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LANCOM WLC-4006 - LANCOM WLC-4025
Chapter 7: Linking two networks
7.1.2
Settings for the TCP/IP router
In TCP/IP networks, addressing has a special significance. Please note that
two interconnected networks are logically separate from one another. Each
must therefore have its own network number (in our example, '10.0.1.x' and
'10.0.2.x'). These network numbers may not be identical.
Unlike when accessing the Internet, all of the IP addresses in the involved net-
works are visible on the remote side when coupling networks, not just those
of the router. The computer with the IP address 10.0.2.10 in the branch office
LAN sees the server 10.0.1.2 in the headquarters and can access it (assuming
it has the appropriate rights), and vice versa.
DNS access to the remote LAN
Thanks to DNS, it is not only possible to access remote computers in a TCP/IP
network via their IP address, but also by using freely defined names.
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If you haven't already named your LANCOM Router, the wizard will ask
you for a new, unique device name. With this entry, you will rename
your LANCOM Router. Be sure to give the two devices different names.
The name of the remote station is needed for its identification.
The Shared Secret is the central password for security within the VPN.
The exact same password has to be entered on both sides
10.0.1.2
10.0.1.100
(0123) 123456
LAN of head office.
IP: 10.0.1.0,
Netmask: 255.255.255.0
Domain: 'head.company'
'server.head.company'
'pc1.branch.comany
10.0.2.10
VPN or ISDN
connection
10.0.2.100
(0789) 654321
LAN of branch office.
IP: 10.0.2.0,
Netmask: 255.255.255.0
Domain: 'branch.company'
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