Difference between revisions of "Email antivirus"

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Omdat virussen zich op allerlei andere manieren dan via e-mail kunnen verspreiden (netwerk shares, floppies, CD-ROMs, www, ...), blijft het voor veel (MS-Windows) gebruikers nog steeds verstandig om op de PC een antivirus-programma te blijven gebruiken, met een recente virusdatabase. De RU heeft een campuslicentie voor het gebruik van McAfee. Zie de [[Software_windows|Windows software-pagina]] voor informatie over welke versies er beschikbaar zijn.
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Omdat virussen zich op allerlei andere manieren dan via e-mail kunnen verspreiden (netwerk shares, floppies, CD-ROMs, www, ...), blijft het voor veel (MS-Windows) gebruikers nog steeds verstandig om op de PC een antivirus-programma te blijven gebruiken, met een recente virusdatabase. De RU heeft een campuslicentie voor het gebruik van McAfee. Zie de [[Microsoft_windows|Windows software-pagina]] voor informatie over welke versies er beschikbaar zijn.
 
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[en]
 
[en]
Since viruses can spread in more ways than mail (network shares, USB-sticks, www, ...) it is good practice for (MS-Windows) users to use a PC virusscanner with a recent virusdatabase. The RU has a campus license for the use of McAfee. See our [[Software_windows|Windows software-page]] for more information about the different versions.
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Since viruses can spread in more ways than mail (network shares, USB-sticks, www, ...) it is good practice for (MS-Windows) users to use a PC virusscanner with a recent virusdatabase. The RU has a campus license for the use of McAfee. See our [[Microsoft_windows|Windows software-page]] for more information about the different versions.
 
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[[Category:Email]]
 
[[Category:Email]]

Revision as of 17:41, 7 November 2007

Filtering of viruses in E-mail

When and how does the filter work?

The C&CZ mailservers, running sendmail, invoke MIMEDefang for each mail they receive, to scan for a virus and filter for spam.

This means that the virus- and spamfilter works for all mail these servers process, whether incoming, outgoing or forwarded.

If a mail contains an attachment with dangerous content, this mail is put into quarantine. The mail without the dangerous attachment, but with an attachment that explains what has happened, is forwarded to the addressee.

An attachment is considered dangerous if it is an executable program, e.g. .exe, .bat, .dll. Since MS-Windows considers zip-files to be directories, and therefore viruses in zip-files appeared, we also consider an executable in a zip-file to be dangerous. In order not to make the list too long (a zip-file in a zip-file in ..., the Dutch chocolate Droste-effect), we also consider a zip-file in a zip-file to be dangerous.

Other antivirus measures

Since viruses can spread in more ways than mail (network shares, USB-sticks, www, ...) it is good practice for (MS-Windows) users to use a PC virusscanner with a recent virusdatabase. The RU has a campus license for the use of McAfee. See our Windows software-page for more information about the different versions.