RE: nmap showing port 21 (ftp) open, but port is actually closed

["Drage, Nick" <nick.drage () eds com>]

> Is it 'closed' or firewalled?  A firewalled port will show as 
> filtered since it will not receive the response reporting that 
> it is closed.
> Therefore, it cannot be distinguished between open/filtered.

I presume that you're referring to UDP scans, whereas for this FTP
related issue its likely that TCP is being used.  If not please explain,
because I'm missing something if that's the case.

-- 
Nick Drage
EDS UK Penetration Testing Team

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