5.8.5 New Port Mapping
Port mapping is to map a port of a host on the intranet to a port of a host on the
extranet to provide corresponding services. When a user accesses the port on the
extranet, the server automatically maps the request to the internal machine on the
corresponding LAN.
Scenario: Users on the extranet cannot directly access a web server on the
intranet. In this case, a port mapping can be created on the gateway so that the
gateway automatically transfers the data to port 80 of the web server on the
intranet when a user on the extranet accesses port 1000 via the cellular interface
of the gateway.
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