ZyXEL Communications ZyWALL 35 Series, User Manual

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Chapter 16 Content Filtering Screens
ZyWALL 5/35/70 Series User’s Guide
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Use this screen to view and configure your ZyWALL’s URL caching. You can also configure
how long a categorized web site address remains in the cache as well as view those web site
addresses to which access has been allowed or blocked based on the responses from the
external content filtering server. The ZyWALL only queries the external content filtering
database for sites not found in the cache.
You can remove individual entries from the cache. When you do this, the ZyWALL queries the
external content filtering database the next time someone tries to access that web site. This
allows you to check whether a web site’s category has been changed.
Please see Section 17.3 on page 348 for how to submit a web site that has been incorrectly
categorized.
Figure 190 SECURITY > CONTENT FILTER > Cache
The following table describes the labels in this screen.
Table 98 SECURITY > CONTENT FILTER > Cache
LABEL DESCRIPTION
URL Cache Setup
Maximum TTL Type the maximum time to live (TTL) (1 to 720 hours). This sets how long the
ZyWALL is to allow an entry to remain in the URL cache before discarding it.
Apply Click Apply to save your changes back to the ZyWALL.
Reset Click Reset to begin configuring this screen afresh.
URL Cache Entry
Flush Click this button to clear all web site addresses from the cache manually.
Refresh Click this button to reload the cache.
# This is the index number of a categorized web site address record.
Category This field shows the site category to which requested access belongs.
URL This is a web site’s address that the ZyWALL previously checked with the external
content filtering database.
Remaining Time
(hour) This is the number of hours left before the URL entry is discarded from the cache.
Modify Click the delete icon to remove the URL entry from the cache.