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Chapter 7 LAN Setup
P-660HN-F1A User’s Guide
138
7.6.2 DHCP Setup
DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows
individual clients to obtain TCP/IP configuration at start-up from a server. You can
configure the P-660HN-F1A as a DHCP server or disable it. When configured as a
server, the P-660HN-F1A provides the TCP/IP configuration for the clients. If you
turn DHCP service off, you must have another DHCP server on your LAN, or else
the computer must be manually configured.
IP Pool Setup
The P-660HN-F1A is pre-configured with a pool of IP addresses for the DHCP
clients (DHCP Pool). See the product specifications in the appendices. Do not
assign static IP addresses from the DHCP pool to your LAN computers.
7.6.3 DNS Server Addresses
DNS (Domain Name System) maps 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. The DNS
server addresses you enter when you set up DHCP 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 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 DHCP Setup screen.
• Some ISPs choose to disseminate the DNS server addresses using the DNS
server extensions of 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 P-660HN-F1A supports the IPCP DNS
server extensions through the DNS proxy feature.
If the DNS Server fields in the DHCP Setup screen are set to DNS Relay, the
P-660HN-F1A tells the DHCP clients that it itself is the DNS server. When a
computer sends a DNS query to the P-660HN-F1A, the P-660HN-F1A acts as a
DNS proxy and 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 DHCP Setup screen.
Summary of Contents for P-660HN-F1A
Page 2: ......
Page 10: ...Contents Overview P 660HN F1A User s Guide 10...
Page 20: ...Table of Contents P 660HN F1A User s Guide 20...
Page 21: ...21 PART I User s Guide...
Page 22: ...22...
Page 36: ...Chapter 2 Introducing the Web Configurator P 660HN F1A User s Guide 36...
Page 44: ...Chapter 3 Status Screens P 660HN F1A User s Guide 44...
Page 84: ...Chapter 4 Tutorials P 660HN F1A User s Guide 84 Physical Port 1 3 exclude port 4 3 Click Apply...
Page 88: ...Chapter 4 Tutorials P 660HN F1A User s Guide 88...
Page 103: ...103 PART II Technical Reference...
Page 104: ...104...
Page 142: ...Chapter 7 LAN Setup P 660HN F1A User s Guide 142...
Page 188: ...Chapter 9 Network Address Translation NAT P 660HN F1A User s Guide 188...
Page 210: ...Chapter 10 Firewalls P 660HN F1A User s Guide 210...
Page 236: ...Chapter 13 Certificates P 660HN F1A User s Guide 236...
Page 240: ...Chapter 14 Static Route P 660HN F1A User s Guide 240...
Page 276: ...Chapter 17 Dynamic DNS Setup P 660HN F1A User s Guide 276...
Page 288: ...Chapter 18 Remote Management P 660HN F1A User s Guide 288...
Page 344: ...Chapter 24 Troubleshooting P 660HN F1A User s Guide 344...
Page 376: ...Appendix A Setting up Your Computer s IP Address P 660HN F1A User s Guide 376...
Page 386: ...Appendix B Pop up Windows JavaScripts and Java Permissions P 660HN F1A User s Guide 386...
Page 396: ...Appendix C IP Addresses and Subnetting P 660HN F1A User s Guide 396...
Page 420: ...Appendix F Legal Information P 660HN F1A User s Guide 420...
Page 430: ...Index P 660HN F1A User s Guide 430...