UTM Related
B
05
2
FAQ
2.4
ZyWALL UTM Solution
B08.Can I insert ZyWALL Turbo Card and a wireless LAN card into the
ZyWALL?
No. Your ZyWALL comes with one expansion slot. You can only insert one card (a ZyWALL Turbo Card
or a wireless LAN card) into the ZyWALL.
B09. What's the difference between a gateway Anti-Spam and a client-
based Anti-Spam filter?
A gateway Anti-Spam (such as your ZyWALL) is deployed on the network edge to inspect e-mail as
they arrive to the mail server(s) and internal hosts. A client-based Anti-Spam filer (such as the one
that comes with major email programs) is a piece of software installed on a computer to filter spam.
The major differences between the two are:
I. Flexibility and Sensitivity
On the ZyWALL, you can adjust the spam threshold (an index number to determine if an e-mail is
spam or not). By adjusting the spam threshold, you can fine tune the sensitivity of the Anti-Spam
filter. This feature is not available on a client-based Anti-Spam.
II. Phishing
ZyWALL's Anti-Spam can effectively identify phishing e-mail. This is another feature that client-
based Anti-Spam cannot provide.
III. Real-time Anti-Spam Update
ZyWALL's Anti-Spam updates real-time giving you effective spam detection. However, client-based
Anti-Spam only gets updated at specific time intervals (for example. Outlook's Anti-Spam filter is
updated monthly with Windows Update).
ZyWALL's Anti-Spam feature is complementary with client-based Anti-Spam filter.
B10.What if my e-mail service provider or my company mail server already
provides Anti-Spam filter service, is there any other reason why I should still
use ZyWALL Anti-Spam?
Yes, it is recommended that you set up and use ZyWALL's Anti-Spam in addition to any Anti-Spam
filter service that you may already have. This is because:
I. You get additional layer of protection
Since the accuracy rate of Anti-Spam filters differ, the ZyWALL double-tags spam e-mails that are
already tagged from the other Anti-Spam filter service to give you the reassurance that important
customer e-mail are not accidentally tagged as spam and deleted. Furthermore, the ZyWALL may
catch spam that are undetected by the other Anti-Spam filter service, thus giving you additional
layer of spam protection.
II. You get protection from phishing
Phishing, being a new scam method, may not be detected by the other Anti-Spam filter service.
This is compensated by ZyWALL's intelligent Anti-Spam phishing detection.
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