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RE: [lists] Re: About AsyncOS from IronPort
From: "Curt Purdy" <purdy () tecman com>
Date: Sun, 2 Apr 2006 19:32:07 -0400

We use IronPort and I highly recommend it.  Sophos is a great first line of
defense, IronPort's own Anti-SPAM is also a good first line with the
installed BrightMail nicely cleaning 98% of the rest with no false
positives.  Our email admin now actually has time on his hands instead of
working overtime and weekends.

Curt Purdy CISSP, GSNA, GSEC, CNE, MCSE+I, CCDA 
Information Security Officer 
If you spend more on coffee than on IT security, you will be hacked. 
What's more, you deserve to be hacked. 
-- former White House cybersecurity czar Richard Clarke 

 

-----Original Message-----
From: Lynx [mailto:lynx () enemy org] 
Sent: Thursday, March 30, 2006 5:12 PM
To: pen-test () securityfocus com
Subject: [lists] Re: About AsyncOS from IronPort

Hello!

I did an evaluation for sysadmin purposes of an Ironport gateway.

On Mar 30, 2006 at 1659 +0200, carlopmart appeared and said:
 somebody knows which software for MTA, anti-spam engine, 
etc IronPort 
use?. I find that antivirus is sophos.

Antivirus engine is Sophos. The MTA is their own. They 
developed an high-performance MTA for AOL and use it in their 
appliances. The antivirus engine is either Symantec 
Brightmail or again their own antivirus engine.

 - AsyncOS kernel supports more than 10,000 simultaneous 
connections. 
Is this right? Linux and BSD kernels doesn't support this "feature"?

AsyncOS is vere capable and can handle such load. It depends 
on the hardware though. AsyncOS is based on *BSD; Linux and 
*BSD can handle similar loads if configured properly.

 - "IronPort also developed a high performance file system 
and an I/O 
driven scheduler optimized for the asynchronous nature of 
messaging". 
Is this high performance filesystem based on UFS2, ext3, 
reiser, ... 
etc or a new type of filesystem?

I have no information about their filesystem.

 - "For example, 1000 threads,each with a 1MB stack, would 
consume 1 
GB of RAM! [...]" Really??

I think you might have to try it. I believe that the system 
uses load limits when under pressure, but we didn't test that.

Best,
Lynx.


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This List Sponsored by: Cenzic

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protect your applications from hackers. Cenzic has the most comprehensive 
solutions to meet your application security penetration testing and 
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