50 CHAPTER 3: CONFIGURING WEB B ROWSERSYou can view the port number for the Webcache by:a Logging into the Web Interface.b Selecting Device View -> System -> Caching -> Set Caching Mode.8 Click OK.To manually configure Netscape Navigator 4.5:1 Open Netscape Navigator.2 From the Edit menu, click Preferences.3 Click the Advanced category and click Proxies.4 Select Manual Proxy Configuration.5 Click View.6 Enter the URL or location of the Webcache in the HTTP, Security and FTPfields.7 Enter the caching port number on which the Webcache is listening ineach Port field. The default port number is 8080.8 Click OK.3Com recommends that you configure the client machine that you use tomanage the Webcache so that it does not use the Webcache as a proxyserver. In Internet Explorer, select Tools -> Internet Options ->Connections -> LAN Settings and disable Use a Proxy Server. In Netscape,select Edit -> Preferences -> Advanced -> Proxies and select DirectConnection to the Internet.Proxy AutoConfiguration (PAC)File ScriptsYou can use a Proxy Auto Configuration (PAC) file to configure the Webbrowser on each client machine. PAC files allow you to createconfiguration rules that determine how the Web browser operates whenthe Webcache is being deployed as a Proxy cache. The PAC file can bestored either on the Webcache or a network server, and the Web browseris set to read the PAC file when it is opened.The main disadvantage of PAC files is that the PAC file is read once whenthe Web browser is first opened, and then executed within the browserfor every object within every Web page visited. This can cause a perceivedresponse time degradation, although the performance degradation islikely to be small.
