ELSA LANCOM Business 6000, Manual

Page: 74 / 174

Operating modes and functions
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ELSA LANCOM Business 6000
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the routing of those packets that are actually required. After the NetBIOS
module has been switched on and an unspecified waiting time has
elapsed, a connection is established to the NetBIOS remote stations
(insofar as these are not individual remote access workstations). The
duration of the waiting period will be increased if the connection cannot
be established. The following exchange of NetBIOS information then fills
the billboard for the first time.
In its proxy function, the unit answers queries to computers already
known in the NetBIOS module (on the billboard) by proxy for those
computers. After the initial exchange of information, no new connections
are established as a result of queries to workstations in the local
network, or to known workstations in the remote network.
The preset IP filter for NetBIOS ports intercepts packets with queries for
stations not present in either the LAN, or as established NetBIOS remote
stations, thus preventing the establishment of a connection via the DEFAULT
route to the Internet.
6.6.3 Which preconditions must be fulfilled?
A number of components must be installed on the participating workstations
and a variety of settings made in the operating system to ensure correct
communications via routers for the interconnection of Windows networks.
Installed components
The installation of the required components will be illustrated here on the
basis of Windows 95 or Windows 98; the procedure for Windows 2000 and
Windows NT 4.0 is similar. Install the following components on all
workstations in the Windows networks to be interconnected:
Network protocol
NetBIOS is completely independent of the transport protocol used.
NetBIOS network data can thus be transferred using the NetBEUI
(NetBIOS Extended User Interface), IPX (Internet Packet eXchange,
Novell) or IP (Internet Protocol) protocols.
Unlike IPX and IP, NetBEUI is not routable and is thus only available in
Windows networks. If multiple Windows networks are to be interconnected