You mean all traffic?
Go to Policy & Objects > Objects > Addresses and click Create New
Name: badIP (or whatever)
Type IP/Netmask
Subnet / IP Range 63.247.65.42
Hit OK
OPTIONAL:
If you plan to repeat the process with other IPs click the down arrow next to Create New :downwards_button: and select Address Group
Name: badIPs (or whatever) and add the IPs to the members menu.
OK
Go to Policy & Objects > Policy > IPv4 and Create New
Incoming Interface: internal (or where your clients are located)
Source Address: all (unless you have an object for your internal network)
Outgoing Interface: wan (your internet facing interface)
Destiation Address: badIP(s)
Service: any
Action: Deny
OK
Test and done.
