ZyXEL ZyWALL 5 User Guide - Page 346

Chapter 17 Content Filtering Screens 17.9 Content Filtering Cache Click SECURITY > CONTENT FILTER > Cache to display the CONTENT FILTER Cache screen. 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 18.4 on page 354 for how to submit a web site that has been incorrectly categorized. Figure 195 SECURITY > CONTENT FILTER > Cache 346 The following table describes the labels in this screen. Table 99 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 This is the number of hours left before the URL entry is discarded from the cache. (hour) Modify Click the delete icon to remove the URL entry from the cache. ZyWALL 5/35/70 Series User's Guide