Avaya BCM 4.0 Networking Konfigurationsanleitung PDF herunterladen (Seite 691)

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BCM 4.0 Networking Configuration Guide

Chapter 70

Configuring Web Cache

When you use BCM as a web proxy, BCM can store, or cache, information downloaded from the

Internet. A proxy is a server that acts on behalf of another. Web caching allows LAN workstations

to share common information downloaded from the Internet.

The Web Cache on the BCM supports the LAN, WAN, and DIALUP interfaces.

With BCM configured as a web proxy with web caching:

• LAN workstations have shorter download times.

• The system stores previously downloaded information for future use by all workstations on the

LAN.

• BCM retrieves information from the Internet only if it is not already cached or if the cached

file is out of date compared to the information on the Internet.

To use the Web Cache on the BCM, you must configure the client computer to use an Internet

Proxy at port 6800, where the internet proxy is the BCM.

The web proxy also provides security features similar to the DNS proxy. It hides all of the internal

browsers’ IP addresses from external web servers. External web servers see only the BCM IP

address.

Guidelines for using Web caching/Proxy

The BCM web proxy uses a web server for running in HTTP-Proxy mode.

Consider the following guidelines when using web caching/proxy:

• You cannot use the web server installed on BCM as a general purpose HTTP server. It is only

used by the BCM web-based management client and Web Cache services.

Security Note: When Web Cache is enabled, the proxy service is also enabled on all of

the network interfaces. If your BCM is connected to an external interface, it is possible for

someone on the external network to use the proxy service to access one of the internal

networks.

To block the proxy service on any of the network interfaces, select the check box beside

the interface you want to block in the Proxy Blocked Interfaces field.

The default for the Proxy Blocked Interfaces field is selected (blocked) for the LAN1

interface.

When Web Cache is disabled, the proxy service is also disabled on all the network

interfaces

Refer to “Important Web Cache considerations” on page 694 for more details.

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