Re: nmap status question

[Shaun Moore <shaunige () yahoo co uk>]

To put it very trivially, when a port is "filtered" it
drops packets which do not originate from a trusted IP
address.  Just one example of when port filtering is
used is for "backdoors" or "trojans".  These often
only accept connections from user-specified IP
addresses, and silently ignore all other traffic.

If you want a more detailed and more technically
indeph explanation, I'm sure the Nmap page has some
reference to it in some place or another;
www.insecure.org/nmap


Thank you for your time.
Shaun.  

--- marc brown <marc.brown () watsonwyatt com> wrote: > 
> i am new to linux but after getting my rh9 box
> running
> i have started to use nmap to do some scanning of my
> networks.  can someone tell me exactly what it means
> when the state of a particular port is 'filtered'?  
>
> thanks,
> marc
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