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LTE TDD B2268H
User Guide
8 Network Address Translation (NAT)
Issue 01 (2014-01-15)
Copyright © Huawei Technologies Co., Ltd.
73
(local) IP addresses to globally unique ones required for communication with hosts on other
networks. It replaces the original IP source address (and TCP or UDP source port numbers for
Many-to-One and Many-to-Many Overload NAT mapping) in each packet and then forwards it
to the Internet. The LTE Device keeps track of the original addresses and port numbers so
incoming reply packets can have their original values restored. The following figure illustrates
this.
Figure 8-6
How NAT Works