I08. How Do I Keep Signatures Of Anti-Spam Service Update - ZyXEL Communications ZyWALL 5 Support Notes

If you choose to tag them, then you still have the spam email traffic on your mail server and everybody
has to set a rule in outlook to filter the spam emails into a dedicated folder.
3. Recommendation
Most IT managers choose "tag" spam emails, which is also our recommendation although
ZyWALL/Mailshell Anti-Spam technology performs very low false-positive.
I07. What's the specification of Anti-Spam feature in ZyNOS v4.01?
Supported protocols
Action on spam emails
Default Setting
Maximum concurrent sessions ZyWALL 5: 5

I08. How do I keep signatures of Anti-Spam service update?

From the current design, there is no local spam signature database maintained on the ZyWALL UTM
devices. As a result, you don't have to update the AS signature for the device. The transactions and
queries between AS-enabled ZyWALL devices and our rating server are taking place dynamically and
automatically in the background.
However, you may want to maintain your own black list/white list on device to maximize the
effectiveness of the Anti-Spam security service.
J. Content Filter FAQ
J01. What's the operation between ZyXEL appliance and BlueCoat data center?
Whenever a PC behind ZyXEL appliance issues HTTP requests to some public WEB server. ZyXEL
appliance will forward the request to the targeted WEB server, but also issue an categorization query to
BlueCoat data center. When the HTTP response is back to ZyXEL appliance, the appliance will hold the
response for a while, and wait for the query result from the BlueCoat data center. If the query is not back
within 10 seconds (by default setting), ZyXEL appliance will block (by default setting) the HTTP
response to the PC. If the query is back, ZyXEL appliance will drop or forward the request according to
Specifications of Anti-Spam feature
POP3 and SMTP protocol
For Pop3, it can "tag" the spam email;
For SMTP, it can do "tag" and "block".
Enable Tag with [SPAM]/[PHISHING] subject
ZyWALL 35: 15
ZyWALL 70: 30
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ZyWALL 5 Support Notes
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