Remote Connections Mysql Ubuntu

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)

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;

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