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 <[EMAIL PROTECTED]> 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 > > --------------------------------------------------------------------------- > ---------------------------------------------------------------------------- > ________________________________________________________________________ Want to chat instantly with your online friends? Get the FREE Yahoo! Messenger http://uk.messenger.yahoo.com/ --------------------------------------------------------------------------- ----------------------------------------------------------------------------
