Closed vs Stealthed Ports 
One of the things that I love about computers is you can always try things and see what happens. This ability to experiment can be rather handy as a BS filter and so I thought I would try a little experiment for the closed vs stealthed port debate which can be found here Place your bets - Closed vs Stealthed.

The results are simply that closed ports are not of interest to hackers or worms, as they can't break into either. While I always recommend the use of a firewall which typically results in stealthed ports, closed ports as just as secure with the exception that they could be used in a DOS attack on someone else (read the thread as I don't believe that reflection attacks are very common anymore give the huge bot armies which are available).


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