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Prestige 782R G.SHDSL Router
3-2 Internet Access
3.2.3 DNS Server Address
DNS (Domain Name System) is for mapping a domain name to its corresponding IP address and vice versa,
e.g., the IP address of www.zyxel.com is 204.217.0.2. The DNS server is extremely important because
without it, a user must know the IP address of a computer before can accessing it.
Your ISP may assign you DNS server addresses in an information sheet when you sign up. If so, type them
into the DNS Server fields in DHCP Setup. If you leave this server field set to 0.0.0.0, the Prestige will act
as a DNS proxy.
Some ISP’s choose to bypass the DNS servers using the DNS server extensions of PPP IPCP (IP Control
Protocol) after connection. If your ISP did not give you explicit DNS servers, chances are the DNS servers
are conveyed through IPCP negotiation. The Prestige supports the IPCP DNS server extensions through the
DNS proxy feature.
If the Primary and Secondary DNS Server fields in DHCP Setup are left as 0.0.0.0, the Prestige tells the
DHCP clients that the Prestige is the DNS server. When a computer sends a DNS query to the Prestige, the
Prestige forwards the query to the real DNS server learned through IPCP and relays the response back to the
computer.
Please note that DNS proxy works only when the ISP uses the IPCP DNS server extensions. It does not
mean you can leave the DNS servers out of the DHCP setup under all circumstances. If your ISP gives you
explicit DNS servers, make sure that you type their IP addresses in the DHCP Setup menu. This way, the
Prestige can pass the DNS servers to the computers and the computers can query the DNS server directly
without the Prestige’s intervention.
Example of Network Properties for LAN Servers with Fixed IP#
Choose an IP: 192.168.1.2 to 192.168.1.32; 192.168.1.65 to 192.168.1.254.
Netmask: 255.255.255.0
Gateway (or default route): 192.168.1.1 (Prestige LAN IP)
3.2.4 TCP/IP and DHCP Ethernet Setup: TCP/IP
You will now use Menu 3.2 to configure your Prestige for TCP/IP.
3.2.5 IP Address and Subnet Mask
Just as apartments in the same building share a common street address, the computers on a LAN share one
common network number.
Where you obtain your network number depends on your particular circumstances. If the ISP or your
network administrator assigns you a block of registered IP addresses, follow the instructions in selecting the
IP addresses and the subnet mask.