SSH是什么？Linux如何修改SSH端口号

SSH是什么？Linux如何修改SSH端口号

ssh 和telnet 差不多, 都是远程登录的客户端, 只不过ssh更安全(加密方式), telnet是明文传输.ssh IP地址ssh 域名具体可以查看man ssh或者ssh --help查看一下
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测试一下

linux下修改端口号只需要更改相应服务的配置文件即可，下面以修改linux 的ssh服务的默认端口号22为例（把22修改我2501）： 1、修改/etc/ssh/sshd_config配置文件 [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 2、重启ssh服务让修改的端口号生效