Chapter 9: Nat; Port Forwarding - Edimax BR-6479Gn Quick Installation Manual

Chapter 9: NAT

NAT (Network Address Translations) solves the problem of sharing a single IP address to
multiple computers. Without NAT, all computers must be assigned with a valid Internet IP
address to get connected to Internet, but Internet service providers only provide very few IP
addresses to every user. Therefore it's necessary to use NAT technology to share a single
Internet IP address to multiple computers on local network, so everyone can get connected to
Internet.
BR-6479Gn supports four types of NAT functions, and the instructions of these functions will be
given below.
NAT (Network Address Translation) is a way to map an entire network (or networks) to a single
IP address. It is necessary especially when the number of IP addresses assigned by your ISP is
less than the total numbers that you wish to provide for Internet access.
As for Fast NAT. it is a fast translation function, but has to go with other network devices'
functions, such as session control. Fast NAT is seldom used at home or in offices, so the default
setting is "Disable"

9-1 Port Forwarding

If your networking devices can run protocols, such as http, ftp, for external communications,
enable "Port Forwarding" can help you to keep them open to Internet access.
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