navicat 连接不上数据库解决方法

一.can‘t connect to MySql server on ‘192.168.X.X’
这是因为mysql端口被防火墙拦截，需用linux执行如下指令：
1.#/sbin/iptables -I INPUT -p tcp --dport 3306 -j ACCEPT
2.#/etc/rc.d/init.d/iptables save
3.#/etc/init.d/iptables restart
4.查看端口是否开启#/etc/init.d/iptables status
二.1130-host ... is not allowed to connect to this MySql server
方法一：把mysql的user表host等于localhost那条数据host=%
mysql -u root -p password>use mysql;
mysql>update user set host = '%' where user = 'root';
mysql>FLUSH PRIVILEGES;
mysql>select host, user from user;
方法二：

1. 从任何主机连接到mysql服务器
   GRANT ALL PRIVILEGES ON . TO 'root'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;
   FLUSH PRIVILEGES;
   2)只允许用户root从ip为192.168.x.x的主机连接到mysql服务器，并使用password作为密码
   GRANT ALL PRIVILEGES ON . TO 'root'@'192.168.x.x' IDENTIFIED BY 'password' WITH GRANT OPTION;
   FLUSH PRIVILEGES;
   如果你想允许用户root从ip为192.168.x.x'的主机连接到mysql服务器的某个数据库，并使用password作为密码
   GRANT ALL PRIVILEGES ON 数据库名.* TO 'root'@'192.168.x.x' IDENTIFIED BY 'password' WITH GRANT OPTION;
   FLUSH PRIVILEGES;

 

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作者：我的楼兰0909
链接：https://www.jianshu.com/p/643ec8af23b0
来源：简书
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