We do have the logs Scott and will be following up on your suggestions, but
we know the Qualys Guard scan is running during the time the "attack"
happens so there is a strong link there.

Analysis starts in earnest today.

Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects

-----Original Message-----
From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Scott
Sent: Thursday, September 11, 2014 8:30 PM
To: Web Enabling the IBM i (AS/400 and iSeries); 'Midrange L'
Subject: Re: [WEB400] Experience with Qualys Guard (cross posted on web400
as well)

Do you have access to the logs (access.log/php.log/error.log)? That would
tell you where the requests are coming from (which can be spoofed) and what
they are requesting, then you could use that as backup to ask them why it is
doing what it is doing, or it might show you that the requests aren't coming
from where you think they are.


On 9/11/2014 8:22 AM, Jim Oberholtzer wrote:

I got a call yesterday from a customer that is having trouble with a
Qualys Guard scan. Apparently it scans systems for vulnerabilities
but when it comes to a port that has a PHP server on it (in this case
Zend Server), it starts sending over 1000 transactions a second at it, so
it becomes a DOS
attack. Qualys firmly denies doing a DOS but I can't understand why the
burst of transactions. Any thoughts?


Jim Oberholtzer

Chief Technical Architect

Agile Technology Architects

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