ClearOS Documentation

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Gateway Antivirus

The Gateway Antivirus app protects your network from viruses. The engine is used by various parts of your ClearOS system:

Installation

If your system does not have this app available, you can install it via the Marketplace.

You can find this feature in the menu system at the following location:

Gateway|Antimalware|Gateway Antivirus

ClearCenter Antimalware Updates

The open source ClamAV solution is the antivirus engine used in ClearOS. This software automatically checks for updates several times a day for new antivirus signatures. This is already included in ClearOS for free!

https://clearos.com/dokuwiki2/lib/exe/fetch.php?media=omedia:clearsdn-icon-xxs.png In addition, the ClearCenter Antimalware Updates service provides additional daily signature updates to improve the effectiveness of the antivirus system. These signatures are compiled from third party organizations as well as internal engineering resources from ClearCenter. We keep tabs on the latest available updates and fine tune the system so you can focus on more important things.

Configuration

Block Encrypted Files

Some file formats, including zip files, can be optionally encrypted and password-protected. The antivirus system is not able to properly scan these password-protected files. Since many virus writers use this technique to bypass virus checking, you may want set your network policy to completely block encrypted files.

If you are expecting a file attachment and you don't receive it, it may be encrypted or password-protected. You can try *temporarily* disabling this feature before the file is resent. For the safety of your network and users, please make sure to reenable this feature after you've received the expected file.

Maximum Files in Zip Files

When the antivirus system unpacks a compressed archive (zip file), a limit on the number of files is recommended to protect the system from a potential denial of service attack. For this reason, we do not recommend setting this to unlimited.

Maximum File Size in Zip Files

The vast majority of viruses are delivered in small files. In order to preserve system resources, any file over the Maximum File Size limit will not be scanned for viruses.

Maximum Recursion in Zip Files

A zip file can contain a zip file, which contains a zip file, inside another zip file, within a zip file, etc. This technique of embedding multiple layers of zip files can be used to create a denial of service attack. Keep this setting at the default unless you have very unusual requirements.

content/en_us/7_ug_antivirus.txt · Last modified: 2018/04/30 07:33 by nickh

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