How do I share MySQL port?

Currently, MySQL is not accessible from the network.

I want to share it so that it is *only* accessible from a specific IP address. How do I do this?

Find out what port mySQL is using.
Then ensure that the port is allowed through the firewall.

MySQL usually uses port 3306.
To allow user_ip to access mysql_server_ip, you can use something like :

Code:

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iptables -A INPUT -p tcp -s user_ip --sport 1024:65535 -d mysql_server_ip --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp -s mysql_server_ip --sport 3306 -d user_ip --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT

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But you haven't told anything about your network configuration ...