Controlling Browser Caching; Section 5.2, "Controlling Browser Caching - Novell ACCESS MANAGER 3.1 SP1 - GATEWAY GUIDE Manual

5 Modify the Cache Freshness settings for the Gateway Appliance. Use the Reset button to return
these settings to their default values.
These options govern when the proxy service revalidates requested cached objects against
those on their respective origin Web servers. If the objects have changed, the proxy service re-
caches them.
HTTP Maximum: Specifies the maximum time the proxy service serves HTTP data from
cache before revalidating it against content on the origin Web server. No object is served from
cache after this value expires without being revalidated.
This overrides a freshness or Time to Expire directive specified by the Webmasters if they
specified a longer time.
You use this value to reduce the maximum time the proxy service waits before checking
whether requested objects need to be refreshed. The default is 6 hours.
HTTP Default: Specifies the maximum time the proxy service serves HTTP data for which
Webmasters have not specified a freshness or Time to Expire directive. The default is 2 hours.
HTTP Minimum: Specifies the minimum time the proxy service serves HTTP data from
cache before revalidating it against content on the origin Web server. No requested object is
revalidated sooner than specified by this value.
This overrides the freshness or Time to Expire directive specified by the Webmasters if they
specified a shorter time.
You can use this value to increase the minimum time the proxy service waits before checking
whether requested objects need to be refreshed. This parameter does not override No Cache or
Must Revalidate directives from the origin Web server.
The default value is 0, which allows the proxy service to honor the Time To Expire directive of
each object (unless it is longer than the HTTM Maximum option). If the HTTP Minimum option
is set to a value other than 0, the value overrides any object's Time to Expire directive that is
shorter than the value set. The default is 0.
Continue Fill Time: Specifies the how long the proxy service ignores browser request
cancellations and continues downloading objects from the target Web server until the download
is complete. The default is 1 second.
HTTP Retries: Specifies the number of retry requests to issue to a Web server. The default is 4
retries.
6 To save your changes to browser cache, click OK.
7 To apply the changes, click the Access Gateways link, then click Update > OK.

5.2 Controlling Browser Caching

Webmasters control how browsers cache information by adding the following cache-control
directives to the HTTP headers:
Cache-Control: no-store
Cache-Control: no-cache
Cache-Control: private
Cache-Control: public
Pragma: no-cache
Configuring the Content Settings 143