D-Link DI-604 - Manual (Page 25)

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ADVANCED > FILTERS > IP FILTERS
Filters
Filters are used to deny or allow LAN computers from accessing the Internet. The
DI-604 can be setup to deny internal computers by their IP or MAC addresses.
The DI-604 can also block users from accessing restricted web sites.
IP Filters
Use IP Filters to deny LAN IP addresses from accessing the Internet. You can
deny specific port numbers or all ports for the specific IP address.
IP: The IP address of the LAN computer that will be denied access to the Internet.
Port: The single port or port range that will be denied access to the Internet.