Range IP Blocked

Hi @shopy95

Welcome to Zyxel community

Here is the example setting of how to block a range of IP address

Go to Configuration > Object > Address/Geo IP > Address >click Add 

Address Type select : RANGE

After setup IP Range, go to Configuration > Security Policy > Policy Control > Add the rule to block the IP range

Here is the reference related discussion .

https://businessforum.zyxel.com/discussion/1285/how-to-block-the-ip-address-on-zyxel-usg-60-firewall