D-Link DSL-2640B User Manual page 73

Web Configuration
Click Add and the page for defining the IP filtering rule appears.
In this page, you can create a filter rule to identify outgoing IP traffic by specifying a
new filter name and at least one condition. All specified conditions in the filtering rule
must be complied with the rule to take effect.
Click Apply to save and activate the filter.
You can select the protocol from the drop-down list.
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D-Link DSL-2640B User Manual