RE: nmap status question

["Brad Bemis" <Brad.Bemis () airborne com>]

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> A port is in either of the two states ie , open or closed at 
> any point of time. > 

That is not exactly correct.  Ports are not either open or closed. 
Depending on the protocol, there are actually several different states of
activity.  For instance, in TCP - state is managed as an element of the
Transmission Control Block (TCB).  The various TCP states are:  LISTEN,
SYN-SENT, SYN-RECEIVED, ESTABLISHED, FIN-WAIT-1, FIN-WAIT-2, CLOSE-WAIT,
CLOSING, LAST-ACK, TIME-WAIT, and the fictional state CLOSED.  CLOSED is
fictional because it represents the state when there is no TCB, and
therefore, no connection.


Thank you for your time and attention,

========================
Brad Bemis
Information Security Services
Airborne Express
(206) 830-3478
========================
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