You can configure caching action settings for a proxy server. Caching actions are set to determine whether a response is cached. A caching action specifies the last modified factor and the default expiration to define how a response is cached.
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proxy_server_name action_name.Specifies a user-defined symbolic name for a caching action.
A caching action name must be unique and cannot contain an invalid character. The name field cannot contain the following characters: # \ / , : ; " * ? < > | = + & % '.
Specifies whether or not to enable caching for the proxy server.
Specifies the amount of time, in seconds, before a cached response expires. The default expiration determines the validity of cached responses for the URI that is associated with the cache rule.
Specifies the amount of time, in seconds, before a response is cached if the response does not have explicit HTTP expiration headers. The last modified time header must be specified in the response. The value is determined based on when an HTML file was last changed to prevent caching frequently modified files for long periods of time.