Linux MySQL5.7等保问题整改：数据库未配置登录失败处理功能，未配置非法登录策略和登录超时自动退出功能。

Linux MySQL5.7等保问题整改

问题：数据库未配置登录失败处理功能，未配置非法登录策略和登录超时自动退出功能

整改建议：建议数据库设置登录失败处理功能参数，至少满足登录失败次数超过5次采取非法登录锁定措施，登录远超时时间不大于10分钟，如安装CONNECTION_CONTROL和CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS插件，可在命令行中输入。

install plugin CONNECTION_CONTROL soname 'connection_control.so'；
INSTALL PLUGIN CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS SONAME 'connection_control.so';

一、Linux登录MySQL数据库并查看是否开启登录失败和超时功能参数

mysql -u root -p

mysql> show variables like '%connection_control%';
Empty set (0.00 sec)

mysql> install plugin CONNECTION_CONTROL soname 'connection_control.so';
Query OK, 0 rows affected (0.16 sec)

mysql> install plugin CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS soname 'connection_control.so';
Query OK, 0 rows affected (0.00 sec)

mysql> exit
Bye
[root@localhost ~]# 

二、修改配置文件my.cnf

vim /etc/my.cnf

#英文状态下输入：i 进入编辑模式

[mysqld]
connection-control-failed-connections-threshold=5 
connection-control-min-connection-delay=300000

# 按ESC键  输入:wq 保存退出

三、重启MySQL服务，查看是否生效

# 重启MySQL服务
systemctl restart mysqld.service

# 登录MySQL
mysql -uroot -p

# 查看
show variables like '%connection_control%';

[root@localhost ~]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.36-log MySQL Community Server (GPL)

Copyright (c) 2000, 2021, Oracle and/or its affiliates.

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>  show variables like '%connection_control%';
+-------------------------------------------------+------------+
| Variable_name                                   | Value      |
+-------------------------------------------------+------------+
| connection_control_failed_connections_threshold | 5          |
| connection_control_max_connection_delay         | 2147483647 |
| connection_control_min_connection_delay         | 300000     |
+-------------------------------------------------+------------+
3 rows in set (0.01 sec)

mysql> 

四、完成