Mike McCarty: > Andrei Popescu wrote: > >> firewall are sometimes called "filtered" (by nmap) or "stealth" (by >> some Windows firewalls). > > A stealthed port appears not to exist to the external world, > but that does not mean that there is no service "listening" > on it.
"Stealthed" almost always means that there is a service listening on
that port, but traffic to it is being filtered somehow. However,
"pretending not to exist" is not possible for a computer with a public
IP address anyway. Even if you drop *every* incoming packet, an attacker
still knows that you are there from the absence of an ICMP message from
your ISP's router that there is no computer with your IP address.
> Also, the term "stealth" has been around longer than Windows
> firewalls, I do believe.
Don't know. It is a marketing term, that's for sure.
J.
--
There is no justice in road accidents.
[Agree] [Disagree]
<http://www.slowlydownward.com/NODATA/data_enter2.html>
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