Kerio Tech Firewall6 manual Memory cache size, Max Http object size, Cache Options

Models: Firewall6

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Chapter 5 Settings for Interfaces and Network Services

Memory cache size

Maximal memory cache size in the main storage. This cache is used especially to accelerate records to the cache on the disk.

If the value is too high the host’s performance can be affected negatively (cache size should not exceed 10 per cent of the computing memory).

Max HTTP object size

maximal size of the object that can be stored in cache.

With respect to statistics, the highest number of requests are for small objects (i.e. HTML pages, images, etc.). Big sized objects, such as archives (that are usually downloaded at once), would require too much memory in the cache.

Cache Options

Advanced options where cache behavior can be defined.

Continue aborted download — tick this option to enable automatic download of objects that have been aborted by the user (using the Stop button in a browser). Users often abort downloads for slow pages. If any user attempts to open the same page again, the page will be available in the cache and downloads will be much faster.

Cache redirect responses — HTTP responses that contain redirections will be cached.

Use server supplied Time-To-Live— objects will be cached for time specified by the Web server from which they are downloaded. If TTL is not specified by the server, the default TTL will be used (see the HTTP protocol TTL item).

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-storeand 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).

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Kerio Tech Firewall6 manual Memory cache size, Max Http object size, Cache Options