Norton Internet Security 2010 blocking port?

Hello all. 

 

I am running Norton Internet Security on a 32-bit Vista machine.  I am starting a class on Oracle and I finally got the software to install, but there is one program (iSQL*Plus) that I cannot get connected to.  I'm wondering if maybe the firewall in NIS is blocking the port that that program is listening for and thus blocking me from connecting.  How can I find out if NIS is indeed blocking a port and, if it is, how do I get NIS to not block it?

 

I hope that makes sense.

 

Thanks!

Eric