LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter 6: Connecting two networks
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6 Connecting two networks
Network connectivity, also known as LAN-LAN connectivity, with the
LANCOM Router is used for interconnecting two local area networks. LAN-
LAN connectivity can be implemented in two basic ways:
VPN
: Connecting LANs over VPN ensures that the Internet-based connec-
tion between the two LANs has high-security protection. Each LAN must
be equipped with a VPN-capable router.
ISDN
: Connectivity based on ISDN uses a direct connection between the
two LANs via an ISDN connection. Each LAN must be equipped with a
router with an ISDN interface.
Setting up LAN-LAN connectivity is carried out with the familiar convenience
of a Setup Wizard.
Always configure both ends
Both of the routers for LAN-LAN connectivity must be configured. Note that
the configuration information at both ends must match.
The following instructions assume that LANCOM Routers are being
operated at both ends. It is possible to set up network connectivity
between routers from other manufacturers. However, this mixed con-
figuration frequently requires far-reaching modifications to both
devices. In cases like this refer to the Reference Manual.
Security aspects
Of course your LAN has to be protected from unauthorized access. For this
reason, a LANCOM provides a range of security mechanisms that offer an out-
standing level of protection.
VPN
: VPN-based connectivity relies on IPsec for transferring data. The
encryption methods employed are 3-DES, AES or Blowfish
ISDN
: Security for ISDN-based connectivity relies on password protection,
a check of the ISDN number, and the call-back function.
The ISDN call-back function cannot be set up by Wizard, but in the
manual configuration only. Refer to the reference manual for informa-
tion on this.
