Restricting MySQL 3306 port to localhost with IPTABLES

Question

I am trying to restrict MySQL 3306 port on a linux machine from making any connections to anything other than localhost to prevent outside attacks. i have the following code, i

Answer 1

iptables -A INPUT -p tcp --dport 3306 -s 127.0.0.1 -d 127.0.0.1 -j ACCEPT

The above rule is for converting two lines into single one.

Answer to your second question:

If you do not want to provide mysql access from other than localhost, then it is perfect to configure this way. Simple. :-)