ZyXEL Communications ZyWALL 1100 User Manual page 494

The following table describes the labels in this screen.
Table 200 Configuration > UTM Profile > Anti-Spam > DNSBL
LABEL DESCRIPTION
Show Advanced Click this button to display a greater or lesser number of configuration fields.
Settings / Hide
Advanced Settings
Enable DNS Black List Select this to have the ZyWALL/USG check the sender and relay IP addresses in e-
(DNSBL) Checking mail headers against the DNSBL servers maintained by the DNSBL domains listed in
the ZyWALL/USG.
DNSBL Spam Tag Enter a message or label (up to 15 ASCII characters) to add to the beginning of the
mail subject of e-mails that have a sender or relay IP address in the header that
matches a black list maintained by one of the DNSBL domains listed in the ZyWALL/
USG.
This tag is only added if the anti-spam policy is configured to forward spam mail with
a spam tag.
DSBNL X-Header Specify the name and value for the X-Header to be added to e-mails that have a
sender or relay IP address in the header that matches a black list maintained by one
of the DNSBL domains listed in the ZyWALL/USG.
Max. IPs Checking Per Set the maximum number of sender and relay server IP addresses in the mail header
Mail to check against the DNSBL domain servers.
IP Selection Per Mail Select first N IPs to have the ZyWALL/USG start checking from the first IP address in
the mail header. This is the IP of the sender or the first server that forwarded the
mail.
Select last N IPs to have the ZyWALL/USG start checking from the last IP address in
the mail header. This is the IP of the last server that forwarded the mail.
Query Timeout
Setting
SMTP Select how the ZyWALL/USG is to handle SMTP mail (mail going to an e-mail server)
if the queries to the DNSBL domains time out.
Select drop to discard SMTP mail.
Select forward to allow SMTP mail to go through.
Select forward with tag to add a DNSBL timeout tag to the mail subject of an SMTP
mail and send it.
POP3 Select how the ZyWALL/USG is to handle POP3 mail (mail coming to an e-mail client)
if the queries to the DNSBL domains time out.
Select forward to allow POP3 mail to go through.
Select forward with tag to add a DNSBL timeout tag to the mail subject of an POP3
mail and send it.
Timeout Value Set how long the ZyWALL/USG waits for a reply from the DNSBL domains listed
below. If there is no reply before this time period expires, the ZyWALL/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 ZyWALL/USG forwards if queries to the DNSBL domains time out.
Timeout X-Header Specify the name and value for the X-Header to be added to e-mails that the
ZyWALL/USG forwards if queries to the DNSBL domains time out.
DNSBL Domain List
Add Click this to create a new entry.
Edit Select an entry and click this to be able to modify it.
Remove Select an entry and click this to delete it.
Chapter 30 Anti-Spam
ZyWALL/USG Series User's Guide
494