Hidden Ports

[Eduardo Sorensen <ovo () osite com br>]

Can a port scanner not see a port that is opened?

The question is: can a backdoor be on a machine, and with nmap -p 1-,
for example, you couldn't see it?

Thank you,
Eduardo


---------------------------------------------------------------------------
Ethical Hacking at InfoSec Institute. Mention this ad and get $720 off any 
course! All of our class sizes are guaranteed to be 10 students or less. 
We provide Ethical Hacking, Advanced Ethical Hacking, Intrusion Prevention, 
and many other technical hands on courses. 
Visit us at http://www.infosecinstitute.com/securityfocus to get $720 off 
any course!  
----------------------------------------------------------------------------