Follow these steps to add an IP filter:
You can specify either computer name, IP address, a range of IP addresses or IP subnet in the following format:
•IP address: a.b.c.d
•IP address range: a.b.c.d-ax.bx.cx.dx
•Subnet: a.b.c.d/ay.by.cy.dy
•Host name: any.host.name.com
•Computer name: MYLAPTOP
Click OK or Apply to save your changes.