[Clamav-users] clamav vs. other virus scanners

2004-01-08 Thread Payal Rathod
Hi all,
Recently I noticed that Norton AV clears more than 60,000 viruses,
maybe other virus scanners also have similar numbers, why do we have a
very less number? Is it because we do not have big database or we
protect against new viruses only and keep new definition updated?
I personally had no problems, cos' I have saved few viruses to test with
clamav and it detected them all. But then I have a LAN of only few
machines. Do other people with big setups and budget prefer commercial
antiviruses to clamav?
Also, is clamav a bit worried that once the database grows big it will
consume more memory and create other problems.

Thanks.
Regards,
-Payal


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Re: [Clamav-users] clamav vs. other virus scanners

2004-01-08 Thread Antony Stone
On Thursday 08 January 2004 12:21 pm, Payal Rathod wrote:

> Hi all,
> Recently I noticed that Norton AV clears more than 60,000 viruses,
> maybe other virus scanners also have similar numbers, why do we have a
> very less number?

Two main reasons:

1. ClamAV has a high proportion of recent viruses, and a lower proportion of 
old viruses.   Other products often count ancient viruses in their list of 
signatures - it looks good for marketing, even if no-one's seen that 
particular bit of code in the wild for 10 years.

2. Many vendors count minor variations in viruses as multiple signatures, 
whereas ClamAV often catches several variations with a single signature.   
Again, the higher number looks good for marketing, even though it really 
means the product is ratehr less efficient at detecting the viruses and has 
to search a bigger database of signatures to achieve the same effect.

Antony.

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Re: [Clamav-users] clamav vs. other virus scanners

2004-01-09 Thread Sancho2k.net Lists
Antony Stone wrote:

On Thursday 08 January 2004 12:21 pm, Payal Rathod wrote:


Hi all,
Recently I noticed that Norton AV clears more than 60,000 viruses,
maybe other virus scanners also have similar numbers, why do we have a
very less number?

2. Many vendors count minor variations in viruses as multiple signatures, 
whereas ClamAV often catches several variations with a single signature.   
Again, the higher number looks good for marketing, even though it really 
means the product is ratehr less efficient at detecting the viruses and has 
to search a bigger database of signatures to achieve the same effect.
Another area where numbers are pumped is in application exploits and 
other non-virus related signatures. Desktop AVs will count signatures 
for things such as Outlook MIME vulnerabilities, spyware, adware, etc. 
Some will trigger "backdoor" warnings on tools that have been 
commercially designed for the purpose of remote administration as well, 
under the guise that users will want to be alerted if such programs are 
found on thier systems.

DS

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