- Kerio WinRoute Firewall Administrator's Guide

Chapter 5 Settings for Interfaces and Network Services

TTL

TTL of objects matching with the particular URL.

The 0 days, 0 hours option means that objects will not be cached.

Cache status and administration

WinRoute allows monitoring of the HTTP cache status as well as manipulation with ob-

jects in the cache (viewing and removing).

Note: In older versions of WinRoute, these features were included in the web interface

whereas since 6.3.0 they are integrated in the Administration Console.

At the bottom of the Cache tab, basic status information is provided such as the current

cache size occupied and eﬃciency of the cache. The eﬃciency status stands for number

of objects kept in the cache (it is not necessary to download these objects from the

server) in proportion to the total number of queries (since the startup of the WinRoute

Firewall Engine). The eﬃciency of the cache depends especially on user behavior and

habits (if users visit certain webpages regularly, if any websites are accessed by multiple

users, etc.) and, in a manner, it can be also aﬀected by the conﬁguration parameters

described above. If the eﬃciency of the cache is permanently low (less than 5 per cent),

it is recommended to change the cache conﬁguration.

Figure 5.25 HTTP cache status information

Use the Manage cache content... button to open a dialog where objects kept in cache can

be viewed, searched and/or removed.

To view objects in cache, specify the searched object in the URL entry. Ob-

jects can be speciﬁed either by an absolute URL (without protocol) — e.g.

www.kerio.com/image/menu.gif or as a URL substring with

(substituting any num-

ber of any symbols and characters) and ? (question mark substitutes a single character

or symbol) wildcard symbols. Example: Search for the

ker?o

string lists all objects

with URL matching the speciﬁcation, such as kerio, kerbo, etc.

Each line with an object includes URL of the object, its size in bytes (B) and number of

hours representing time left to the expiration. To keep the list simple and well-organized,

up to 100 items are displayed at a single page. The Previous and Next buttons can be

used for browsing through the list pages.

The Remove button can be used to delete the selected object from the cache.