loginuid.so
session    optional     pam_console.so
# pam_selinux.so open should only be followed by sessions to be executed in the user context
session    required     pam_selinux.so open
session    required     pam_namespace.so
session    optional     pam_keyinit.so force revoke
session    include      system-auth
session    include      postlogin
-session   optional     pam_ck_connector.so复制

auth    required    pam_tally2.so    deny=3    unlock_time=100 even_deny_root root_unlock_time=200复制

even_deny_root    也限制root用户； 
deny           设置普通用户和root用户连续错误登陆的最大次数，超过最大次数，则锁定该用户 
unlock_time        设定普通用户锁定后，多少时间后解锁，单位是秒； 
root_unlock_time      设定root用户锁定后，多少时间后解锁，单位是秒； 
此处使用的是 pam_tally2 模块，如果不支持 pam_tally2 可以使用 pam_tally 模块。另外，不同的pam版本，设置可能有所不同，具体使用方法，可以参照相关模块的使用规则。复制

添加参数介绍：设置密码尝试错误三次，普通用户和root用户都进行锁定，普通用户锁定100秒，root用户锁定200秒复制

[root@XK-V-HOME-24 ~]# vim /etc/pam.d/sshd 
#%PAM-1.0
auth    required    pam_tally2.so    deny=3    unlock_time=100 even_deny_root root_unlock_time=200
auth       required     pam_sepermit.so
auth       substack     password-auth
auth       include      postlogin
# Used with polkit to reauthorize users in remote sessions
-auth      optional     pam_reauthorize.so prepare
account    required     pam_nologin.so
account    include      password-auth
password   include      password-auth
# pam_selinux.so close should be the first session rule
session    required     pam_selinux.so close
session    required     pam_loginuid.so
# pam_selinux.so open should only be followed by sessions to be executed in the user context
session    required     pam_selinux.so open env_params
session    required     pam_namespace.so
session    optional     pam_keyinit.so force revoke
session    include      password-auth
session    include      postlogin
# Used with polkit to reauthorize users in remote sessions
-session   optional     pam_reauthorize.so prepare复制

[root@XK-V-HOME-24 ~]# pam_tally2 --user
[root@XK-V-HOME-24 ~]# 复制

pam_tally2: [-f rooted-filename] [--file rooted-filename]
   [-u username] [--user username]
   [-r] [--reset[=n]] [--quiet]复制