Port Mapping; Vlan Tagging; Ipgw Vlan Tagging - Hughes HX System System Overview

IPGW VLAN tagging The IPGW VLAN Tagging feature allows an operator to define
Chapter 6 • IP features
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The capability for NAT and PAT is assigned to satellite routers in
their profiles, assigned to them at the HX gateway.
The following NAT/PAT modes are supported:
• Port Address Translation (PAT) allows users to send data
• Simple NAT enables enterprise customers to cut over to the

Port mapping

If a satellite router is configured for port address translation, it
can also be configured for port mapping. Port mapping (or port
forwarding) is the mapping of traffic received by the satellite
router on a given port to a particular IP address/port number on
the satellite router LAN. Mappings can be specified as either TCP
or UDP. Port mapping can be configured in a remote profile at the
HX gateway, or optionally in a Port Mapping configuration page
on the satellite router's System Control Center interface. For
more information, refer to the User Manual for the type of
satellite router you are using.

VLAN Tagging

VLAN Tagging is comprised of three features:

• IPGW VLAN tagging

• Remote VLAN tagging
• End to End VLAN tagging
multiple logical IPGW instances on a single IPGW server. Each
of these instances is associated with a unique VLAN ID on its
enterprise VLAN, which is permanently tied to the VLAN
instance. Therefore, any packet traversing from a satellite modem
defined on that IPGW instance will always be tagged with the
respective enterprise VLAN id.
traffic from multiple IP devices on the satellite router LAN
using a single address.
network without changing their existing networks. By using
static translation tables, it also makes servers on the satellite
router LAN accessible from the WAN side. Simple NAT
provides two methods for configuring the translation tables:
– Auto-Map: The mapping from satellite router LAN
addresses to NAT addresses can be auto-generated, based
on the address ranges configured.
– Manual-Map: The mapping table entries can be specified
individually. This is especially useful if the satellite router
LAN has sparsely addressed IP devices, such as when the
satellite router LAN subnet size exceeds the NAT subnet
size.