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From: etomcat at (Feher Tamas)
Subject: Re: Hi! Antiviruses Comparison - A Little Research Results


>> Only finnish F-Secure and american CA has Windows/Linux AV 
>>products with multiple independent virus scanning engines.
>Not exactly. At least Chinese from Kingsoft
>uses 2 kernels. As far  as  I  know  Russian  Dr.Web works
>on engine to work with multiple antiviral kernels of
>different vendors.

There is a big difference between using multiple "scan engines" and 
being able to integrate several AV software under one hood or GUI by 
passing them relatively high level calls.

The latter gives poor performance, kinda Amavis-like or a similar to a 
snail in reverse gear.

Only the engine-level (.DLL based) approach can be used for on-access 
protection, which is mainly a Windows requirement. Even this has 
performance penalty, but it is usable (especially on the corporate 
desktops, where users simply cannot disable that annoying realtime 

Writing multiple engine AV software can be a tricky task, I guess. For 
example there is no standard virus naming across different AV 
developers, yet the user interface must display relatively coherent info 
for the poor PC owner when a virus is found.

MS says Windows 2003.NET Server OS now supports running any two 
different AV software on the same machine, without interference of real-
time protection modules or other function. This could allegedly alleviate 
the need to develop multiple-engined AV software. The feature 
reportedly works in 95% of all cases, but that unlucky 5% could still be 
a lot of people.

I think Linux people should agree on single a disk access monitoring 
module standard (dazuko or other) so that Linux AV can easily watch 
absolutely any disk access in the system, not just Samba or Squid. 
Soon, LinuxAV will be just as indispensible, as Windows AV already is.

Sincerely: Tamas Feher.

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