Deploying the Webcache in Your Network 33Deploying theWebcache in YourNetworkYou must determine how you are going to deploy the Webcache in yournetwork. The Webcache can be deployed in two ways: Proxy Cache mode — The Webcache is connected to a Layer 2 switchin your LAN. You must configure the Web browser on each clientmachine in your network to direct its Web requests to the Webcache. Transparent Cache mode — The Webcache is connected to a Layer 4redirection device — a switch, router or firewall in your LAN which iscapable of Redirection. No configuration of the Web browser on eachclient machine is needed because the Layer 4 device automaticallyredirects Web requests to the Webcache.CAUTION: 3Com recommends that you deploy your Webcache on theLAN side of a firewall, or on the SuperStack 3 Firewall's DMZ port asdescribed in “Deploying the SuperStack 3 Firewall as a Proxy Forwarder”on page 35.The term “Web requests” refers to three types of network traffic; HTTP,HTTPS (SSL encrypted) and HTTP-FTP. The Webcache can accept all ofthese traffic types. In Proxy Cache mode, you should configure the Webbrowser on each client machine to use the Webcache as the server foreach of these protocols.HTTPS (SSL encrypted) traffic is only passed through by the Webcache; itis not decoded or cached.Proxy Cache Figure 9 Proxy Cache DeploymentServerServerClient MachineClient MachineClient MachineWANLANWAN GatewayWebcacheSuperStack 3®3C16116Webcache 3000Power/Self testActivityCache Storage Status green = okyellow = failed green = 100 Mbpsyellow = 10 MbpsLink Status31 2Cache Storage Status32Link StatusActivityLANLANLAN WAN
