如何修改linux 的SSH的默认端口号?

在安装完毕linux，默认的情况下ssh是开放的，容易受到黑客攻击，简单，有效的操作之一就是修改默认端口号

如下列，我们把22修改我2501

就是修改/etc/ssh/sshd_config   //注意，容易和ssh_config相混合

步骤一

[root@localhost ssh]# more 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             //先把22注释掉
port 2501            //添加一个新的端口
#Protocol 2,1

步骤二

[root@localhost ~]# service sshd restart
Stopping sshd:[  OK  ]
Starting sshd:[  OK  ]

步骤三

用SecureCRT测试