Deploying the Webcache in Your Network 35

If the Webcache fails, the Layer 4 device will detect the failure and redirect Web requests to the WAN, if the device supports Webcache health-checks, ensuring that access to the Web is maintained.

Deploying the Webcache in Transparent mode has benefits for the security of your network. It ensures that only client machines that are inside your network can access the systems and resources within it. This eliminates the need for serious access controls.

Migrating from Proxy Client machines with Web browsers that are configured to use the Cache to Transparent Webcache as a Proxy Cache (either directly or through Browser

Cache Mode Auto-Configuration) can continue to use the Webcache as a Proxy Cache if you change the Webcache to a Transparent Cache deployment. This allows you to gradually migrate the client machines in your network from a pure Proxy Cache configuration to a pure Transparent Cache configuration, by changing the Web browsers to Transparent Cache mode as required.

Deploying the The following example describes how to install the SuperStack 3 Firewall SuperStack 3 Firewall (3CR16110-9x) as a Proxy Forwarder. The network layout is shown in

as a Proxy Forwarder Figure 11 below.

Figure 11 Deploying the Firewall and Webcache Together

 

 

 

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SuperStack 3

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1Install the Webcache as described in this Chapter, taking into account any safety information.

a Install the Webcache on a Hub or Switch connected to the DMZ port of the Firewall. Use the LAN port of the Webcache for this connection.