Bridge Filtering

NetBIOS Name Filtering

Introduction

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.

Example of

 

Figure 39 shows an example of how to configure NetBIOS Name Filtering in a

NetBIOS Name

Token Ring Source Rout Bridging application, however the same is true for Ethernet

Filtering

Transparent Bridging.

 

 

 

 

 

 

Boston Branch Office

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PC

 

 

 

 

LAN

 

 

 

 

 

 

 

 

 

 

 

WAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bridge

 

 

 

 

 

 

Bridge

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PC

 

 

 

 

Link 1

 

 

 

 

 

 

 

Link 5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PB S200

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BOSTON_FILE_01

 

Bridge Link Parameters

 

 

 

 

 

 

 

 

 

 

NetBIOS Name Filter Action: Block

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NetBIOS Name Filter Table

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

String Type:

ASCII

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NetBIOS Name

HOME*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Incoming NetBIOS Name

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Link Action:

PASS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outgoing NetBIOS Name

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Link Action

PASS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Home Office

LAN

PB S200

HOME_FILE_01

Figure 39. NetBIOS Name Filtering Configuration Example

What Is NetBIOS? 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.

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Bridging

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EXP Computer S200 manual NetBIOS Name Filtering, Broadcasts to and from the SVR* name pattern, Transparent Bridging