User's Manual

Chapter 9 Monitor
ZyWALL USG 20/20W User’s Guide
203
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
(minutes)
This is the number of minutes left before the URL entry is discarded
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.