P-660R-T Series User’s Guide
59
Chapter 5 LAN Setup
5.2 DNS Server Address
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 DNS server addresses that you enter in
the DHCP setup are passed to the client machines along with the assigned IP address and
subnet mask.
There are two ways that an ISP disseminates the DNS server addresses. The first is for an ISP
to tell a customer the DNS server addresses, usually in the form of an information sheet, when
s/he signs up. If your ISP gives you the DNS server addresses, enter them in the
DNS Server
fields in the
LAN Setup
screen, otherwise, leave them blank.
Some ISP’s choose to pass the DNS servers using the DNS server extensions of PPP IPCP (IP
Control Protocol) after the connection is up. 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 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 the
LAN Setup
screen.
• The Prestige acts as a DNS proxy when the
Primary
and
Secondary
DNS Server
fields
are left blank in the
LAN Setup
screen.
Содержание ADSL2+ 4-port Gateway P-660H-D Series
Страница 1: ...P 660R T Series ADSL2 Ethernet Gateway User s Guide Version 3 40 6 2005 ...
Страница 23: ...P 660R T Series User s Guide 23 ...
Страница 27: ...P 660R T Series User s Guide 27 ...
Страница 31: ...P 660R T Series User s Guide 31 Introduction to DSL ...
Страница 39: ...P 660R T Series User s Guide 39 Chapter 1 Getting To Know Your Prestige ...
Страница 57: ...P 660R T Series User s Guide 57 Chapter 4 Password Setup ...
Страница 65: ...P 660R T Series User s Guide 65 Chapter 5 LAN Setup ...
Страница 75: ...P 660R T Series User s Guide 75 Chapter 6 WAN Setup ...
Страница 87: ...P 660R T Series User s Guide 87 Chapter 7 Network Address Translation NAT Screens ...
Страница 95: ...P 660R T Series User s Guide 95 Chapter 10 Remote Management Configuration ...
Страница 107: ...P 660R T Series User s Guide 107 Chapter 11 Universal Plug and Play UPnP ...
Страница 127: ...P 660R T Series User s Guide 127 Chapter 14 Menu 1 General Setup ...
Страница 131: ...P 660R T Series User s Guide 131 Chapter 15 Menu 2 WAN Backup Setup ...
Страница 135: ...P 660R T Series User s Guide 135 Chapter 16 Menu 3 LAN Setup ...
Страница 157: ...P 660R T Series User s Guide 157 Chapter 19 Static Route Setup ...
Страница 161: ...P 660R T Series User s Guide 161 Chapter 20 Bridging Setup ...
Страница 177: ...P 660R T Series User s Guide 177 Chapter 21 Network Address Translation NAT ...
Страница 205: ...P 660R T Series User s Guide 205 Chapter 24 System Information and Diagnosis ...
Страница 217: ...P 660R T Series User s Guide 217 Chapter 25 Firmware and Configuration File Maintenance ...
Страница 223: ...P 660R T Series User s Guide 223 Chapter 26 System Maintenance ...
Страница 227: ...P 660R T Series User s Guide 227 Chapter 27 Remote Management ...
Страница 237: ...P 660R T Series User s Guide 237 Chapter 28 IP Policy Routing ...
Страница 241: ...P 660R T Series User s Guide 241 Chapter 29 Call Scheduling ...
Страница 253: ...P 660R T Series User s Guide 253 Chapter 30 Troubleshooting Figure 173 Java Sun ...
Страница 257: ...P 660R T Series User s Guide 257 Appendix A ...
Страница 281: ...P 660R T Series User s Guide 281 Appendix C IP Subnetting ...
Страница 284: ...P 660R T Series User s Guide Appendix D Splitters and Microfilters 284 ...
Страница 285: ...P 660R T Series User s Guide 285 Appendix D Splitters and Microfilters ...
Страница 287: ...P 660R T Series User s Guide 287 Appendix E Command Interpreter ...
Страница 295: ...P 660R T Series User s Guide 295 Virtual Circuit Topology ...