BELGACOM Forum 523, Mounting And Commissioning Manual

Page: 99 / 244

Branch Link 97
Configuration Examples
Branch Link
You can use the Forum 523/524 to interlink two LANs via ISDN or
via an encrypted VPN connection (Virtual Private Network).
In case of a VPN connection, both Forum 523/524 systems use an
Internet connection to transfer data. For encryption, the protocols
PPTP (Point to Point Tunneling Protocol) and IPSec (Secured IP)
can be used.
In case on an ISDN connection, you configure two Forum 523/524
systems so that they can dial in to each other.
In order for this to work, the two LANs must be configured for dif-
ferent IP address ranges (subnetworks). For at least one of the
Forum 523/524 systems, change the prescribed address range for
the LAN.
The Forum 523/524 in a LAN-to-LAN link
In the Configurator , Network: Branch menu you can configure
the dial-in settings.
z
PPTP : The Point-to-Point Tunneling Protocol provides a VPN
setup which is easy to configure. You provide on both sides a
password for the mutual authentication and encryption.
z
IPSEC : For higher security demands, you should use this
protocol to secure the VPN connection. You should transfer the
keys to be entered on the configuration page via a secured
channel (e.g. as disk file or via postal service).
z
ISDN : If an IP data transfer is required to the other LAN, the
Forum 523/524 initiates a dial-in via ISDN.
Forum
(IP=192.168.99.254,
Net=192.168.99.0)
S
0
Net
PC 2
Net
PC 1
Net Hub
Forum
(IP=192.168.11.254,
Net=192.168.11.0)
S
0
Net
PC 2
Net
PC 1
Net Hub
WAN WAN ISP