Chapter 44 Anti-Spam
ZyWALL Series CLI Reference Guide
409
44.2.3.1 DNSBL Example
This example:
• Sets the Zyxel Device to use “DNSBL-example.com” as a DNSBL.
• Turns DNSBL checking on.
• Sets the Zyxel Device to forward POP3 mail with a tag if the queries to the DNSBL domains time out.
• Sets the Zyxel Device to check up to 4 sender and relay server IP addresses in e-mail headers against
the DNSBL.
• Sets the Zyxel Device to start DNSBL checking from the first IP address in the mail header.
• Sets the DNSBL tag to “DNSBL”.
• Sets the DNSBL timeout tag to “DNSBL-timeout”.
show anti-spam tag {dnsbl | dnsbl-
timeout}
dnsbl displays the anti-spam tag for e-mails that have a
sender or relay IP address in the header that matches a black
list maintained by a DNSBL domain.
dnsbl-timeout displays the message or label to add to the
mail subject of e-mails that the Zyxel Device forwards if queries
to the DNSBL domains time out.
show anti-spam dnsbl statistics
Displays anti-spam DNSBL statistics for each configured DNSBL
domain.
anti-spam dnsbl statistics flush
Clears the anti-spam DNSBL statistics for each configured
DNSBL domain.
anti-spam dnsbl query-timeout time
[1..10]
Sets how long the Zyxel Device waits for a reply from the DNSBL
domains.
show anti-spam dnsbl query-timeout
time
Displays how long the Zyxel Device waits for a reply from the
DNSBL domains.
[no] anti-spam xheader dnsbl mail-
header mail-header-value
Specify the name and value for the X-Header to add to e-mails
with a sender or relay IP address in the header that matches a
black list maintained by a DNSBL domain in the Zyxel Device’s
list
show anti-spam xheader dnsbl
Display the name and value for the X-Header to add to e-mails
with a sender or relay IP address in the header that matches a
black list maintained by a DNSBL domain in the Zyxel Device’s
list
Table 219 DNSBL Commands
COMMAND DESCRIPTION
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