Dns Overview; Domain Zone Forwarder; Dns Commands - ZyXEL Communications UAG Series Cli Reference Manual

32.6 DNS Overview

DNS (Domain Name System) is for mapping a domain name to its corresponding IP address and
vice versa. The DNS server is extremely important because without it, you must know the IP
address of a machine before you can access it.

32.6.1 Domain Zone Forwarder

A domain zone forwarder contains a DNS server's IP address. The UAG can query the DNS server to
resolve domain zones for features like VPN, DDNS and the time server. A domain zone is a fully
qualified domain name without the host. For example, zyxel.com.tw is the domain zone for the
www.zyxel.com.tw fully qualified domain name.

32.6.2 DNS Commands

The following table identifies the values required for many of these commands. Other input values
are discussed with the corresponding commands.
Table 116 Input Values for General DNS Commands
LABEL
address_object
interface_name
The following table describes the commands available for DNS. You must use the
command to enter the configuration mode before you can use these commands.
terminal
Table 117 Command Summary: DNS
COMMAND
[no] ip dns server a-record fqdn w.x.y.z
ip dns server -flush
[no] ip dns server mx-record domain_name
{w.x.y.z|fqdn}
ip dns server rule {<1..32>|append|insert
<1..32>} access-group {ALL|address_object}
zone {ALL|address_object} action {accept|deny}
ip dns server rule move <1..32> to <1..32>
UAG CLI Reference Guide
DESCRIPTION
The name of the IP address (group) object. You may use 1-31 alphanumeric characters,
underscores( ), or dashes (-), but the first character cannot be a number. This value is
_
case-sensitive.
The name of the interface. This depends on the UAG model.
See Table 13 on page 55 for detailed information about the interface name.
DESCRIPTION
Sets an A record that specifies the mapping of a fully qualified
domain name (FQDN) to an IP address. The
an A record.
Clears the DNS .
Sets a MX record that specifies a mail server that is responsible for
handling the mail for a particular domain. The
deletes a MX record.
Sets a service control rule for DNS requests.
Changes the number of a service control rule.
Chapter 32 System
configure
command deletes
no
command
no
205