ZyXEL Communications ZYWALL 70 - V4.04 Uživatelský manuál stáhnout pdf (Strana 20)

FAQ

2.4

Hands-on

ZyWALL UTM Solution

G03. Is the ZyWALL's Anti-Virus feature implemented as a proxy to process

large files?

No, we don't implement a proxy to store large files for Anti-Virus inspection.

G04. Will ZyWALL be able to inspect an e-mail with a large attachment (for

example, more than 5MB in size) that contains a virus?

Yes. The ZyWALL UTM Anti-Virus feature is able to scan e-mail attachments of any sizes. With a special

algorithm implemented to deal with the file size problem, you can be rest assure that no matter how

big the file size is, it is inspected by your ZyWALL UTM Anti-Virus

G05. What happens if the virus is in the e-mail attachment and that it is

received by a user?

Even if the virus is hidden in a specific file within a file attachment in any part of the e-mail, your

ZyWALL Anti-Virus can still detect and destroy the file portion that is infected. As a result, the user will

get the file but can't open it. Thus, the user's computer will not be infected by the virus.

G06. Could I copy the IDP policy settings from one ZyWALL to another?

Yes. With ZyNOS v4.00, you can always back up your ZyWALL's IDP policy settings to your computer

and import the backed up IDP settings to another ZyWALL using the WebGUI. Thus multiple ZyWALLs

can have the same IDP policy settings.

G07. How do I keep Anti-Virus+IDP signatures updated?

We recommend that you configure your ZyWALL to automatically update the signature on an hourly

basis so that the ZyWALL can check with our Update Server to see if there is new signature available.

However, you can still change the update interval as you wish or perform a manual update anytime.

G08. How often does ZyXEL update Anti-Virus+IDP signatures?

ZyXEL updates Anti-Virus+IDP signature at least 5 times a week. These signatures are fully tested and

the quality assured.

Once new virus is detected, ZyXEL will release the virus signature in the shortest time possible.

Minimizing the impact of any new virus is always the first priority for our Anti-Virus+IDP service

subscribers.

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ZyXEL Communications ZYWALL 70 - V4.04 Uživatelský manuál Strana 20