linux下修改ssh默认端口号

1、简介

     为了系统的安全性，有时需要修改ssh的默认端口。修改方法如下：

     vim  /etc/ssh/sshd_config
     添加两个Port

        # $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
       Port 8284 
       #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

       重启sshd服务

       /etc/init.d/sshd restart

      若防火墙开启，需要修改防火墙设置。