Chapter 25 Network Address Translation (Nat); Using Nat - Nortel Contivity 221 User Manual

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Network Address Translation (NAT)

You must create a firewall rule in addition to setting up SUA/NAT, to allow traffic

from the WAN to be forwarded through the Contivity 221.

SUA (Single User Account) Versus NAT

SUA (Single User Account) is an implementation of a subset of NAT that supports two types of

mapping, Many-to-One and Server. See section 25.2.1 for a detailed description of the NAT set

for SUA. The Contivity 221 also supports Full Feature NAT to map multiple global IP

addresses to multiple private LAN IP addresses of clients or servers using mapping types as

outlined in the WebGUI User's Guide.

1. Choose SUA Only if you have just one public WAN IP address for your Contivity 221.

2. Choose Full Feature if you have multiple public WAN IP addresses for your Contivity

Applying NAT

You apply NAT via menus 4 or 11.3 as displayed next. The next figure shows you how to apply

NAT for Internet access in menu 4. Enter 4 from the main menu to go to Menu 4 - Internet

Access Setup.

This chapter discusses how to configure NAT on the Contivity 221.

Contivity 221 VPN Switch User's Guide