Remote test MySQL database 3306 port error

Error phenomena:
[[Email protected] ~]# telnet 192.168.10.130 3306
Trying 192.168.10.130 ...
Connected to 192.168.10.130.
Escape character is ' ^] '.
GHost ' 192.168.10.120 ' isn't allowed to connect to this MySQL serverconnection closed by foreign host
Workaround:
The specific reason is the permissions issue, need to reset the external login user rights
Mysql> Grant all privileges on * * to ' root ' @ '% ' identified by ' 123456 ' with GRANT option;
Query OK, 0 rows affected (0.01 sec)

mysql> flush Privileges;
Query OK, 0 rows Affected (0.00 sec)

Mysql> exit

Remote test MySQL database 3306 port error