Marmitek IP Camera series advanced installation guide

Network >> IP Filter
The IP Filter setting allows the administrator of the camera to limit
the users within a certain range of IP addresses to access the
camera.
Start/End IP Address
Assign a range of IP addresses that are not allowed to access the
camera by entering the Start IP address and End IP address.
When you are finished, click Add to save the range setting. You
can repeat the action to assign multiple ranges for the camera.
For example, when you enter 192.168.0.50 in Start IP Address
and 192.168.0.80 in End IP Address, the user whose IP address
located within 192.168.0.50 ~ 192.168.0.80 will not be allowed to
access the camera.
IP Eye Anywhere IP RoboCam 35