Chapter 24 Anti-Spam
ZyWALL (ZLD) CLI Reference Guide
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24.2.4.1 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.
[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 ZyWALL’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 ZyWALL’s list
Table 122 DNSBL Commands
COMMAND DESCRIPTION
Router(config)# anti-spam dnsbl domain DNSBL-example.com activate
Router(config)# show anti-spam dnsbl domain
No. Status
Domain
===========================================================================
1 yes
DNSBL-example.com
Router(config)# anti-spam dnsbl activate
Router(config)# show anti-spam dnsbl status
anti-spam dnsbl status: yes
Router(config)# anti-spam dnsbl query-timeout pop3 forward-with-tag
Router(config)# show anti-spam dnsbl query-timeout pop3
dnsbl query timeout action: forward-with-tag
Router(config)# anti-spam dnsbl max-query-ip 4
Router(config)# show anti-spam dnsbl max-query-ip
dnsbl max query ip: 4
Router(config)# anti-spam dnsbl ip-check-order forward
Router(config)# show anti-spam dnsbl ip-check-order
anti-spam dnsbl IP check order: forward
Router(config)# anti-spam tag dnsbl DNSBL
Router(config)# show anti-spam tag dnsbl
dnsbl tag: DNSBL
Router(config)# anti-spam tag dnsbl-timeout DNSBL-timeout
Router(config)# show anti-spam tag dnsbl-timeout
dnsbl-timeout tag: DNSBL-timeout
Router(config)# show anti-spam dnsbl statistics
DNSBL domain: 1
domain: DNSBL-example.com
average time: 0.00
total query: 0
spam: 0
clear: 0
no timeout: 0
timeout: 0
no response: 0
