Lancom Systems 8011 VPN manual Linking two networks, Always configure both sides, Security aspects

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LANCOM 7111 VPN – LANCOM 8011 VPN

Chapter 5: Linking two networks

5 Linking two networks

With the network interconnection (also known as LAN to LAN coupling) of the LANCOM router, two local networks are linked. The LAN to LAN coupling can be realized in principle in two different ways:

VPN: For coupling via VPN, the connection between both LANs is estab- lished over a specially secured connection through the public Internet. A router with VPN support is required in both LANs.

ISDN: For coupling via ISDN, a direct connection between both LANs is established over an ISDN connection. A router with ISDN interface 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.

The following instructions will assume that LANCOM router routers 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.

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:

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.

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