Is Cyren Zero-hour Antivirus effective (and if so, what is its effectiveness?).
Problem reported by Gabriele Maoret - SERSIS - 12/11/2019 at 6:09 AM
Resolved
Is Cyren Zero-hour Antivirus effective (and if so, what is its effectiveness?).

I did a simple test: normally on our SmarterMail server 15 to 30 viruses are captured every day by ClamAV (source: Reports -> Viruses Caught).
By disabling ClamAV and enabling the 30-day Cyren test, the report above is always left at 0 (no viruses captured).
The Cyren report (Reports -> Cyren Zero-hour Antivirus) always reports 0 "Confirmed Virus" and some (few, 1 to 5 max) "High" or "Medium".
Even the "Non Virus" remain at 0, while I have several thousand "Unknown".

So the question is: why do I have to pay for Cyren Zero-hour Antivirus if it doesn't capture anything, and instead ClamAV seems much more effective?

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Gabriele,

Cyren Zero-hour is a service that provides protection in the earliest moments of malware outbreaks and continued protection as each new variant emerges. This service is intended to be used as a complement to conventional antivirus technology as an additional protection against zero-hour virus outbreaks. Because Cyren looks for new variants of malware, we unfortunately can't guarantee that existing viruses should be caught by that service.

Cyren Zero-hour should always be used in conjunction with another antivirus solution such as ClamAV.

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