Chapter 22 Anti-Spam
ZyWALL (ZLD) CLI Reference Guide
195
22.2.4.1 DNSBL Example
This example:
• Sets the ZyWALL to use “DNSBL-example.com” as a DNSBL.
• Turns DNSBL checking on.
• Sets the ZyWALL to forward POP3 mail with a tag if the queries to the DNSBL domains
time out.
• Sets the ZyWALL to check up to 4 sender and relay server IP addresses in e-mail headers
against the DNSBL.
• Sets the ZyWALL 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”.
• Displays the DNSBL statistics.
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
blacklist maintained by a DNSBL domain.
dnsbl-timeout displays the message or label to add to the
mail subject of e-mails that the ZyWALL 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 ZyWALL waits for a reply from the DNSBL
domains.
show anti-spam dnsbl query-timeout
time
Displays how long the ZyWALL waits for a reply from the
DNSBL domains.
Table 110 DNSBL Commands
COMMAND DESCRIPTION
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