在RHEL 6下,以下文件适用于sshd：

上将/etc/pam.d/sshd：

#%PAM-1.0
auth       required     pam_sepermit.so
auth       optional     pam_faildelay.so delay=[N time in microseconds]
auth       include      password-auth
 
 
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    optional     pam_keyinit.so force revoke
session    include      password-auth

如果您不想在pam模块配置中设置延迟,可以将其设置为：

/etc/login.defs文件：

FAIL_DELAY    [N time in seconds]

请注意,奇怪的是,FAIL_DELAY接受以秒为单位的时间.

要将其应用于控制台登录,请修改/etc/pam.d/password-auth和/或/etc/pam.d/system-auth.另请注意,您必须在任何其他auth行之前包含pam_faildelay.so行(特别是pam_unix.so).