LANCOM 1811n Wireless – LANCOM 1821n Wireless
Chapter 5: Connecting two networks
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DNS access to the remote LAN
Remote computers in a TCP/IP network can be accessed not only with their IP
addresses, but also by freely definable names with the aid of DNS.
For example, the computer named 'pc1.branch_office.company (IP 10.0.2.10)
can access the server at the main office by using its IP address or the name
'server.main_office.company'. There is just one requirement: The domain of
the remote network must be entered into the Wizard.
The domain can only be specified in the LANconfig Wizard. With
WEBconfig, the necessary changes are made later in the manual con-
figuration. Refer to the LANCOM Router reference manual for more
detailed information.
VPN extranet
In the case of LAN-LAN connectivity via VPN, you can mask the individual
computers behind another IP address. The operating mode referred to as
'extranet VPN' enables computers to be made visible from the remote LAN not
with their own IP address, but with a freely definable address such as that of
the VPN gateway.
This avoids giving stations in a remote LAN direct access to the computers in
your own LAN. For example, if extranet VPN mode is set up to provide access
from the branch-office LAN to the main office from the IP address
'10.10.2.100', and computer '10.10.2.10' then accesses the server
'10.10.1.2', the server receives a request from the IP '10.10.2.100'. The actual
address of the computer is masked.
If LAN connectivity uses the extranet mode, the remote site does not receive
the actual (masked) LAN addresses, but the IP address published by the LAN
('10.10.2.100' in the above example). The netmask in this case is
'255.255.255.255'.
5.1.3
Settings for NetBIOS routing
NetBIOS routing is quick to set up: In addition to the specifying the TCP/IP pro-
tocol being used, the only other information required is the name of a Win-
dows workgroup in the LAN used by the router.
Remote Windows workgroups do not appear in the Windows network
environment, but they can be contacted directly (e.g.by searching for
a computer of known name).
