Netbios Name Filtering - 3Com PathBuilder S200 Series Owner's Manual

Bridge Filtering

NetBIOS Name Filtering

Introduction
Example of
NetBIOS Name
Filtering
Boston Branch Office
PC
PC
BOSTON_FILE_01
What Is NetBIOS?
76
The NetBIOS Name Filtering feature compares NetBIOS broadcasts to a "pattern"
that may have a wild card "*" character at the end. For example, if all servers have a
naming convention with the first part of the name the same, for example, "SVR...",
then you can complete only one entry in the NetBIOS Filter Table to permit
broadcasts to and from the "SVR*" name pattern.
Figure 39 shows an example of how to configure NetBIOS Name Filtering in a
Token Ring Source Rout Bridging application, however the same is true for Ethernet
Transparent Bridging.
LAN
Bridge
Link 1
PB S200
Bridge Link Parameters
NetBIOS Name Filter Action: Block
NetBIOS Name Filter Table
String Type:
NetBIOS Name
Incoming NetBIOS Name
Outgoing NetBIOS Name
Figure 39. NetBIOS Name Filtering Configuration Example
Network Basic Input Output System (NetBIOS) is a session-level protocol
standardized by IBM that serves as one of the main Application Programming
Interfaces (APIs) for local area network software. Software such as SNA 3270
emulation packages and Lotus Notes operate on top of the NetBIOS layer. Microsoft
LAN Manager uses NetBIOS extensively for identifying clients and servers.
NetBIOS is based on 16-character named "services" that connect to each other.
Servers advertise their implementation of a named service, and clients try to find
servers by transmitting broadcast frames that contain the name of the service they
want.
WAN
Bridge
Link 5
ASCII
HOME*
Link Action: PASS
Link Action PASS
Home Office
LAN
PB S200
HOME_FILE_01
Bridging