LANCOM 821+ – LANCOM 1711+ VPN – LANCOM 1721+ VPN
Chapter 1: Introduction
11
EN
The RAS PCs connect to the headquarters LAN via the Internet.
The Internet is available virtually everywhere and typically has low access
costs. Significant savings can thus be achieved in relation to switched or ded-
icated connections, especially over long distances.
The physical connection no longer exists directly between two participants;
instead, the participants rely on their connection to the Internet. The access
technology used is not relevant in this case: Broadband technology such as
DSL (Digital Subscriber Line) is ideal. A conventional ISDN line can be used,
too.
The technologies of the individual participants do not have to be compatible
to one another, as would be the case for conventional direct connections. A
single Internet access can be used to establish multiple simultaneous logical
connections to a variety of remote sites.
The resulting savings and high flexibility makes the Internet (or any other IP
network) an outstanding backbone for a corporate network.
What can your LANCOM Router do?
The following table contains a direct
comparison of the properties and functions of your devices with other models:
LA
NCO
M
821
+
LA
NCO
M
171
1+ VP
N
LA
NCO
M
172
1+ VP
N
Applications
Internet access
✔
✔
✔
LAN to LAN coupling via VPN
✔
✔
LAN to LAN coupling via ISDN
✔
✔
✔
RAS server (via VPN)
✔
✔
RAS server (via ISDN)
✔
✔
✔
IP router
✔
✔
✔
IPX router (via ISDN), e.g. for coupling of Novell networks or dialling into
Novell networks
✔
NetBIOS proxy for coupling of Microsoft peer-to-peer networks via ISDN
✔
✔
✔
DHCP and DNS server (for LAN and WAN)
✔
✔
✔
N:N mapping for coupling networks using the same IP address ranges
✔
✔
✔
Bridge function for coupling networks via ISDN connection
✔
✔
✔
