Operation Manual

Simple Installation and Operation
NT/MPRI – 1 Introduction 12
The security checks which can be activated for an incoming call from a
remote user are illustrated in the following figure:
Security mechanisms of the NT/MPRI: example of establishing a connection
Data Protection
The NT/MPRI offers the option of data encoding to protect data packets
from unauthorized access during transmission. The ECP (Encryption
Control Protocol), the symmetrical Twofish encoding algorithm and the
Routing and Remote-Access API expanded by the Crypt Provider API
guarantee an extremely high level of data protection on the ISDN line.
Simple Installation and Operation
Installation of the NT/MPRI is simple and menu-driven.
The NT/MPRI is configured and managed entirely via HTTP using a
standard browser like the Microsoft Internet Explorer or Netscape Navi-
gator. This means that the router can be operated and managed at any
time from any computer in the local network. The HTTP access is pass-
word-protected.
ISDN
D channel
B channel
Name/Password
D & B channel
B channel
B channel
Procedure
Screening of the
D-channel number
Authentication with
PAP or CHAP after
accepting a call
Option of clearing
connection and
security call-back by
the NT/MPRI
Additional PPP
negotiations, e.g. IP
address, spoofing,
channel bundling
Transmission of only
effective data, i.e.
TCP/IP and IPX/SPX
packets.
Optional data
encoding and
packet filtering.
ISDN connection
established and
cleared dynamically.
Remote Site
(e.g. NT/MPRI)
Local Side
(NT/MPRI)
ntmpri-e.book Seite 12 Donnerstag, 28. Februar 2002 11:26 11