Wellink Corporation NEOBIT1014VA ユーザーズマニュアル

 

 

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Configuring DNS Server Addresses 

Domain Name System (DNS) servers map the user-friendly domain 
names that users type into their Web browsers (e.g., "yahoo.com") 
to the equivalent numerical IP addresses that are used for Internet 
routing. 

When a PC user types a domain name into a browser, the PC must 
first send a request to a DNS server to obtain the equivalent IP 
address. The DNS server will attempt to look up the domain name 
in its own database, and will communicate with higher-level DNS 
servers when the name cannot be found locally. When the address 
is found, it is sent back to the requesting PC and is referenced in IP 
packets for the remainder of the communication. 

Multiple DNS addresses are useful to provide alternatives when one 
of the servers is down or is encountering heavy traffic. ISPs typically 
provide primary and secondary DNS addresses, and may provide 
additional addresses. Your LAN PCs learn these DNS addresses in 
one of the following ways: 

 Statically: If your ISP provides you with their DNS server 

addresses, you can assign them to each PC by modifying 
the PCs' IP properties. 

 Dynamically from a DHCP pool: You can configure the 

DHCP Server feature on the ADSL Router and create an 
address pool that specify the DNS addresses to be 
distributed to the PCs. Refer to Chapter 7, “Configuring 
DHCP Server” on page 53 for instructions on creating 
DHCP address pools. 

In either case, you can specify the actual addresses of the ISP's 
DNS servers (on the PC or in the DHCP pool), or you can specify 
the address of the LAN port on the ADSL Router (e.g., 
192.168.1.1). When you specify the LAN port IP address, the 
device performs DNS relay, as described in the following section. 

 

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