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50 CHAPTER 3: CONFIGURING WEB BROWSERS
You 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 FTP
fields.
7 Enter the caching port number on which the Webcache is listening in
each Port field. The default port number is
8080.
8 Click OK.
3Com recommends that you configure the client machine that you use to
manage the Webcache so that it does not use the Webcache as a proxy
server. 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 Direct
Connection to the Internet.
Proxy Auto
Configuration (PAC)
File Scripts
You can use a Proxy Auto Configuration (PAC) file to configure the Web
browser on each client machine. PAC files allow you to create
configuration rules that determine how the Web browser operates when
the Webcache is being deployed as a Proxy cache. The PAC file can be
stored either on the Webcache or a network server, and the Web browser
is set to read the PAC file when it is opened.
The main disadvantage of PAC files is that the PAC file is read once when
the Web browser is first opened, and then executed within the browser
for every object within every Web page visited. This can cause a perceived
response time degradation, although the performance degradation is
likely to be small.