I have and old PIX and I am tring to find out what the model is. This box has a floppy drive in the front and 6 slots in the back . the power switch ,console failover,and power supply are in the back also.all that I can find to identify what it is is on the back of the box it says "PIX Firewall/LocalDirector". Can this box be upgraded it has 4.4 code now.