Dns; Chapter 14 Dns; Dns Overview; Dns Server Address Assignment - ZyXEL Communications NBG410W3G User Manual

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This chapter shows you how to configure the DNS screens.

14.1 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. The ZyXEL Device uses a system DNS
server (in the order you specify in the DNS System screen) to resolve domain names, for
example, DDNS and the time server.

14.2 DNS Server Address Assignment

The ZyXEL Device can get the DNS server addresses in the following ways.
1 The ISP tells you the DNS server addresses, usually in the form of an information sheet,
when you sign up. If your ISP gives you DNS server addresses, manually enter them in
the DNS server fields.
2 If your ISP dynamically assigns the DNS server IP addresses (along with the ZyXEL
Device's WAN IP address), set the DNS server fields to get the DNS server address from
the ISP.
3 You can manually enter the IP addresses of other DNS servers. These servers can be
public or private. A DNS server could even be behind a remote IPSec router (see
14.5.1 on page

14.3 DNS Servers

There are three places where you can configure DNS setup on the ZyXEL Device.
1 Use the DNS System screen to configure the ZyXEL Device to use a DNS server to
resolve domain names for ZyXEL Device system features such as DDNS and the time
server.
2 Use the DNS DHCP screen to configure the DNS server information that the ZyXEL
Device sends to the DHCP client devices on the LAN or DMZ.
3 Use the REMOTE MGMT DNS screen to configure the ZyXEL Device to accept or
discard DNS queries.
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DNS

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