ZyXEL Communications Centralized Network Management Vantage CNM, Руководство пользователя

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Chapter 6 Device Security Settings
Vantage CNM User’s Guide
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The following table describes the labels in this screen.
Table 56 Device Operation > Device Configuration > Security > Anti-Spam > External DB
LABEL DESCRIPTION
External Database
Enable External
Database Enable the anti-spam external database feature to have the device calculate
a digest of an e-mail and send it to an anti-spam external database.
The anti-spam external database sends a spam score for the e-mail back to
the device.
Spam Threshold The anti-spam external database checks an e-mail’s digest and sends back a
score that rates how likely the e-mail is to be spam. The possible range for the
spam score is 0~100. The closer the score is to 100, the more likely the e-
mail is to be spam.
Set the spam threshold (from 0 to 100) for considering an e-mail to be spam.
The device classifies any e-mail with a spam score greater than or equal to
the threshold as spam. It classifies any e-mail with a spam score less than the
threshold as not being spam.
A lower threshold catches more spam e-mails, but may also classify more
legitimate e-mail as spam.
A higher threshold lessens the chance of classifying legitimate e-mail as
spam, but may allow more spam to get through.
Action for No Spam
Score Use this field to configure what the device does if it does not receive a valid
response from the anti-spam external database.
If the device does not receive a response within seven seconds, it sends the
e-mail digest a second time. If the device still does not receive a response
after another seven seconds, it takes the action that you configure here. The
device also takes this action if it receives an invalid response.
Here are possible reasons that would cause the device to take this action:
1. The device was not able to connect to the anti-spam external database.
2. The device connected to the anti-spam external database, but there was no
HTTP response within seven seconds.
3. The device received an error code from the anti-spam external database.
4. The device received an invalid spam score (for example a number higher
than 100).
5. The device received an unknown response to the anti-spam query.
Tag for No Spam
Score Enter a message or label (up to 16 ASCII characters) to add to the mail
subject of e-mails that it forwards if a valid spam score was not received
within ten seconds.
Forward SMTP &
POP3 mail with tag in
mail subject Select this radio button to have the device forward mail with the tag that you
define.
Discard SMTP mail.
Forward POP3 mail
with tag in mail subject Select this radio button to have the device discard SMTP mail. The device will
still forward POP3 mail with the tag that you define.
External Database
Service Status This read-only field displays the status of your anti-spam external database
service registration and activation.
License Inactive displays if you have not successfully registered and
activated the anti-spam external database service.
License Inactive and the date your subscription expired display if your
subscription to the anti-spam external database service has expired.
License Active and the subscription expiration date display if you have
successfully registered the device and activated the anti-spam external
database service.
Trial Active and the trial subscription expiration date display if you have
successfully registered the device and activated the anti-spam external
database service trial subscription.