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
iptables -A INPUT -p tcp --dport 3306 -j DROP

If you want to remove the filtering, use this:

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

Note: Both might require root, so: sudo iptables (...)