D-Link DFL-1100 User Manual page 138

Navigate to the Firewall tab, Content Filtering section of the web-administration.
Click the check box next to each filter you would like to enable.
Once finished selecting additional filters, click Apply to save changes or Cancel to clear.
HTTP Rule using the HTTP ALG
Now that the content to be filtered has been decided on, a rule needs to be configured for
each interface that this filtering should be applied to utilizing the HTTP ALG. This will require a
rework of the default outbound policy to eliminate the chance of unfiltered HTTP traffic passing
through the Firewall. The idea is to remove the most general allow rule and configure rules to
allow essential services such as DNS as well as HTTP to pass the Firewall.
To disable the default general allow all rule -
Navigate to the Firewall tab, Policy section of the web-administration.
Select the appropriate policy based on desired effect (LAN->WAN or DMZ->WAN).
Click Edit next to the default allow all rule.
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