Kerio Tech KERIO WINROUTE FIREWALL 6 - Manual (Page 127)

8.5 HTTP cache
127
Warning
Some web servers may attempt to bypass the cache by too short/long TTL.
• Ignore server Cache-Control directive — WinRoute will ignore directives for cache
control of Web pages.
Pages often include a directive that the page will not be saved into the cache.
This directive page may be misused for example to bypass the cache. Enable
the Ignore server Cache-Control directive option to make WinRoute accept only
no-store and private directives.
Note: WinRoute examines HTTP header directives of responses, not Web pages.
• Always validate file in cache — with each query WinRoute will check the server for
updates of objects stored in the cache (regardless of whether the client demands
this).
Note: Clients can always require a check for updates from the Web server (regardless of the
cache settings). Use combination of the Ctrl and the F5 keys to do this using either the Internet
Explorer or the Firefox/SeaMonkey browser. You can set browsers so that they will check
for updates automatically whenever a certain page is opened (then you will only refresh the
particular page).
URL Specific Settings
The default cache TTL of an object is not necessarily convenient for each page. You may
require not to cache an object or shorten its TTL (i.e. for pages that are accessed daily).
Use the URL specific settings button to open a dialog where TTL for a particular URL can be
defined.
Figure 8.17 HTTP cache — specific settings for URL