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ADVANCED FUNCTIONS
Protocol
— If the service you need is not listed, you can create a new service
yourself. Select “TCP” or “UDP” from the drop-down menu and follow the Port
Range instructions below. If you’re not sure which Protocol to use, select “Both.”
Port Range
— Enter the port range of the new service. To specify ports 80 to 90,
enter “80-90”; to apply this rule to a single port, just enter the port number.
Add
— Click to save the settings. You’ll be re-directed to the previous menu, and
the rule you just set will appear in the IP Filtering Table.
Reset
— Click to remove all entries.
3.3.3 URL Blocking
To prevent computers in the local network from accessing certain Web sites, you
can define the Web sites, IP addresses or keywords here. This function is useful
for parents and company managers: The former can protect children from
inappropriate contents on the Internet; the latter can protect employees from
losing their jobs.
You can block full Web site URLs, such as “www.microsoft.com”; IP addresses,
such as “207.46.232.18.2”; or just a part of a URL. For example, if you enter the
keyword “downloads,” the computer can connect to “www.microsoft.com” but not
“www.microsoft.com/downloads.”
Enable URL Blocking
— Check to enable this function; uncheck to disable.
URL/Keyword
— Enter the URL (host name or IP address of a Web site, such as
