Testing a Remote MySQL Connection
To test a remote MySQL connection in Linux terminal, simply replace
hostname_or_ip with your own.
mysql -u username -h hostname_or_ip -p
Or via Command Line in Windows:
telnet 220.127.116.11.22 3306
If you are getting an error when trying to connect to your remote MySQL server
ERROR 2003 (HY000): Can't connect to MySQL server on '18.104.22.168.22' (111)
or in Windows Telnet
Connecting To 22.214.171.124.22...Could not open connection to the host, on port 3306: Connect failed
1. Edit MySQL config
You may need to comment out
bind-address in the MySQL config file
mysqld.cnf with nano editor.
sudo nano /etc/mysql/mysql.conf.d/mysqld.cnf
W and search for
# 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
The above line is telling MySQL to only accept local connections (127.0.0.1 / localhost).
If you know the IP that you are trying to remotely connect from, you should enter it here to restrict remote connections to that IP.
If you have to allow all IP addresses to connect, you can comment out the line by adding
# before it so it looks like:
# 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
Note: It is not good security practice to leave your MySQL server accessible to any IP, so consider this a temporary measure.
Restart the MySQL service for changes to take effect.
sudo service mysql restart
2. Check Firewall
If you still can’t connect, check if there is a firewall configured on your server. The most common firewall for Ubuntu server is
ufw is enabled:
sudo ufw status
If it’s enabled, you should see some rules:
To Action From -- ------ ---- OpenSSH ALLOW Anywhere Apache Full ALLOW Anywhere OpenSSH (v6) ALLOW Anywhere (v6) Apache Full (v6) ALLOW Anywhere (v6)
If MySQL is not listed, add a rule for it.
sudo ufw allow mysql
There should be a rule for MySQL:
To Action From -- ------ ---- OpenSSH ALLOW Anywhere Apache Full ALLOW Anywhere 3306 ALLOW Anywhere OpenSSH (v6) ALLOW Anywhere (v6) Apache Full (v6) ALLOW Anywhere (v6) 3306 (v6) ALLOW Anywhere (v6)
sudo service ufw restart
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