MySQL数据库远程连接配置
使用ifconfig命令查看服务器的IP地址如下：
[root@bogon ~]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.11 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::24de:dca1:a1fb:f609 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:3e:7b:d2 txqueuelen 1000 (Ethernet)
RX packets 28577 bytes 8446017 (8.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4881 bytes 470355 (459.3 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
把MySQL的3306端口加入防火墙（以CentOS7为例），命令如下：
[root@bogon ~]# firewall-cmd --add-port 3306/tcp
success
[root@bogon ~]# firewall-cmd --list-port
3306/tcp
[root@bogon ~]#
step1 使用root账号登录MySQL，创建一个管理员用户admin
mysql> grant all privileges on *.* to admin@localhost
identified by '[email protected]' with grant option;
Query OK, 0 rows affected, 1 warning (0.07 sec)
step2退出MySQL，然后使用admin账号登录MySQL
[root@bogon ~]# mysql -uadmin -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 5.7.27-log MySQL Community Server (GPL)
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
step3根据实际情况，添加远程连接用户并设置权限
--用户wang可以访问所有数据库，并具备所有操作权限，可以在任意主机上登录
grant all on *.* to 'wang'@'%' identified by '[email protected]';
--用户zhang可以访问所有数据库，并具备所有操作权限，但只能在和服务器同一个网络的主机上登录
grant all on *.* to 'zhang'@'192.168.1.%' identified by '[email protected]';
--用户liu可以访问hist数据库，具备访问hist数据库的所有操作权限，只能在和服务器同一个网络的主机上登录
grant all on *.* to 'liu'@'192.168.1.%' identified by '[email protected]';
mysql> flush privileges; --刷新用户权限
step4打开客户机进行测试
测试客户机的IP和服务器在同一个网络，使用ifconfig查看结果如下：
[root@bogon ~]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.12 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::5dc6:11dc:f5:715e prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:0b:c0:71 txqueuelen 1000 (Ethernet)
RX packets 1072 bytes 514197 (502.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 237 bytes 22685 (22.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
使用用户wang登录，其中参数-h指定登录的服务器地址，-p指定登录密码，-P指定登录的端口号。
登录命令如下：
[root@bogon ~]# mysql -uwang -h192.168.1.11 -p -P3306;
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 5.7.27-log MySQL Community Server (GPL)
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
OK！登录成功！
更换一台安装windows系统客户机，客户机的IP地址如下：
经过测试，使用Windows客户端也可以正常登陆！
