Dns Overview; Dns Server Address Assignment; Configuring The Dns Screen - ZyXEL Communications UAG4100 User Manual

40.6 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.

40.6.1 DNS Server Address Assignment

The UAG can get the DNS server addresses in the following ways.
• 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.
• If your ISP dynamically assigns the DNS server IP addresses (along with the UAG's WAN IP
address), set the DNS server fields to get the DNS server address from the ISP.
• You can manually enter the IP addresses of other DNS servers.

40.6.2 Configuring the DNS Screen

Click Configuration > System > DNS to change your UAG's DNS settings. Use the DNS screen to
configure the UAG to use a DNS server to resolve domain names for UAG system features like
DDNS and the time server. You can also configure the UAG to accept or discard DNS queries. Use
the Network > Interface screens to configure the DNS server information that the UAG sends to
the specified DHCP client devices.
Figure 246 Configuration > System > DNS
Chapter 40 System
UAG4100 User's Guide
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