Chapter 4 Configuring the Appliance 37
FTP cached
objects expire
Specifies how long the appliance will keep FTP objects in the
cache. You can specify from 15 minutes to two weeks.
Internet
Explorer
requests force
a check with
the origin
server
Configures the appliance to treat Microsoft Internet Explorer
requests more conservatively, providing fresher content at the
cost of serving fewer objects from the cache according to the
following options:
❚never: never force a freshness check with the origin server
❚for IMS revalidation requests: only force a freshness check
for IMS (If Modified Since) revalidation requests
❚always: always force a freshness check with the origin
server
Certain versions of Microsoft Internet Explorer do not request
cache reloads from reverse proxies and transparent caches
when the user presses the browser Refresh button. This can
prevent content from being loaded directly from the origin
servers.
Option Description (Continued)