Hello @MikeC,
Have you considered creating a separate VLAN to place these machines/computers into?
We find VLANs a lot easier to manage once setup, it also allows you the flexibility of having those machines run on DHCP and if you need to add or remove machines to not have to necessarily change the programming of the router, there are several guides on VLANs here in the forum if you are interested. Creating VLANs using Peplink’s InControl2 is one of the best and easiest we work with in the industry. You don’t need a Networking Degree to set them up if you work with the information available here.
Here is a guide to setting up VLANs using InControl2 for printer isolation, the principles can also be taken further for network isolation and IoT segregation.
You also may find it beneficial to have a look at this previous forum thread, it highlights six different threads on setting up VLANs, most of it is to do with InControl2 though there is some good information there.
You can also do this search within the forum “how to setup VLAN”.
Happy to Help,
Marcus 