Function Overview - T-TeleSec LineCrypt DSL User Manual

Function Overview

Function Overview
The T-TeleSec LineCrypt DSL provides protected data transfer via networks
that uses the PPPoE protocol.
The LineCrypt DSL acts as a link between a protected internal network and an
unprotected external network. The LineCrypt DSL is based on IP communica-
tion. That means: All other protocols, IPX for example, are not forwarded be-
tween internal and external sides by LineCrypt DSL.
LineCrypt DSL transfers the encrypted data through an IP Tunnel. In this way,
two or more LineCrypt in an unprotected network allow a protected Virtual Pri-
vate Network (VPN) to be set up.
The LineCrypt DSL can set up IP tunnels to LineCrypt DSL, L and SOHO. If the
IP addresses are assigned dynamically for the connection configuration, two Li-
neCrypt DSL require a directory service, which can be provided, for example,
by a LineCrypt L. The option of unencrypted connections with other IP equip-
ment can also be configured.
Ethernet
Ethernet
LineCrypt
LineCrypt
DSL−
Router/
DSL
Internet
Modem
L
Gateway
Fig. 1: LineCrypt protecting your network
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