ZyXEL Communications ZYWALL 1050 - V2.00 EDITION 1 Uživatelská příručka stáhnout pdf (Strana 215)

Chapter 23 Anti-Spam

ZyWALL (ZLD) CLI Reference Guide

215

23.2.3.1 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.

23.2.3.2 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.

23.2.4 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 command to enter the configuration mode before you can use

these commands.

show anti-spam black-list [status] Displays the current anti-spam black list. Use status to

show the activation status only.

show anti-spam tag black-list Show the configured anti-spam black list tag.

Table 117 Commands for Anti-spam White and Black Lists (continued)

COMMAND DESCRIPTION

Router(config)# anti-spam white-list subject testwhite activate

Router(config)# anti-spam white-list e-mail [email protected]

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 Status

Content

==========================================================================

1 subject yes

testwhite

2 e-mail yes

[email protected]

3 mail-header yes

Date : 2007

4 ip-address yes

192.168.1.0 / 255.255.255.0

1 2 ... 210 211 212 213 214 215 216 217 218 219 220 ... 385 386

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