ZyXEL Communications ZyWALL 300 User Manual

Chapter 43 System

ZyWALL USG 300 User’s Guide

DNS Server

This is the IP address of a DNS server. This field displays N/A if you have the 
ZyWALL get a DNS server IP address from the ISP dynamically but the specified 
interface is not active.

Add icon

Click the Add icon in the heading row to open a screen where you can add a new 
domain zone forwarder record. Refer to 

for information on 

the fields.
Click the Edit icon to go to the screen where you can edit the record.
Click the Add icon in an entry to add a record below the current entry.
Click the Delete icon to remove an existing record. A window display asking you to 
confirm that you want to delete the record. Note that subsequent records move up 
by one when you take this action.
Click the Move to N icon to display a field to type a number for where you want to 
put that record and press [ENTER] to move the record to the number that you 
typed.

MX Record (for 
My FQDN)

A MX (Mail eXchange) record identifies a mail server that handles the mail for a 
particular domain.

#

This is the index number of the MX record.

Domain Name

This is the domain name where the mail is destined for.

IP/FQDN

This is the IP address or fully qualified domain name of a mail server that handles 
the mail for the domain specified in the field above.

Add icon

Click the Add icon in the heading row to open a screen where you can add a new 
MX record. Refer to 

 

for information on the fields.

Click the Edit icon to go to the screen where you can edit the record.
Click the Delete icon to remove an existing record. A window display asking you to 
confirm that you want to delete the record. Note that subsequent records move up 
by one when you take this action.

Service Control

This specifies from which computers and zones you can send DNS queries to the 
ZyWALL.

#

This the index number of the service control rule. The ordering of your rules is 
important as rules are applied in sequence.

Zone

This is the zone on the ZyWALL the user is allowed or denied to access.

Address

This is the object name of the IP address(es) with which the computer is allowed or 
denied to send DNS queries.

Action

This displays whether the ZyWALL accepts DNS queries from the computer with 
the IP address specified above through the specified zone (Accept) or discards 
them (Deny).

Add icon

Click the Add icon in the heading row to open a screen where you can add a new 
rule. Refer to 

 for information on the fields.

Click the Edit icon to go to the screen where you can edit the rule.
Click the Add icon in an entry to add a rule below the current entry.
Click the Delete icon to remove an existing rule. A window display asking you to 
confirm that you want to delete the rule. Note that subsequent rules move up by one 
when you take this action.
Click the Move to N icon to display a field to type a number for where you want to 
put that rule and press [ENTER] to move the rule to the number that you typed.

Table 200   System > DNS (continued)