cant connect database server using ip address

Question

I am using PHP and MySQL to make a database connection , problem is :

the web application project in my local machine when am trying connect to database remote server every thing is work fine

mysql_connect("x.xx.xx.x","username","password") or die(mysql_error());

when i deploy the web application in the remote server that have the mysql database and try to use that web application am getting no database error connection !! if i change database connection to :

mysql_connect("localhost","username","password") or die(mysql_error());

using localhost (127.0.0.1) instead of using ip address ever thing work fine , i have tried check /etc/my.conf file and add bind-address=192.168.15.15 and restart mysql server still cant connect to database
any idea !!!

Answer 1

You need to check two things. First, make sure the port 3306 is open for connections. Second, if you're connecting remotely, you'll need to create a wildcard user (The host will be a percentage sign % ). Take a look at the mysql.user table. If the user you're trying to connect to has a Host of localhost , you won't be able to connect remotely.

To create a new user:

CREATE USER 'newuser'@'%' IDENTIFIED BY 'password';

Give that user permissions, I suggest to only the database in question:

GRANT ALL PRIVILEGES ON your_database.* TO 'newuser'@'%';

Finally, reload the privileges:

FLUSH PRIVILEGES;

Answer 2

问题是我启用了SElinux，所以我用commad启用了httpd网络：

setsebool -P httpd_can_network_connect=1