slewrate, there's a post from phishphreek80 linking to this arcticle: http://www.antionline.com/showthread...&postid=600309
credits to him for finding it
There's something you might be aware of.. perhaps you may have problems with malware like keyloggers or something like this, that will connect to another host from your computer, in this case, NAT won't protect you because the lamer on the remote side only needs to receive stuff. It could be used like this:
1) you run a trojaned program, it installs itself.
2) everything you type is recorded by the program.
3) from time to time, it opens a connection to a server owned by the attacker. It could be, for instance, a homemade server (using nc, for example) which logs everything to a file. Or the trojan can mail the person, there are some alternatives.
It could hide in a registry key, bat files, and even on mstask (the task scheduler, was thinking about it right now. Ive never seen it being used, and no, I am not giving you (malicious) ideas, but it's something you should check).

So, be careful about what you run.. Now I can see that the bible and firewalls have a relation..
It's not only what enters through your ports that is harmful, but also what leaves them. Argh, this was.. duh!
And you can imagine a trojan that only execute stuff by connecting to somewhere else and retrieving the instructions, instead of leaving an open door. I am glad afaik, they don't do it (the ones I know of), and I am only thinking about possible threats, but if I am thinking about them now, probably hundreds of others did as well.. and perhaps wrote something :sigh: . be careful dude, you are invisible, but there are still things you should take care of. Use a firewall to avoid this menace.
good luck!