Heres a LINK that will test your firewall
I am using ZA 2006 pro and I find that I frequently get the following kind of message: "The firewall has blocked network acess to your computer [NetBIOS Session] from 192.168.1.101 [TCP Port 1040][TCP Flags:S]. Today just for fun I coppied down the various Ports that came with this message: 1075, 1082, 1089, 1045, 1049, 1050, 1051, 1051, 1052, 1073, 1079, 1086, 1087. All of this came about within an hour or so. Just what is the significance of this? I didn't realize that I had so many ports. And why are they trying to be accessed.