ZyXEL P-336M User Guide - Page 25

WAN Overview

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ZyXEL P-336M User's Guide 3.2 WAN Overview The P-336M offers three Internet access modes: Static IP, Dynamic IP and PPPoE. To configure advanced Internet access settings, click Basic > WAN to display the configuration screen. This screen varies depending on the Internet access mode you select. 3.2.1 WAN IP Address Assignment Every computer on the Internet must have a unique IP address. If your networks are isolated from the Internet, for instance, only between your two branch offices, you can assign any IP addresses to the hosts without problems. However, the Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of IP addresses specifically for private networks. Table 5 Private IP Address Ranges 10.0.0.0 172.16.0.0 192.168.0.0 - 10.255.255.255 - 172.31.255.255 - 192.168.255.255 You can obtain your IP address from the IANA, from an ISP or have it assigned by a private network. If you belong to a small organization and your Internet access is through an ISP, the ISP can provide you with the Internet addresses for your local networks. On the other hand, if you are part of a much larger organization, you should consult your network administrator for the appropriate IP addresses. Note: Regardless of your particular situation, do not create an arbitrary IP address; always follow the guidelines above. For more information on address assignment, please refer to RFC 1597, Address Allocation for Private Internets and RFC 1466, Guidelines for Management of IP Address Space. 3.2.2 DNS Server Address Assignment Use DNS (Domain Name System) to map a domain name to its corresponding IP address and vice versa, for instance, the IP address of www.zyxel.com is 204.217.0.2. The DNS server is extremely important because without it, you must know the IP address of a computer before you can access it. The P-336M can get the DNS server addresses in the following ways. 1 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, manually enter them in the DNS server fields. 2 If your ISP dynamically assigns the DNS server IP addresses (along with the P-336M's WAN IP address), set the DNS server fields to get the DNS server address from the ISP. 25 Chapter 3 Basic

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ZyXEL P-336M User’s Guide
25
Chapter 3 Basic
3.2
WAN Overview
The P-336M offers three Internet access modes:
Static IP
,
Dynamic IP
and
PPPoE
. To
configure advanced Internet access settings, click
Basic > WAN
to display the configuration
screen. This screen varies depending on the Internet access mode you select.
3.2.1
WAN IP Address Assignment
Every computer on the Internet must have a unique IP address. If your networks are isolated
from the Internet, for instance, only between your two branch offices, you can assign any IP
addresses to the hosts without problems. However, the Internet Assigned Numbers Authority
(IANA) has reserved the following three blocks of IP addresses specifically for private
networks.
You can obtain your IP address from the IANA, from an ISP or have it assigned by a private
network. If you belong to a small organization and your Internet access is through an ISP, the
ISP can provide you with the Internet addresses for your local networks. On the other hand, if
you are part of a much larger organization, you should consult your network administrator for
the appropriate IP addresses.
Note:
Regardless of your particular situation, do not create an arbitrary IP address;
always follow the guidelines above. For more information on address
assignment, please refer to RFC 1597, Address Allocation for Private Internets
and RFC 1466, Guidelines for Management of IP Address Space.
3.2.2
DNS Server Address Assignment
Use DNS (Domain Name System) to map a domain name to its corresponding IP address and
vice versa, for instance, the IP address of www.zyxel.com is 204.217.0.2. The DNS server is
extremely important because without it, you must know the IP address of a computer before
you can access it.
The P-336M can get the DNS server addresses in the following ways.
1
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, manually enter them in
the DNS server fields.
2
If your ISP dynamically assigns the DNS server IP addresses (along with the P-336M’s
WAN IP address), set the DNS server fields to get the DNS server address from the ISP.
Table 5
Private IP Address Ranges
10.0.0.0
-
10.255.255.255
172.16.0.0
-
172.31.255.255
192.168.0.0
-
192.168.255.255