如果不想被黑客拿无限字典工具测出来，最好连ssh端口也给改掉，毕竟不怕贼偷就怕贼惦记。天天扫你一百万遍也很浪费流量的。
修改的是 /etc/ssh/sshd_config 文件
[root@linux ~]# vi /etc/ssh/sshd_config # $OpenBSD: sshd_config,v 1.69 2004/05/23 23:59:53 dtucker Exp $ # This is the sshd server system-wide configuration file. See # sshd_config(5) for more information. # This sshd was compiled with PATH=/usr/local/bin:/bin:/usr/bin # The strategy used for options in the default sshd_config shipped with # OpenSSH is to specify options with their default value where # possible, but leave them commented. Uncommented options change a # default value. Port 22 //以前这个前面是有 # 号的，而且默认是 22 ，修改一下就ok了 #Protocol 2,1 #ListenAddress 0.0.0.0 #ListenAddress :: # HostKey for protocol version 1 #HostKey /etc/ssh/ssh_host_key # HostKeys for protocol version 2 #HostKey /etc/ssh/ssh_host_rsa_key #HostKey /etc/ssh/ssh_host_dsa_key
重起ssh服务，修改端口才生效
[root@linux ~]# service sshd restart Stopping sshd: [ OK ] Starting sshd: [ OK ] [root@linux ~]#
为了检验是否正确，可以使用 netstat -an 命令查看一下。
