Lancom Systems LCOS 3.50 14.3 VPN connections in detail

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN

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Virtual Private Networks—

VPN

DES, key length 56 bit

IKE key exchange with Preshared Keys

Key exchange via Oakley, Diffie-Hellman algorithm with key lengths 768

bit, 1024 bit or 1536 bit, well-known groups 1, 2 and 5

Key management in accordance with ISAKMP

Apart from conventional IPSec implementations, LANCOM devices offer

extended functionality, such as the LANCOM Dynamic VPN that allows the

use of the high-security IKE Main Mode even with dynamic IP addresses.

In combination with the LANCOM Advanced VPN Client, a separate pre-

shared key can be used for each connection even when using IKE

Aggressive Mode connections.

14.3 VPN connections in detail

Two types of VPN connections are available:

VPN connections linking two local networks. This type of connection is

also known as a "LAN-LAN coupling".

The connection of an individual computer with a network, generally via a

dial-in connection (Remote Access Service – RAS).

The coupling of two remote networks is known as a LAN-LAN coupling. With

such a connection, the devices in one LAN can access those of the remote LAN

(assuming they have the necessary access rights).