ZyXEL Communications ZyWall USG20-VPN, Руководство пользователя

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Chapter 28 Anti-Spam
USG20(W)-VPN Series User’s Guide
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28.5 The Anti-Spam Black List Screen
Click Configuration > UTM Profile > Anti-Spam > Black / White List to display the Anti-Spam
Black List screen.
Configure the black list to identify spam e-mail. You can create black list entries based on the
sender’s or relay server’s IP address or e-mail address. You can also create entries that check for
particular e-mail header fields with specific values or specific subject text. Click a column’s heading
cell to sort the table entries by that column’s criteria. Click the heading cell again to reverse the sort
order.
Enable Virus
Outbreak
Detection This scans emails for attached viruses.
Virus Outbreak
Tag Enter a message or label (up to 15 ASCII characters) to add to the beginning of the mail
subject of e-mails that are determined have an attached viruses.
This tag is only added if the anti-spam policy is configured to forward spam mail with a
spam tag.
Virus Outbreak X-
Header Specify the name and value for the X-Header to be added when an email is determined
to have an attached virus.
Query Timeout Settings
SMTP Select how the USG is to handle SMTP mail query timeout.
Select drop to discard SMTP mail.
Select forward to allow SMTP mail to go through.
Select forward with tag to add a tag to an SMTP query timeout mail’s mail subject and
send it on to the destination.
POP3 Select how the USG is to handle POP3 mail query timeout.
Select forward to allow POP3 mail to go through.
Select forward with tag to add a tag to an POP3 query timeout mail’s mail subject and
send it on to the destination.
Timeout Value Set how long the USG waits for a reply from the mail scan server. If there is no reply
before this time period expires, the USG takes the action defined in the relevant
Actions
when Query Timeout field.
Timeout Tag Enter a message or label (up to 15 ASCII characters) to add to the mail subject of e-
mails that the USG forwards if queries to the mail scan servers time out.
Timeout X-Header Specify the name and value for the X-Header to be added when queries to the mail scan
servers time out.
Apply Click Apply to save your changes back to the USG.
Reset Click Reset to return the screen to its last-saved settings.
Table 171
Configuration > UTM Profile > Anti-Spam > Mail Scan
LABEL DESCRIPTION