mysql connection from VM to host - mysql

Host:
Ubuntu 14.04
192.168.1.4
mysql database with: GRANT ALL PRIVILEGES ON . TO grails#'192.168.122.%' IDENTIFIED BY 'grails';
VM :
Centos 6.6
192.168.122.111
Problem:
Application (grails) can't see mysql database located on host machine.
url = "jdbc:mysql://192.168.122.11/grails?useUnicode=yes&characterEncoding=UTF-8"
I can
ping between 'machines'.
log with ssh from host to vm and vice versa

Try flushing the privileges
login as root and use MySQL; Database, something to do with the grant privilege
FLUSH PRIVILEGES;
remove the old user entry for that user and do a direct INSERT for the user with the domain into user table.
insert into user (....) values (....)

permission should be as per below-
GRANT ALL PRIVILEGES ON *.* TO grails#'192.168.122.%' IDENTIFIED BY 'grails';
or
GRANT ALL PRIVILEGES ON db.* TO grails#'192.168.122.%' IDENTIFIED BY 'grails';
If your permissions are ok, then go to 192.168.122.111 machine and try to connect db server from here by below command-
mysql -h 192.168.1.4 -ugrails -pgrails
If not able from here also then you need to check other things like iptables related firewall setting, port 3306 is open or not etc.

Related

How to enable remote connection in Mysql 8.0 on Debian 10

I'm trying to connect remotely to mysql and this isn't possible, I'm running Debian 10 and mysql server 8.0 in my server, I did try to do the changes in /etc/mysql/my.cnf to change or comment bind-address and skip-networking but It doesn't work for me.
I found the solution, in Mysql 8.0 remote connections It doesn't need enable in remote connection you only need to create a new user and give it grant privileges, the command in sql console that I used :
CREATE USER 'newuser'#'%' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON *.* TO 'newuser'#'%' WITH GRANT OPTION;
FLUSH privileges;
Reference: https://www.youtube.com/watch?v=K_UkiAMyPpk

How to solve "Failed to connect to MySQL Host" Error in CentOS

Failed to connect to MySQL: Host 'IP-Address' is not allowed to
connect to this MySQL server.
CentOS server is our MySql host server and i want to connect that mysql from another client web-host server.
How can I do that?
Add user for the host to your mysql side and write below command.
mysql -p,
GRANT ALL PRIVILEGES ON DB_NAME.* TO USER#HOST_IP IDENTIFIED BY 'PASSWORD';
note: your port must be 3306
Try to see iptables and check that you're allowed to connect to server from your host, allow port 3306
Add user for the host your mysql side:
mysql -p,
GRANT ALL PRIVILEGES ON your_database.* TO your_user#ip_of_your_host IDENTIFIED BY 'your_password';
try this
mysql -p GRANT ALL PRIVILEGES ON DB_NAME.* TO USER#HOST_IP IDENTIFIED BY 'PASSWORD';
I use this twice in last month.

Connection to MySQL Server not working

I want to connect to my SQL Server on my remote server. I have installed MySQL on this server with apt-get and set up all necessary details. On the server everything works fine. When I want to connect with the MySQL Workbench, I cannot connect with any user at all.
I logged into MySQL in Ubuntu and created a new user first:
CREATE USER 'username'#'localhost' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON *.* TO 'username'#'localhost' WITH GRANT OPTION;
CREATE USER 'username'#'%' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON *.* TO 'username'#'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;
I opened the my.cnf file:
port 3306
bind-address 127.0.0.01 (DO I NEED HERE MY REMOTE SERVER IP?)
service mysql restart
My questions would be:
1) why is the host 127.0.0.1 on my remote server?
2) In the workbench connection setup: which hostname is correct? my server IP or 127.0.0.1
3)I get the message: Failed to connect to MySQL. Access denied. So I think the user is the issue?
4) Do I need to change the cnf?
Thank you.
After you create the user and configure the right permission did you
FLUSH PRIVILEGES;
After you change your my.cnf did you restart Mysql?
Stop and Start from XAMPP Panel control
Change
bind address=127.0.0.1
to
bind-address=YOUR-SERVER-IP

Re-Enable localhost privileges on MySQL

I work with XAMPP and by mistake I deleted all privileges for localhost in MySQL so I can't use the localhost to GRANT ALL PRIVILEGES TO *.* root#localhost since I'm doing this in the localhost. I remember a User with full privileges and Its password but I can't do much since the localhost has no privileges at all and if I use the MYSQL Shell it tells me the same thing
I didn't enable remote access when I installed the XAMPP so it could be also a problem (Or maybe not and there is a solution within my machine).
Is there a way to access to mysql.user in some way to enable again the privileges for my localhost, or do it using the MySQL shell?
stop server
start server with –skip-grant-tables key
connect to server as root without password
edit privileges table:
USE mysql;
UPDATE user SET host='localhost' WHERE user=’root’ LIMIT 1;
FLUSH PRIVILEGES;
start server in normal mode
If you can restart MySQL server then follow these steps - How to Reset the Root Password.

grant remote access of MySQL database from any IP address

I am aware of this command:
GRANT ALL PRIVILEGES
ON database.*
TO 'user'#'yourremotehost'
IDENTIFIED BY 'newpassword';
But then it only allows me to grant a particular IP address to access this remote MySQL database. What if I want it so that any remote host can access this MySQL database? How do I do that? Basically I am making this database public so everyone can access it.
TO 'user'#'%'
% is a wildcard - you can also do '%.domain.example' or '%.123.123.123' and things like that if you need.
Enable Remote Access (Grant)
Home / Tutorials / Mysql / Enable Remote Access (Grant)
If you try to connect to your mysql server from remote machine, and run into error like below, this article is for you.
ERROR 1130 (HY000): Host ‘1.2.3.4’ is not allowed to connect to this
MySQL server
Change mysql config
Start with editing mysql config file
vim /etc/mysql/my.cnf
Comment out following lines.
#bind-address = 127.0.0.1
#skip-networking
If you do not find skip-networking line, add it and comment out it.
Restart mysql server.
~ /etc/init.d/mysql restart
Change GRANT privilege
You may be surprised to see even after above change you are not getting remote access or getting access but not able to all databases.
By default, mysql username and password you are using is allowed to access mysql-server locally. So need to update privilege. (if you want to create a separate user for that purpose, you can use CREATE USER 'USERNAME'#'localhost' IDENTIFIED BY 'PASSWORD';)
Run a command like below to access from all machines. (Replace USERNAME and PASSWORD by your credentials.)
mysql> GRANT ALL PRIVILEGES ON *.* TO 'USERNAME'#'%' IDENTIFIED BY 'PASSWORD' WITH GRANT OPTION;
Run a command like below to give access from specific IP. (Replace USERNAME and PASSWORD by your credentials.)
mysql> GRANT ALL PRIVILEGES ON *.* TO 'USERNAME'#'1.2.3.4' IDENTIFIED BY 'PASSWORD' WITH GRANT OPTION;
You can replace 1.2.3.4 with your IP. You can run above command many times to GRANT access from multiple IPs.
You can also specify a separate USERNAME & PASSWORD for remote access.
You can check final outcome by:
SELECT * from information_schema.user_privileges where grantee like "'USERNAME'%";
Finally, you may also need to run:
mysql> FLUSH PRIVILEGES;
Test Connection
From terminal/command-line:
mysql -h HOST -u USERNAME -pPASSWORD
If you get a mysql shell, don’t forget to run show databases; to check if you have right privileges from remote machines.
Bonus-Tip: Revoke Access
If you accidentally grant access to a user, then better have revoking option handy.
Following will revoke all options for USERNAME from all machines:
mysql> REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'USERNAME'#'%';
Following will revoke all options for USERNAME from particular IP:
mysql> REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'USERNAME'#'1.2.3.4';
Its better to check information_schema.user_privileges table after running REVOKE command.
If you see USAGE privilege after running REVOKE command, its fine. It is as good as no privilege at all. I am not sure if it can be revoked.
To be able to connect with your user from any IP address, do the following:
Allow mysql server to accept remote connections. For this open mysqld.conf file:
sudo gedit /etc/mysql/mysql.conf.d/mysqld.cnf
Search for the line starting with "bind-address" and set it's value to 0.0.0.0
bind-address = 0.0.0.0
and finally save the file.
Note: If you’re running MySQL 8+, the bind-address directive will not be in the mysqld.cnf file by default. In this case, add the directive to the bottom of the file /etc/mysql/mysql.conf.d/mysqld.cnf.
Now restart the mysql server, either with systemd or use the older service command. This depends on your operating system:
sudo systemctl restart mysql # for ubuntu
sudo systemctl restart mysqld.service # for debian
Finally, mysql server is now able to accept remote connections.
Now we need to create a user and grant it permission, so we can be able to login with this user remotely.
Connect to MySQL database as root, or any other user with root privilege.
mysql -u root -p
now create desired user in both localhost and '%' wildcard and grant permissions on all DB's as such .
CREATE USER 'myuser'#'localhost' IDENTIFIED BY 'mypass';
CREATE USER 'myuser'#'%' IDENTIFIED BY 'mypass';
Then,
GRANT ALL ON *.* TO 'myuser'#'localhost';
GRANT ALL ON *.* TO 'myuser'#'%';
And finally don't forget to flush privileges
FLUSH PRIVILEGES;
Note: If you’ve configured a firewall on your database server, you will also need to open port 3306 MySQL’s default port to allow traffic to MySQL.
Hope this helps ;)
Assuming that the above step is completed and MySql port 3306 is free to be accessed remotely; Don't forget to bind the public ip address in the mysql config file.
For example on my ubuntu server:
#nano /etc/mysql/my.cnf
In the file, search for the [mysqld] section block and add the new bind address, in this example it is 192.168.0.116. It would look something like this
......
.....
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address = 127.0.0.1
bind-address = 192.168.0.116
.....
......
you can remove th localhost(127.0.0.1) binding if you choose, but then you have to specifically give an IP address to access the server on the local machine.
Then the last step is to restart the MySql server
(on ubuntu)
stop mysql
start mysql
or #/etc/init.d/mysql restart for other systems
Now the MySQL database can be accessed remotely by:
mysql -u username -h 192.168.0.116 -p
Config file changes are required to enable connections via localhost.
To connect through remote IPs, Login as a "root" user and run the below queries in mysql.
CREATE USER 'username'#'localhost' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON *.* TO 'username'#'localhost' WITH GRANT OPTION;
CREATE USER 'username'#'%' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON *.* TO 'username'#'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;
This will create a new user that is accessible on localhost as well as from remote IPs.
Also comment the below line from your my.cnf file located in /etc/mysql/my.cnf
bind-address = 127.0.0.1
Restart your mysql using
sudo service mysql restart
Now you should be able to connect remotely to your mysql.
For anyone who fumbled with this, here is how I got to grant the privileges, hope it helps someone
GRANT ALL ON yourdatabasename.* TO root#'%' IDENTIFIED BY
'yourRootPassword';
As noted % is a wildcard and this will allow any IP address to connect to your database. The assumption I make here is when you connect you'll have a user named root (which is the default though). Feed in the root password and you are good to go. Note that I have no single quotes (') around the user root.
Use this command:
GRANT ALL ON yourdatabasename.* TO root#'%' IDENTIFIED BY 'yourRootPassword';
Then:
FLUSH PRIVILEGES;
Then comment out the below line in file "/etc/mysql/mysql.conf.d/mysqld.cnf" (is required!):
bind-address = 127.0.0.1
Works for me!
Run the following:
$ mysql -u root -p
mysql> GRANT ALL ON *.* to root#'ipaddress' IDENTIFIED BY 'mysql root password';
mysql> FLUSH PRIVILEGES;
mysql> exit
Then attempt a connection from the IP address you specified:
mysql -h address-of-remove-server -u root -p
You should be able to connect.
You can slove the problem of MariaDB via this command:
Note:
GRANT ALL ON *.* to root#'%' IDENTIFIED BY 'mysql root password';
% is a wildcard. In this case, it refers to all IP addresses.
To remotely access database Mysql server 8:
CREATE USER 'root'#'%' IDENTIFIED BY 'Pswword#123';
GRANT ALL PRIVILEGES ON *.* TO 'root'#'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;
GRANT ALL PRIVILEGES ON *.* TO 'user'#'ipadress'
START MYSQL using admin user
mysql -u admin-user -p (ENTER PASSWORD ON PROMPT)
Create a new user:
CREATE USER 'newuser'#'%' IDENTIFIED BY 'password'; (% -> anyhost)
Grant Privileges:
GRANT SELECT,DELETE,INSERT,UPDATE ON db_name.* TO 'newuser'#'%';
FLUSH PRIVILEGES;
If you are running EC2 instance don't forget to add the inbound rules in security group with MYSQL/Aurura.
Edit File:
/etc/mysql/percona-server.cnf
Append below code in file.
[mysqld]
bind-address = 0.0.0.0
Create user for remote access.
$ mysql -u root -p
mysql> GRANT ALL ON *.* to snippetbucketdotcom#'%' IDENTIFIED BY 'tejastank';
mysql> FLUSH PRIVILEGES;
mysql> exit
All linux server works,
For MSWin c:\ Find insatallation location \ file path
Just create the user to some database like
GRANT ALL PRIVILEGES ON <database_name>.* TO '<username>'#'%' IDENTIFIED BY '<password>'
Then go to
sudo nano /etc/mysql/mysql.conf.d/mysqld.cnf and change the line bind-address = 127.0.0.1 to bind-address = 0.0.0.0
After that you may connect to that database from any IP.
Open your mysql console and execute the following command (enter your database name,username and password):
GRANT ALL ON yourdatabasename.* TO admin#'%' IDENTIFIED BY
'yourRootPassword';
Then Execute:
FLUSH PRIVILEGES;
Open command line and open the file /etc/mysql/mysql.conf.d/mysqld.cnf using any editor with root privileges.
For example:
sudo nano /etc/mysql/mysql.conf.d/mysqld.cnf
Then comment out the below line:
bind-address = 127.0.0.1
Restart mysql to reflect the changes using command:
sudo service mysql restart
Enjoy ;)
You need to change the mysql config file:
Start with editing mysql config file
vim /etc/mysql/my.cnf
add:
bind-address = 0.0.0.0
what worked for on Ubuntu is granting all privileges to the user:
GRANT ALL PRIVILEGES ON *.* TO 'root'#'%' IDENTIFIED BY 'yourpassword' WITH GRANT OPTION;
and setting the bind address in /etc/mysql/mysql.conf.d/mysqld.cnf:
bind-address = 0.0.0.0
then restarting the mysql daemon:
service mysql restart
Go to this directory "/etc/mysql/mysql.conf.d" then
edit this file " mysqld.cnf"
$nano mysqld.cnf
bind-address = 127.0.0.1
mysqlx-bind-address = 127.0.0.1
edit to
bind-address = 0.0.0.0
mysqlx-bind-address = 0.0.0.0
In website panels like cPanel you may add a single % (percentage sign) in allowed hostnames to access your MySQL database.
By adding a single % you can access your database from any IP or website even from desktop applications.
For example in my CentOS
sudo gedit /etc/mysql/my.cnf
comment out the following lines
#bind-address = 127.0.0.1
then
sudo service mysqld restart
If you want to grant remote access of your database from any IP address, run the mysql command and after that run the following command.
GRANT ALL PRIVILEGES ON *.*
TO 'root'#'%'
IDENTIFIED BY 'password'
WITH GRANT OPTION;
I see there are many answers, but they are quite long ones except for the accepted answer, which is quite short and lacks explanation. As I can't edit it, I am adding my answer. Adit asked about:
making this database public so everyone can access it
GRANT ALL PRIVILEGES
ON database.*
TO 'username'#'remote_host'
IDENTIFIED BY 'password';
Above code grants permissions for a user from a given remote host, you can allow a user to connect from any remote host to MySQL by changing TO 'username'#'yourremotehost' to TO 'username'#'%'.
So, the corrected query for granting permissions to a user to connect from any remote host is:
GRANT ALL PRIVILEGES
ON database.*
TO 'username'#'%'
IDENTIFIED BY 'password';
You can disable all security by editing /etc/my.cnf:
skip-grant-tables