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LANCOM WLC-4006 - LANCOM WLC-4025
Chapter 7: Linking two networks
7 Linking two networks
With the network interconnection (also known as LAN to LAN coupling) of the
LANCOM Router, two local networks are linked.
For coupling via VPN, the connection between both LANs is established over
a specially secured connection through the public Internet. A router with VPN
support is required in both LANs.
Always configure both sides
Both routers involved in the network interconnection must be configured.
Care must be taken to ensure that the configuration information provided
matches.
A setup wizard handles the configuration of the connection in the usual con-
venient manner.
Security aspects
You must, of course, protect your LAN against unauthorized access. A
LANCOM Router therefore offers a whole range of security mechanisms that
can provide an outstanding level of protection: Network couplings via VPN
transmit data by IPSec. The data are encrypted by AES, 3-DES, Blowfish or
CAST encryption algorithms.
7.1
What information is necessary?
The wizard will prompt you for the necessary information on a step-by-step
basis. If possible, however, you should have it available before launching the
wizard.
To explain the significance of the information requested by the wizard, we will
be using a typical deployment as an example: setting up a link between a
branch office and its headquarters. The routers involved are named
'HEAD_OFFICE' and 'BRANCH'.
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The following instructions will assume that LANCOM Router devices
are being used on both sides. A network interconnection may also be
realized with routers from other manufacturers. A mixed setup usually
requires more extensive configuration measures for both devices,
however. Please refer to the reference manual for more information in
this regard.
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