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Re: nmap showing port 21 (ftp) open, but port is actually closed
From: "Aaron J. Bedra" <abedra () westervillelibrary org>
Date: Mon, 12 Sep 2005 13:07:59 -0400

You guys should really be posting this on the nmap-hackers/nmap-dev
lists.

What version of nmap are you running?  What OS and patch set?

One very key question is are you running any transparent caching proxy
servers?  If so, your results will be incorrect.

Aaron J. Bedra

On Mon, 2005-09-12 at 17:19 +0800, cy.wang wrote:
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

Regards,

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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------------------------------------------------------------------------------
Audit your website security with Acunetix Web Vulnerability Scanner: 

Hackers are concentrating their efforts on attacking applications on your 
website. Up to 75% of cyber attacks are launched on shopping carts, forms, 
login pages, dynamic content etc. Firewalls, SSL and locked-down servers are 
futile against web application hacking. Check your website for vulnerabilities 
to SQL injection, Cross site scripting and other web attacks before hackers do! 
Download Trial at:

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