Belkin High Performance Wireless VPN Router N300 - Manual (Page 75)

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firewall
iP filter
You can choose whether to Deny or Allow computers with IP
Addresses listed from accessing certain Ports.
This can be used to control which Internet applications the computers
can access.
You may need to have knowledge of what Internet ports the
applications use.
iP filter
enable iP filtering Check this box to Enable the IP filtering feature.
Deny all clients with iP addresses
listed below to access the network
When selected, the computers with IP addresses specified will
be Denied access to the indicated Internet ports.
allow all clients with iP addresses
listed below to access the network
When selected, the computers with IP addresses specified will be
Allowed access only to the indicated Internet ports.