1-20 CHAPTER 1: INTRODUCTION
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Bridge Filters
The LinkBuilder MSH 4 Port Ethernet Bridge M odule allows the
use of customised filtering, which can be used in addition to basic
transparent filtering, as explained in Learning, Filtering And
Forwarding on page 1-12. It supports the following custom
filtering modes:
■Host-to-Host filtering
■Host-to-Port filtering
■Port-to-Port filtering
■Multicast-to-Port filtering
■Protocol filtering
■Bit filtering
This section describes these filtering modes and filtering concepts
in general.

What Is Custom Filtering?

Custom filtering lets you selectively define the hosts that can
communicate through the bridge. When applied, the bridge
filters (discards) certain packets based on the contents of filter
sets. These filter sets can be edited by the bridge operator and are
used for indicating what devices' packets are to be filtered.
Figure 1-19, Figure 1-20 and Figure 1-21 illustrate how a bridge
performs custom filtering. This particular example shows
host-to-port filtering.