Setting Up Web Client Blocking - 3Com SUPERSTACK 3 WEBCACHE 3000 User Manual

162 C 10: U
HAPTER SING
Using Web Client
Blocking with DHCP
Servers
Setting Up Web
Client Blocking
C F
ONTENT ILTERING
Using a browser on a client machine whose IP address is not blocked
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by Web Client Blocking to access the Web Interface.
All client machines that you specify in the Cache Bypass screen will not be
prevented by the Webcache from accessing the Web. Cache Bypass takes
precedence over Web Client Blocking when the Webcache receives a
client machine request. For further information, see
page 186.
Dynamic Host Configuration Protocol (DHCP) servers can be used with
Web Client Blocking in two ways:
You can configure your network into subnets and assign specific client
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machines IP addresses within these subnets. You can then allow or
deny specific subnet IP address ranges access to the Web through the
Webcache using Web Client Blocking.
Example
You configure your user group A to use a subnet defined as
10.1.2.0-255, and user group B to use another subnet defined as
10.1.3.0-255. If you want to prevent everyone except group B from
accessing the Web, you would set the Web Client Blocking to Deny all
except and add the subnet 10.1.3.0-255 to the Web Client Blocking
list. Group B would then be able to access the Web, while everyone
else, including group A, would have no access to the Web.
You can configure your DHCP server to return specific IP addresses
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based on the requesting client machine's MAC address. You can
configure Web Client Blocking to block or allow specific client
machine IP addresses, or ranges of IP addresses, as appropriate.
To set up Web Client Blocking using the Web interface:
1 Log in to the Web interface.
2 Click Content Filter on the Toolbar.
3 Select Webcache Filtering > Web Client Blocking > Setup Client Blocking
in the Navigation Tree.
4 Check Enable Web Client Blocking.
5 Select either:
Deny all except — to stop all clients accessing the Web except for
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those you specifically allow.
"Cache Bypass" on