如何修改linux 的SSH的預設端口号?

在安裝完畢linux，預設的情況下ssh是開放的，容易受到黑客攻擊，簡單，有效的操作之一就是修改預設端口号

如下列，我們把22修改我2501

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

步驟一

[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注釋掉

port 2501            //添加一個新的端口

#Protocol 2,1

步驟二

[root@localhost ~]# service sshd restart

Stopping sshd:[  OK  ]

Starting sshd:[  OK  ]

步驟三

用SecureCRT測試