Hughes BGAN 9201, Руководство пользователя

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BGAN Terminal User's Guide
73
If multiple users are connected to a router with DHCP and a NAT
(e.g. a Linksys) that is connected to the MT, all the users appear as a
single user and share a single PDP context. This gives users flexibility in
case charges are by IP address/PDP context.
Secondary Context
Secondary contexts can be set-up from the MMI, and are
associated with a primary context. Secondary contexts might be
used, for example, when multiple applications on one TE are started,
and the TE’s primary context has already been set-up.
Each secondary contexts requires a Traffic Flow Template to be
configured, which defines how the data for the secondary context
should be routed. This is done through the MMI.
IP A
DDRESSING
Connections between each TE and the terminal are achieved with
private IP addresses, and between the terminal and the BGAN
network with global addresses.
Private addresses can be dynamically assigned by the DHCP server
in the terminal, starting from192.168.128.100. They can also be
statically configured from the TE (via the MMI), in which case
addresses in the range 192.168.128.2 through 192.168.128.100 should
be used.
The global address of the terminal is assigned by the Network
Service Provider, and can be either static or dynamic. Dynamic
global address configuration is automatically carried out by the
mechanism in the terminal that activates contexts. Static global
address configuration is carried out by the user via the MMI on the
TE, by entering a static address provided by the Network Service
Provider.
F
IREWALL AND
DMZ H
OST
The terminal will operate as a firewall and block all IP connections
that are initiated from the BGAN network or internet. However, it can
be configured to forward network initiated connections to one or
more local TEs, eg. for FTP or HTTP data transfers. This is called “DMZ
host”, and is configured on the MMI.