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Re: nmap showing port 21 (ftp) open, but port is actually closed
From: "cy.wang" <wangchunying () snda com>
Date: Mon, 12 Sep 2005 17:19:45 +0800

can you telnet to its port 21 ? maybe it's an open port not for FTP service .
or , nmap possibly got fooled by some msg that ids/firewall returned


c.y. wang
security analysis engineer
Shanda Interactive Entertainment Co. Ltd, Shanghai, China.
Phone: +86-21-50504740-5046
Email: wangchunying () snda com
----- Original Message ----- 
From: "Mike Jones" <sopiaz57 () gmail com>
To: <pen-test () securityfocus com>
Sent: Friday, September 09, 2005 9:47 PM
Subject: nmap showing port 21 (ftp) open, but port is actually closed

Has anyone ever seen this before, nmap is showing port 21 to be open on 
a machine on the internet, but 21 is not listening on that machine.  It 
happens to all machines I scan outside the local area network.

Thanks in advance

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