Mysql database remote access permission settings

MySQL Database remote access permission settings

For beginners , We installed mysql Local service , Then use some graphical tools to link . Generally, we can link successfully ; however 、 In a simulated real environment, our database cannot be directly installed on the local machine , Most of them are on cloud servers , In this case, our mysql Nor is it a roadside bus that waves and stops , You still offered （ Buy tickets first ！）; That is, your account is not allowed to log in remotely , Only in localhost Sign in , What do I do ？

Next, I will explain two simple methods 、 The simplest method is to log in with an administrator account , In this way, you can modify

Let's login first mysql

One 、 Change table （ Of course, we need to know where the watch is first , Applicable to the entire database ）

• show databases;# Display all databases

• use mysql;# Use mysql database

• show tables;# To find the user surface

• select * from user;# View all the information in this table

We can clearly identify the corresponding host ; Users and user permissions

1、 Directly modifying

update user set host = '%' where user = 'root';# to update root The user's host access is any value

2、 Add specified users and specified permissions

insert into user(host,user) values('ip','user');# Add a user user Address ip Unauthorized user of （ When you can insert new user information , Incidentally, check the authority , There will be an alarm during execution , Because there are constraints in the table , Don't go into it ）

Added successfully , But I don't have permission .

Two 、 to grant authorization

•  Direct authorization （mysql8.0 The version will report an error , Grammatical segmentation ）

grant all privileges on *.* to 'user'@'ip' identified by '123456';# The authorization to the host is ip Of user Open to users , All permissions of all databases and corresponding tables , And the password is set to 123456（ Fast and simple ）

•  Direct authorization （ Change - For the new version ）

create user ‘user’@‘ip’ identified by ‘123456’;# Create a host address that is ip Login password is 123456 Of user user

grant all privileges on *.* to 'user'@'ip';# Link to the previous step , Give him all authority

•  Specify authorization

create user ‘mysql’@‘%’ identified by ‘123456’;# When creating a host address, the login password of any address is 123456 Of mysql user （ Whenever and wherever possible , Login anywhere ）

grant select,create on myemployees.* to 'mysql'@'%';# Set up mysql Users only use myemployees Check of Library , Create permissions

flush privilege;# Refresh the data permission

in the light of mysql8.0 An error will be reported when operating above version and cannot be linked ;

8.0 Because of the change of password rules and syntax rules , So set it again

In the same case, execute the following statements in sequence

alter user ‘mysql’@‘%’ identified by ‘123456’ passwore expire never;# Modify encryption rules

alter user ‘mysql’@‘%’ identified by ‘123456’ mysql_native_password by '123456';# Reset the password again

flush privilege;# Refresh the data permission

Try to link it with tools ！

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