99
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
filtered. HTTPS pages also cannot be blocked using a keyword
filter.
4.9.4 Network Services Filter
The Network Services Filter blocks LAN to WAN packet exchanges
and restricts network clients from accessing specifi c web services
such as Telnet or FTP.
