Re: how deep do i need to dive ?

From: Beowulf (beowulf_at_nowhere.net)
Date: 03/28/04 

Date: Sun, 28 Mar 2004 08:51:54 -0600

On Sun, 28 Mar 2004 06:07:03 +0000, Ari Rankum wrote:
..
> done that, you might avail yourself of the "ShieldsUp" test at
> www.grc.com, or some similar over-the-net scanner. In the end, you'll
> have learned a lot and probably made yourself safe against all but the
> mob and government organizations.

The ShieldsUp scan at grc.com showed no open ports, but many ports were in
what it called "stealth" mode. Can anybody explain what that means, and
more importantly its significance as regards computer security?