ZyXEL Communications unified security gateway manual 203

Chapter 9 Monitor

The following table describes the labels in this screen.

Table 41 Anti-X > Content Filter > Cache

LABEL	DESCRIPTION
URL Cache
Entry
Refresh	Click this button to reload the list of content filter cache entries.
Flush	Click this button to clear all web site addresses from the cache
	manually.
Remove	Select one or more URL entries and click Delete to remove them from
	the cache.
#	This is the index number of a categorized web site address record.
Category	This field shows whether access to the web site’s URL was blocked	or
	allowed.
	Click the column heading to sort the entries. Point the triangle up to
	display the blocked URLs before the URLs to which access was allowed.
	Point the triangle down to display the URLs to which access was allowed
	before the blocked URLs.
URL	This is a web site’s address that the ZyWALL previously checked with
	the external content filtering database.
Remaining Time	This is the number of minutes left before the URL entry is discarded
(minutes)	from the cache.
URL Cache
Setup
Maximum TTL	Type the maximum time to live (TTL) (1 to 720 hours). This sets how
	long the ZyWALL is to keep an entry in the URL cache before discarding
	it.
	The external content filtering database frequently adds previously un-
	categorized web sites and sometimes changes a web site’s category.
	Setting this limit higher will speed up the processing of web access
	requests but will also make it take longer for the ZyWALL to reflect
	changes in the external content filtering database.
Apply	Click Apply to save your changes back to the ZyWALL.
Reset	Click Reset to return the screen to its last-saved settings.

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ZyWALL USG 20/20W User’s Guide