Remote Connections Mysql Ubuntu - mysql

Question

For some reason, I've been unable to connect remotely to my MySQL server. I've tried everything and I'm still getting errors.
root#server1:/home/administrator# mysql -u monty -p -h www.ganganadores.cl
Enter password:
ERROR 1045 (28000): Access denied for user 'monty'#'server1.ganganadores.cl' (using password: YES)
Now, I've tried running
GRANT ALL ON *.* to monty#localhost IDENTIFIED BY 'XXXXX';
GRANT ALL ON *.* to monty#'%' IDENTIFIED BY 'XXXXXX';`
and still nothing!
What I'm doing wrong?
EDIT: my.cnf has commented out the bind ip .

Answer 1

To expose MySQL to anything other than localhost you will have to have the following line
For mysql version 5.6 and below
uncommented in /etc/mysql/my.cnf and assigned to your computers IP address and not loopback
For mysql version 5.7 and above
uncommented in /etc/mysql/mysql.conf.d/mysqld.cnf and assigned to your computers IP address and not loopback
#Replace xxx with your IP Address
bind-address = xxx.xxx.xxx.xxx
Or add a
bind-address = 0.0.0.0 if you don't want to specify the IP
Then stop and restart MySQL with the new my.cnf entry. Once running go to the terminal and enter the following command.
lsof -i -P | grep :3306
That should come back something like this with your actual IP in the xxx's
mysqld 1046 mysql 10u IPv4 5203 0t0 TCP xxx.xxx.xxx.xxx:3306 (LISTEN)
If the above statement returns correctly you will then be able to accept remote users. However for a remote user to connect with the correct priveleges you need to have that user created in both the localhost and '%' as in.
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,
FLUSH PRIVILEGES;
EXIT;
If you don't have the same user created as above, when you logon locally you may inherit base localhost privileges and have access issues. If you want to restrict the access myuser has then you would need to read up on the GRANT statement syntax HERE If you get through all this and still have issues post some additional error output and the my.cnf appropriate lines.
NOTE: If lsof does not return or is not found you can install it HERE based on your Linux distribution. You do not need lsof to make things work, but it is extremely handy when things are not working as expected.
UPDATE: If even after adding/changing the bind-address in my.cnf did not work, then go and change it in the place it was originally declared:
/etc/mysql/mariadb.conf.d/50-server.cnf

Answer 2

Add few points on top of apesa's excellent post:
1) You can use command below to check the ip address mysql server is listening
netstat -nlt | grep 3306
sample result:
tcp 0 0 xxx.xxx.xxx.xxx:3306 0.0.0.0:* LISTEN
2) Use FLUSH PRIVILEGES to force grant tables to be loaded if for some reason the changes not take effective immediately
GRANT ALL ON *.* TO 'user'#'localhost' IDENTIFIED BY 'passwd' WITH GRANT OPTION;
GRANT ALL ON *.* TO 'user'#'%' IDENTIFIED BY 'passwd' WITH GRANT OPTION;
FLUSH PRIVILEGES;
EXIT;
user == the user u use to connect to mysql ex.root
passwd == the password u use to connect to mysql with
3) If netfilter firewall is enabled (sudo ufw enable) on mysql server machine, do the following to open port 3306 for remote access:
sudo ufw allow 3306
check status using
sudo ufw status
4) Once a remote connection is established, it can be verified in either client or server machine using commands
netstat -an | grep 3306
netstat -an | grep -i established

Answer 3

MySQL only listens to localhost, if we want to enable the remote access to it, then we need to made some changes in my.cnf file:
sudo nano /etc/mysql/my.cnf
We need to comment out the bind-address and skip-external-locking lines:
#bind-address = 127.0.0.1
# skip-external-locking
After making these changes, we need to restart the mysql service:
sudo service mysql restart

Answer 4

You are using ubuntu 12 (quite old one)
First, Open the /etc/mysql/mysql.conf.d/mysqld.cnf file (/etc/mysql/my.cnf in Ubuntu 14.04 and earlier versions
Under the [mysqld] Locate the Line,
bind-address = 127.0.0.1
And change it to,
bind-address = 0.0.0.0
or comment it
Then, Restart the Ubuntu MysQL Server
systemctl restart mysql.service
Now Ubuntu Server will allow remote access to the MySQL Server, But still you need to configure MySQL users to allow access from any host.
User must be 'username'#'%' with all the required grants
To make sure that, MySQL server listens on all interfaces, run the netstat command as follows.
netstat -tulnp | grep mysql
Hope this works !

Answer 5

If testing on Windows, don't forget to open port 3306.

Answer 6

In my case I was using MySql Server version: 8.0.22
I had to add
bind-address = 0.0.0.0
and change this line to be
mysqlx-bind-address = 0.0.0.0
in file at
/etc/mysql/mysql.conf.d
then restart MySQL by running
sudo service mysql restart

Answer 7

I was facing the same problem when I was trying to connect Mysql to a Remote Server. I had found out that I had to change the bind-address to the current private IP address of the DB server.
But when I was trying to add the bind-address =0.0.0.0 line in my.cnf file, it was not understanding the line when I tried to create a DB.
Upon searching, I found out the original place where bind-address was declared.
The actual declaration is in : /etc/mysql/mariadb.conf.d/50-server.cnf
Therefore I changed the bind-address directly there and then all seems working.