LT-4200 User & Installation Manual Rev. 1.00
System Services
Lars Thrane A/S
www.thrane.eu
Page 56 of 128
PPPoE
Point-to-Point Protocol over Ethernet (PPPoE) is a link layer network protocol used to facilitate direct
communication between two network points. When PPPoE is used in an existing Ethernet/IP network, the
PPPoE protocol creates an additional isolated IP network in parallel to the existing Ethernet/IP network.
This logical separation of the two IP networks allows the LT-4200 to offer different properties and services
on each network and thus also to the clients connected to the respective network. Something similar can
be achieved with VLAN, but PPPoE has the additional advantages of being connection oriented and having
built-in authentication.
Also important is that operating systems like Microsoft Windows can be easily configured
not
to send any
data over the PPPoE network, except to/from applications explicitly configured to use the PPPoE network.
Because PPPoE is connection oriented, the user can manually Connect/Disconnect from the PPPoE network
an thus control data usage directly from the PC. Some applications can even Connect/Disconnect
automatically making the use of PPPoE completely transparent.
NOTE:
The IP data manual start/stop does
not
affect the PPPoE connection(s). To stop data
flowing on a PPPoE connection, the PPPoE connection must be disconnected.
When configuring PPPoE in the LT-4200, it is optional whether the network traffic shall be routed through
the firewall. Avoiding the firewall can be useful in case of trusted applications (e.g. weather or email) or for
complete network devices trusted not to misuse the satellite link. The later can be e.g IoT devices or an
advanced network router, which can automatically route traffic between the LT-4200 and e.g. a VSAT
system, depending on availability of the VSAT service.
IMPORTANT:
Do not configure the PC to use the PPPoE interface as the default route and simultaneously
disable use of firewall
NOTE:
The LT-4200 PPPoE uses CHAP for authentication. The Authentication phase is encrypted,
but not for the IP data.
NOTE:
PPPoE is per default disabled and must be activated for use.
Summary of Contents for Iridium Certus 200
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