Learn how to isolate internal networks in OPNsense using firewall rules. This video builds upon an earlier video about the firewall rule order in OPNsense. These rules provide a solid foundation in which you can create additional rules to allow or deny access to other parts of your network as you see fit. 00:00 Introduction 00:46 New interface-- no rules 02:22 Allow all rule 03:24 1st way-- block LAN net 05:20 2nd way-- block private IP addresses 08:50 3rd way-- allow all except private IP addresses 11:50 A note about ICMP/ping 12:22 Conclusion 13:04 Outtakes EP19