ERROR 2003 (HY000): Can't connect to MySQL server on '192.168.245.11' (113)
报错状态码“113”，表示防火墙拦截导致。
查看宿主的防火墙规则
```
[root@localhost mysql]# firewall-cmd --list-all
public (active)
target: default
icmp-block-inversion: no
interfaces: ens33
sources:
services: dhcpv6-client ssh
ports:
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
```
ports项为空，因此需配置放开3306端口
```
[root@localhost mysql]# firewall-cmd --zone=public --add-port=3306/tcp --permanent #添加开放端口3306
success
[root@localhost mysql]# firewall-cmd --reload #重新加载
success
[root@localhost mysql]# firewall-cmd --list-all #查看防火墙规则
public (active)
target: default
icmp-block-inversion: no
interfaces: ens33
sources:
services: dhcpv6-client ssh
ports: 3306/tcp
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
```
再次访问mysql成功
```
root@a651adcacacf:/# mysql -uroot -h192.168.245.11
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 12
Server version: 8.0.21 MySQL Community Server - GPL
Copyright (c) 2000, 2020, 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>
```
