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External Pentests Obsolete?

To: pen-test@securityfocus.com
Subject: External Pentests Obsolete?
From: "Yiannis Koukouras" <d4rw1n@linuxmail.org>
Date: Thu, 9 Aug 2007 07:18:36 +0000
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Hi all,

Do you think that an external infrastructure pentest is nowadays obsolete?

What I want to say is that, most of the serious companies nowadays will only 
have a few servers on their DMZ (web server, mail server, SSL concentrator, 
terminal server, citrix) and will only allow access to one or two ports for 
each of them. The rest of the infrastructure (excluding the internet facing 
router and firewall) will be completely inaccessible.

Thus, if web application testing is out of scope, there isn?t much to test, is 
it? Only half a dozen of services to check vulnerabilities and 
misconfiguration, check if mail rely is on, make a password bruteforce 
attack(?), check that the DNS can?t be poison and VOILA! You have finished!

Do you think that it is ethical to consult our clients to ?buy? an external 
pentest anymore?

P.S. If I am wrong, PLEASE prove me wrong!

-- 
Ioannis Koukouras
CISSP
MSc in Computer Systems Security
BEng in Electronic Engineering
http://www.linkedin.com/in/ikoukouras 

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