Alcatel AST570, User Manual

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NAPT
In this chapter
16 Security Services - NAT & PAT
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3EC 17766 AAAA TCZZA Ed. 04
16 Security Services - NAT & PAT
Network Address Translation (NAT) is a technique that allows you
to shield or decouple an internal (Private) IP address from the
(negotiated) external (Public) IP address.
In addition, via Port Translation (PT), this single external Public IP
address is mapped onto multiple internal ports on the (W)LAN,
thus allowing multiple users to share this external IP address
simultaneously.
The amalgam of address & port allocation is often referred to as
Network Address and Port Translation (NA(P)T).
Note : NA(P)T is described in RFC3022 which obsoletes RFC1631 The IP
Network Translator (NAT)".
Topic See
AST570 and NA(P)T 16.1
Packet Services and NA(P)T 16.2
The AST570 'NAT' Page 16.3
NA(P)T Configuration Example 16.3