Reference Guide for the Model RT328 and Model RH348 ISDN Routers
Regardless of your particular situation, do not create an arbitrary IP address; always follow the guidelines explained here. For more information about address assignment, refer to RFC 1597,
Address Allocation for Private Internets, | and RFC 1466, Guidelines for Management of IP | |
Address Space | . |
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Single IP Address Operation Using NAT
If multiple stations on a LAN need to access the Internet simultaneously, they usually have to obtain a range of IP addresses from the ISP. This type of Internet account is much more costly than a
allows an entire department of networked PCs to share an Internet account using only a single IP address, which may be statically or dynamically assigned by your Internet service provider (ISP).
The router accomplishes this address sharing by translating the internal LAN IP addresses to a single address that is globally unique on the Internet. The internal LAN IP addresses can be either private addresses or registered addresses. For more information about IP address translation, refer
to RFC 1631, The IP Network Address Translator (NAT) | . |
Figure
Private IP addresses assigned by user
IP addresses assigned by ISP
192.168.0.2
192.168.0.3
192.168.0.1172.21.15.105
Internet
192.168.0.4
192.168.0.5
7786EA
Figure
Introduction |