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About Zone Bridging Rules

Note: This topic applies to the Hearst Release.

By default, all internal network zones are isolated by the Smoothwall. Zone bridging modifies this in order to allow communication to take place between a pair of network zones.

A zone bridging rule defines a bridge in the following terms:

Term

Description

Zones

Defines the two network zones between which the bridge exists.

Direction

Defines whether the bridge is accessible one-way or bi-directionally.

Source

Defines whether the bridge is accessible from an individual host, a range of hosts, a network or any host.

Destination

Defines whether the bridge allows access to an individual host, a range of hosts, a network or any hosts.

Service

Defines what ports and services can be used across the bridge.

Protocol

Defines what protocol can be used across the bridge.

It is possible to create a narrow bridge, for example, a one-way single-host to single-host bridge using a named port and protocol, or a wide or unrestricted bridge, for example, a bi-directional any-host to any-host bridge using any port and protocol.

It is recommended you make bridges as narrow as possible to prevent unnecessary or undesirable use.