原文地址： http://blog.csdn.net/jianglei421/article/details/7173198

[root@localhost ~]# vi /etc/pam.d/sshd 
#%PAM-1.0
auth       required     pam_stack.so service=system-auth
auth       required     pam_nologin.so
auth       required     pam_listfile.so item=user sense=allow file=/etc/sshusers onerr=fail
account    required     pam_stack.so service=system-auth
password   required     pam_stack.so service=system-auth
session    required     pam_stack.so service=system-auth

2）建立/etc/sshusers文件
[root@localhost ~]# touch /etc/sshusers

3）把允许登陆的用户加入到 /etc/sshusers

[root@localhost ~]#echo "root" >> /etc/sshusers
[root@localhost ~]#echo "admin" >> /etc/sshusers

...

这样 root 和admin就可以ssh到你的服务器上去了