firewall ports to open

[Steve Buehler]

I am trying to allow someone to access our mysql server that is behind our 
firewall.  If I open the firewall ports 3306-65000/tcp the person can get 
through.  If I just try to open up the port 3306/tcp, they can not get 
through.  Is there another port that I need to open also?  I have tried 
3306-3307/tcp but that wasn't it.  Any help would be appreciated.  I have 
also searched the web and could only find that it uses 3306 and 3307, but 
that sounded kind of weird to me.

Thanks
Steve