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通过SSH通道来访问MySQL_MySQL

May 27, 2016 pm 02:12 PM
mysql ssh

许多时候当要使用Mysql时,会遇到如下情况:

出于数据库的安全性,数据库管理员在配置数据库时会为数据库增加一层“保护伞”,保护用户在连接数据库时的安全和信息不被泄漏,通常的做法就是配置SSH,也就是为数据库增加一个安全协议,这也导致了用户进行远程连接时的困难。
1. 信息比较重要,希望通信被加密。
2. 一些端口,比如3306端口,被路由器禁用。

相关mysql视频教程推荐:《mysql教程

对第一个问题的一个比较直接的解决办法就是更改mysql的代码,或者是使用一些证书,不过这种办法显然不是很简单。

这里要介绍另外一种方法,就是利用SSH通道来连接远程的Mysql,方法相当简单。

一、建立SSH通道

例如:

远程Mysql服务器ip:172.21.20.203

mysql端口号:3307 用户名:test 密码:123456

SSH通道IP:117.123.52.161 端口:79

用户名:admin

通过navicat for mysql客户端工具,

通常我们普通连接就是如下:

点击连接测试:弹出错误框,由于添加了SSH协议!所以我们要使用SSH通道,如下图:

这时候点击连接测试,可以连接进去,Test Success.

只需要在本地键入如下命令:

ssh -fNg -L 3307:127.0.0.1:3306 myuser@remotehost.com
The command tells ssh to log in to remotehost.com as myuser, go into the background (-f) and not execute any remote command (-N), and set up port-forwarding (-L localport:localhost:remoteport ). In this case, we forward port 3307 on localhost to port 3306 on remotehost.com.
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二 、连接Mysql

例如:我们在终端输入:

ssh -fNg -p 79 -L 8989:172.21.20.203:3307 admin@117.123.52.161
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现在,你就可以通过本地连接远程的数据库了,就像访问本地的数据库一样。

点击连接,Test Success

mysql -h 127.0.0.1 -P 3307 -u dbuser -p db
The command tells the local MySQL client to connect to localhost port 3307 (which is forwarded via ssh to remotehost.com:3306). The exchange of data between client and server is now sent over the encrypted ssh connection.
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或者用Mysql Query Brower来访问Client的3307端口。

类似的,用PHP访问:

<?php
$smysql = mysql_connect( "127.0.0.1:3307", "dbuser", "PASS" );
mysql_select_db( "db", $smysql );
?>
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Making It A Daemon
A quick and dirty way to make sure the connection runs on startup and respawns on failure is to add it to /etc/inittab and have the init process (the, uh, kernel) keep it going.
Add the following to /etc/inittab on each client:
sm:345:respawn:/usr/bin/ssh -Ng -L 3307:127.0.0.1:3306 myuser@remotehost.com
And that should be all you need to do. Send init the HUP signal ( kill -HUP 1 ) to make it reload the configuration. To turn it off, comment out the line and HUP init again.
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