However I have found that after running BOTH firewalls (firestarter and GUFW) through the following fairly comprehensive free test at
https://www.securitymetrics.com/portscan.adp I have found BOTH scanners to be basically exactly the same as far as stealthing your ports proper. So I don't know, I'm just one for some beefed up security, so maybe I'll see what happens to run some of my favorite firewalls through wine...that should be fun to try, I however believe this will fail...too bad, would of been nice maybe. You never know though, maybe I will get some kind of something good working. I just liked the article, but it seems that BOTH of those firewalls offer same protection even though one is much much older in code. We need some good bleeding edge and yet user friendly firewalls in the vein of PC TOOLS FIREWALL PLUS freeware firewall, that one is nice and good protection, but still easy enuf to not have to spend your life configuring. Actually the linux firewalls are like that also, but they miss the nice function of being able to block by application usually, thats a big thing that needs improving to me for the 5-6 standard linux firewalls I tried out.
Actually just ran the little low resource beauty freeware windows firewall in wine
http://www.ghostsecurity.com/ghostwall/ and it installs and runs just fine of coarse, but doesn't block any of the ports, suppose it's because linux works with IPtables as the firewall service, and of coarse a windows program would be unfamiliar with that, wonder if their is any special wine tricks I could do that would give me such functionality, maybe I will look into it, but it's really not too necessary, I can find adequate protection on linux, I just like double sometimes.