Lancom Systems 821 - Manual (Page 54)

LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN
̈ Chapter 6: Providing dial- up access
54
EN
6 Providing dial- up access
Your LANCOM supports dial-up connections to permit individual computers
full access to your network. This service is also known as RAS (Remote Access
Service). In principle, the RAS access can be realized in two different ways:
Only LANCOM
1621 ADSL/ISDN
and LANCOM 1711
VPN
̈
VPN: For a RAS access via VPN, the connection between the LAN and the
dial-in PC is established over a specially secured connection through the
public Internet. The router in the LAN requires VPN support, the dial-in PC
an access to the Internet and the LANCOM VPN Client.
̈ ISDN: For a RAS access via ISDN, a direct connection between the LAN
and the dial-in PC is established over an ISDN dial-up connection. The
router in the LAN requires an ISDN interface, the dial-up PC an ISDN
adapter or an ISDN modem. The data transfer protocol is PPP. Therefore,
the support of all usual devices and operating systems is ensured.
A setup wizard handles the configuration of the dial-up connection in the
usual convenient manner.
Security aspects
You must, of course, protect your LAN against unauthorized access. An
LANCOM therefore offers a whole range of security mechanisms that can pro-
vide an outstanding level of protection:
̈
VPN: Network couplings via VPN transmit data by IPSec. The data are
encrypted by AES, 3-DES, Blowfish or CAST encryption algorithms.
̈
ISDN: For network couplings via ISDN, the connection password, the
checking of the ISDN number and the callback function ensure the secu-
rity of the connection.
The ISDN call back function cannot be configured using the wizard. It
can only be set up in the expert configuration. For details, please see
the reference manual.
6.1 Which information is required?
The wizard will set up dial-up access for only one user. Please run the wizard
again for each additional user.