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Security Basics: RE: an error in the NMAP docs?

RE: an error in the NMAP docs?

From: Michael Herz <mherz_at_uwaterloo.ca>
Date: Thu, 7 Apr 2005 16:15:14 -0400

> -----Original Message-----
> From: David Gillett [mailto:gillettdavid_at_fhda.edu]
>
> The *purpose* of the exception is NOT "to allow the machine to act
> as a DNS server". Its purpose is to allow the client to
> receive DNS results even when these are returned using TCP
> instead of UDP.

This is exactly what I'm saying too. Right from the beginning I belive ;-)

> The NMAP docs describe exploiting a FIREWALL configuration
> intended to allow machines to act as DNS and FTP CLIENTS.

And this is what I disagree with. To me, the phrase "allow DNS (53) or
FTP-DATA (20) packets to come through" implies a server service (ie.
requests are coming in to my DNS server on port 53).

Sorry for turning this into so many words :-(

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Received on Apr 08 2005

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