Static Napt - Dynamix UM-A User Manual

A.2 Static NAPT
NAPT, also known as NAT-PAT, stands for Network Address Translation and Port Address
Translation. An extension of Basic NAT, NAPT enables outbound sessions so that the hosts in a private
network to access the external network.
Facts of NAPT:
NAPT multiplexes traffic from the internal network and presents it to the Internet as if it is
coming from only one IP address.
Translation in NAPT is extended to include IP address and Transport identifier such as
TCP/UDP port or ICMP query ID.
NAPT maps multiple IP addresses and their TCP/UDP ports in the private domain to a single
IP address and its TCP/UDP ports in the public domain. This is known as a multiple-mapping
mechanism. For each WAN Interface, more than one local PC can be associated with one
WAN Interface.
NAPT allows multiple nodes in a local network to simultaneously access remote networks
using the single IP address assigned to their router.
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