What iptables entries for secure MySQL?

I want to add Ubuntu iptables entries so only the following can access MySQL server on my droplet:

  • my Rails app on that same droplet should be able to get, post, update, delete, etc data on MySQL on that same droplet
  • I should be able to SSH to my droplet and use MySQL.

What iptables entries will make these secure restrictions possible?

Thanks in advance!

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Make sure that in <strong>/etc/mysql/my.cnf</strong> you have the following entry: <br><pre>bind-address =</pre>

MySQL listens on the loopback interface by default so outer access to port 3306 will not be allowed (it will timeout as there’s nothing listening publicly on port 3306). <br> <br>You don’t have to set up any iptables rules as it’s pretty much secure by default as long as there are no users that are able to connect without a password.

Yes, everything is on the same droplet.