ZyXEL Communications Prestige 623ME-T, User Manual

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Prestige 623ME-T User’s Guide
NAT 17-1
Chapter 17
Network Address Translation (NAT)
This chapter discusses how to configure NAT on the Prestige.
17.1 NAT Overview
NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP address of a host in a
packet, for example, the source address of an outgoing packet, used within one network to a different IP
address known within another network.
17.2 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. .
Figure 17-1 Menu 4 Applying NAT for Internet Access
Step 1. Enter 4 from the main menu..
Step 2.
Move the cursor to the Network Address Translation field, press
[SPACE BAR]
to select
SUA Only.
Step 3. Press [ENTER] to save your settings back to the Prestige.
Menu 4 - Internet Access Setup
ISP's Name= MyISP
Encapsulation= PPPoE
Multiplexing= LLC-based
VPI #= 1
VCI #= 32
ATM QoS Type= CBR
Peak Cell Rate (PCR)= 0
Sustain Cell Rate (SCR)= 0
Maximum Burst Size (MBS)= 0
My Login= 1234
My Password= ********
Idle Timeout (sec)= 0
IP Address Assignment= Dynamic
IP Address= N/A
Network Address Translation= SUA Only
Address Mapping Set= N/A
Press ENTER to Confirm or ESC to Cancel: Press Space Bar to Toggle.