ZyXEL Communications ZLD manual 217

Chapter 24 Anti-Spam

This table describes the DNSBL commands.

Table 122 DNSBL Commands

COMMAND	DESCRIPTION
[no] anti-spam dnsbl activate	Turns DNSBL checking on or off.
anti-spam dnsbl [1..5] domain	Adds or edits a DNSBL domain for checking e-mail header IP addresses.
dnsbl_domain {activatedeactivate}
no anti-spam dnsbl domain dnsbl_domain	Removes the specified DNSBL domain.
anti-spam dnsbl query-timeout smtp {drop	Sets how the ZyWALL handles SMTP mail (mail going to an e-mail server)
forward forward-with-tag}	if the queries to the DNSBL domains time out.
anti-spam dnsbl query-timeout pop3	Sets how the ZyWALL handles POP3 mail (mail coming to an e-mail client)
{forward forward-with-tag}	if the queries to the DNSBL domains time out.
anti-spam dnsbl max-query-ip [1..5]	Sets up to how many sender and relay server IP addresses in the mail
	header to check against the DNSBL.
anti-spam dnsbl ip-check-order {forward	Configures the order in which anti-spam checks e-mail header IP
backward}	addresses against the DNSBLs.
	• forward checks the first N IP addresses. Checking starts from the first
	IP address in the mail header. This is the IP of the sender or the first
	server that forwarded the mail.
	• backward checks the last N IP addresses. Checking starts from the
	last IP address in the mail header. This is the IP of the last server that
	forwarded the mail.
anti-spam tag {dnsbl dnsbl-timeout}	dnsbl configures the message or label to add to the beginning of the mail
[tag]	subject of e-mails that have a sender or relay IP address in the header
	that matches a blacklist maintained by a DNSBL domain listed in the
	ZyWALL.
	dnsbl-timeoutconfigures 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.
	Use up to 15 alphanumeric characters, underscores (_), colons (:), or
	dashes (-).
show anti-spam dnsbl status	Displays the activation status of the anti-spam DNSBL checking.
show anti-spam dnsbl domain	Displays the ZyWALL’s configured anti-spam DNSBL domain entries.
show anti-spam dnsbl max-query-ip	Displays how many sender and relay server IP addresses in the mail
	header anti-spam checks against the DNSBL.
show anti-spam dnsbl ip-check-order	Displays the order in which anti-spam checks e-mail header IP addresses
	against the DNSBLs.
show anti-spam dnsbl query-timeout {smtp	Displays how the ZyWALL handles SMTP or POP3 mail if the queries to the
pop3}	DNSBL domains time out.
show anti-spam tag {dnsbl dnsbl-	dnsbl displays the anti-spam tag for e-mails that have a sender or relay
timeout}	IP address in the header that matches a blacklist maintained by a DNSBL
	domain.
	dnsbl-timeoutdisplays 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	Sets how long the ZyWALL waits for a reply from the DNSBL domains.
[1..10]
show anti-spam dnsbl query-timeout time	Displays how long the ZyWALL waits for a reply from the DNSBL domains.

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ZyWALL (ZLD) CLI Reference Guide