Chapter 43 System

43.5.2 Configuring the DNS Screen

Click System > DNS to change your ZyWALL’s DNS settings. Use the DNS screen to configure the ZyWALL to use a DNS server to resolve domain names for ZyWALL system features like VPN, DDNS and the time server. You can also configure the ZyWALL to accept or discard DNS queries. Use the Network > Interface screens to configure the DNS server information that the ZyWALL sends to the specified DHCP client devices.

Figure 490 System > DNS

The following table describes the labels in this screen.

Table 233 System > DNS

LABEL

DESCRIPTION

Address/PTR

This record specifies the mapping of a fully qualified domain name (FQDN) to an IP

Record

address. An FQDN consists of a host and domain name. For example,

 

www.zyxel.com.tw is a fully qualified domain name, where “www” is the host,

 

“zyxel” is the third-level domain, “com” is the second-level domain, and “tw” is the

 

top level domain.

 

 

#

This is the index number of the address/PTR record.

 

 

FQDN

This is a host’s fully qualified domain name.

 

 

IP Address

This is the IP address of a host.

 

 

Add icon

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

 

address/PTR record. Refer to Table 234 on page 674 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.

 

 

Domain Zone

This specifies a DNS server’s IP address. The ZyWALL can query the DNS server

Forwarder

to resolve domain zones for features like VPN, DDNS and the time server.

 

When the ZyWALL needs to resolve a domain zone, it checks it against the domain

 

zone forwarder entries in the order that they appear in this list.

 

 

#

This is the index number of the domain zone forwarder record. The ordering of your

 

rules is important as rules are applied in sequence.

 

A hyphen (-) displays for the default domain zone forwarder record. The default

 

record is not configurable. The ZyWALL uses this default record if the domain zone

 

that needs to be resolved does not match any of the other domain zone forwarder

 

records.

 

 

 

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ZyWALL USG 100/200 Series User’s Guide