Chapter 4 Wan; Wan Overview; Wan Ip Address Assignment; Table 12 Private Ip Address Ranges - ZyXEL Communications ZyXEL NBG-415N User Manual

This chapter introduces shows you how to configure the WAN using the advanced
configuration screen for Internet access.

4.1 WAN Overview

You can use the advanced WAN configuration screen to configure the WAN port for Internet
access. Select the Internet access mode (Static IP, Dynamic IP, PPPoE, PPTP and L2TP)
your ISP uses on the ZyXEL Device.

4.1.1 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 12 Private IP Address Ranges

10.0.0.0
172.16.0.0
192.168.0.0
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.

Chapter 4 WAN

- 10.255.255.255
- 172.31.255.255
- 192.168.255.255
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