Of course, it simply has these ports closed, 21, 139, etc. I probed the ports on my NT box connected to the Linksys router using port sniffing utility, Socket Sifter, running on a Mac laptop and these ports did not exist. Once I've set the router to forward these ports to the NT box, the utility was able to penetrate them.
The guy who runs Shields Up (Gibson Research) is Steve Gibson not Mitnick I believe, and this site is legit, not a scam.
Zak