Question : Freebsd Configure firewall

Hi there,
I need to adjust My firewall in FREEBSD to allow MYSQL connection from an external ip,
the external ip is static.

Incase it matters this is my setup.

#1 Server - switch - Modem ---- (#2 Server with Static IP)

Im totally lost inside the freebsd configurations
Exactly which file is the firewall configuration
and how to adjust it to my needs.

I use standard port  3306 , and my router is already configured.

Answer : Freebsd Configure firewall

Do you have a firewall installed/enabled at all? You might only have to configure mysql to accept outside connections:
http://www.cyberciti.biz/tips/how-do-i-enable-remote-access-to-mysql-database-server.html