ZyXEL Communications Prestige 662HW Series, User Manual

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Prestige 662HW Series User’s Guide
5-2 LAN Setup
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 the LAN Setup screen are not specified, for
instance, left as 0.0.0.0, the Prestige tells the DHCP clients that it itself 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 enter their IP addresses in the
LAN Setup screen.
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.
5.3 DNS Server Address Assignment
Use DNS (Domain Name System) to map 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
computer before you can access it.
There are two ways that an ISP disseminates the DNS server addresses.
♦
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, enter them in the DNS Server fields
in DHCP Setup.
♦
The Prestige acts as a DNS proxy when the Primary and Secondary DNS Server fields are
left blank in the LAN Setup screen.
5.4 LAN TCP/IP
The Prestige has built-in DHCP server capability that assigns IP addresses and DNS servers to systems
that support DHCP client capability.
5.4.1 Factory LAN Defaults
The LAN parameters of the Prestige are preset in the factory with the following values:
♦ IP address of 192.168.1.1 with subnet mask of 255.255.255.0 (24 bits)
♦ DHCP server enabled with 32 client IP addresses starting from 192.168.1.33.
These parameters should work for the majority of installations. If your ISP gives you explicit DNS
server address(es), read the embedded web configurator help regarding what fields need to be
configured.
5.4.2 IP Address and Subnet Mask
Refer to the IP Address and Subnet Mask section in the Wizard Setup chapter for this information.
5.4.3 RIP Setup
RIP (Routing Information Protocol) allows a router to exchange routing information with other
routers. The
RIP Direction field controls the sending and receiving of RIP packets. When set to: