User's Manual

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3. Enter a word or phrase and click the Add button.
4. Click Apply.
NOTES:
• The Keyword Filter is based on a DNS query. If a network client has already
accessed a website such as http://www.abcxxx.com, then the website
will not be blocked (a DNS cache in the system stores previously visited
websites). To resolve this issue, clear the DNS cache before setting up the
Keyword Filter.
• Web pages compressed using HTTP compression cannot be ltered. HTTPS
pages also cannot be blocked using a keyword lter.
4.6.4 Network Services Filter
The Network Services Filter blocks LAN to WAN packet exchanges
and restricts network clients from accessing specic web services
such as Telnet or FTP.