Dnsbl Anti-Spam Commands - ZyXEL Communications ZYWALL USG CLI Reference Manual

Table 108 Commands for Anti-spam White and Black Lists (continued)
COMMAND
show anti-spam black-list [status]
show anti-spam tag black-list
22.2.3.1 White and Black Lists Example
This example shows how to configure and enable a white list entries for e-mails with
"testwhite" in the subject, e-mails from whitelist@ourcompany.com, e-mails with the Date
header set to 2007, and e-mails from (or forwarded by) IP address 192.168.1.0 with subnet
255.255.255.0.
Router(config)# anti-spam white-list subject testwhite activate
Router(config)# anti-spam white-list e-mail whitelist@ourcompany.com
activate
Router(config)# anti-spam white-list mail-header Date 2007 activate
Router(config)# anti-spam white-list ip-address 192.168.1.0 255.255.255.0
activate
Router(config)# show anti-spam white-list
No. Type
Content
==========================================================================
1 subject
testwhite
2 e-mail
whitelist@ourcompany.com
3 mail-header yes
Date : 2007
4 ip-address
192.168.1.0 / 255.255.255.0
22.2.3.2 Regular Expressions in Black or White List Entries
The following applies for a black or white list entry based on an e-mail subject, e-mail address,
or e-mail header value.
• Use a question mark (?) to let a single character vary. For example, use "a?c" (without the
quotation marks) to specify abc, acc and so on.
• You can also use a wildcard (*). For example, if you configure *def.com, any e-mail
address that ends in def.com matches. So "mail.def.com" matches.
• The wildcard can be anywhere in the text string and you can use more than one wildcard.
You cannot use two wildcards side by side, there must be other characters between them.
• The ZyWALL checks the first header with the name you specified in the entry. So if the e-
mail has more than one "Received" header, the ZyWALL checks the first one.

22.2.4 DNSBL Anti-Spam Commands

This section describes the commands for checking the sender and relay IP addresses in e-mail
headers against DNS (Domain Name Service)-based spam Black Lists (DNSBLs). You must
use the
configure terminal
these commands.
ZyWALL (ZLD) CLI Reference Guide
DESCRIPTION
Displays the current anti-spam black list. Use status to
show the activation status only.
Show the configured anti-spam black list tag.
Status
yes
yes
yes
command to enter the configuration mode before you can use
Chapter 22 Anti-Spam
193