Linkskey LKR-604 - Manual (Page 46)

LKR-604
38
Client Filtering
To block certain client PCs from accessing the Internet:
You can filter Internet access for local clients based on IP addresses,
application types, (i.e., HTTP port), and time of day.
For example, this screen shows that clients in the address range
192.168.0.50-60 are blocked from using FTP (Port 21) from Sunday to
the following Saturday and from 2:00AM to 11:00 PM