To add IP Address to allow access follow the steps given below.
1.Enter the IP Address in the IP Address field as shown in screen below.
2.Click 
button to save the IP Address or click 
button to cancel the changes and return back to the previous screen.
3.Once the IP Address is added, a confirmatory message 
is displayed on the screen.
4. To block a range of IP Addresses click on Range check box as shown in the screen below.
IP Range
5. Enter starting and last IP Address from the range in the From and To fields respectively.
6. Click button to save the IP Address or click button to cancel the process and return back to the previous screen.