3.重启ssh
[root@localhost ~]# /etc/rc.d/init.d/sshd restart 停止 sshd： [ 确定 ] 启动 sshd [ 确定 ]
1.在hosts.deny文件尾添加sshd:ALL 意思是拒绝所有访问请求
[root@localhost ~]# vi /etc/hosts.deny
修改后看起来如下：
# # hosts.deny This file describes the names of the hosts which are # *not* allowed to use the local INET services, as decided # by the ‘/usr/sbin/tcpd’ server. # # The portmap line is redundant, but it is left to remind you that # the new secure portmap uses hosts.deny and hosts.allow. In particular # you should know that NFS uses portmap! sshd:ALL
2.在hosts.allow文件尾添加sshd:192.168.0. 意思是允许192.168.0.1 到254的主机，内网。
[root@localhost ~]# vi /etc/hosts.allow # # hosts.allow This file describes the names of the hosts which are # allowed to use the local INET services, as decided # by the ‘/usr/sbin/tcpd’ server. # sshd:192.168.0.