A networking expert will start talking about setting up VLANs in your router config and mucking with HOSTS files to redirect DNS calls. I haven’t set up a VLAN in a decade and wouldn’t want to ask someone to do that. DNS management is a constant hassle as each device will have it’s own call-home settings that could change with firmware updates.
So instead lets look at this in an off-the-shelf consumer grade solution. Right now you have, I hope, a router with a firewall protecting your home LAN from the internet. What you would do is use several of those to segment your network.
I’ve cobbled this together from notes on other sites. I believe Kevin Rose did one of the first “Internet of Things router configuration” articles a couple of years ago and he’s updated it at least once. He’s on This Week in Tech with Leo LaPorte. I’ve talked with some folks who are full time networking people and the basics here pass muster. The devil is in the details.
Option 3: - Gadgets separated from PCs/phones but still accessible and with cloud access.
Internet router - this one is connected to the outside world. It may be integrated with your DSL or cable modem or it may be a separate device. Firewall is always on. Wifi should be off.
Private Lan router - this one is where your PC, printer, and phones go. This would be your home WiFi. Firewall is always on.
Wifi better be secured. Change the password a couple of times a year; those HA devices hear enough traffic they can crack your keys over time.
HA router - this is where all gadgets go. It would have the Wifi for Vera, Nest & Dropcam. Wifi is secured, use different passwords from your Private LAN wifi.
This one does NOT have the firewall engaged; it is in bridge mode. The point of this router is to prevent a gadget from performing a “man in the middle” attack between the Private Lan and the Internet router. With the firewall off, devices on the Private Lan can connect directly to things in the HA router. The gadgets can still call home. If you need to cheap out on something, go cheap here because this does so little.
The Private LAN and HA router are both connected to the Internet Router.
Option 4 - gadgets severed from cloud, VPN access to gadgets. This one requires more devices and more time/money to configure.
Internet router - this one is connected to the outside world. It maybe integrated with your DSL or cable modem or it may be a separate widget. Firewall is always on. Wifi should be off.
Private Lan router - this one is where your PC, printer, and phones go. This would be your home WiFi. Firewall is always on.
Wifi better be secured. Change the password a couple of times a year; those HA devices hear enough traffic they can crack your keys over time.
VPN router - this router has VPN SERVER software and runs a firewall. It will be more expensive to buy with it included or require you to install custom firmware on a router. If you go the custom firmware route, get the most stripped down firmware possible. Features are security holes.
The Internet Router will need to designate the VPN router to be the “DMZ” device, meaning incoming traffic goes to that router. Since the VPN router has a firewall, it’s as safe as any other router. And since your LAN is behind its own firewall, your PCs are still safe as safe as if the Private LAN router were connected directly to the DSL/cable modem even if you fubar the settings on the internet router.
To access the devices behind this router you will need VPN CLIENT software on phones/PCs/etc with the keys/passwords matching the VPN SERVER. You will need a dynamic dns service, unless you have a static IP address from your ISP. If you don’t know what that is, you probably don’t have static IPs.
Blocker router -this router keeps gadgets from accessing the net. The firewall is on but you set this router up backwards, with the OUTSIDE/WAN port facing the HA router and the INSIDE/LAN port facing the VPN server. Any calls coming from the HA router are blocked, so no gadgets get to call home. But since the VPN router is “inside” the firewall, it can call “out” to the HA router. If you need a “Guest” wifi, put it here. This one can also be pretty cheap since it just needs a basic firewall.
HA router - this is where all gadgets go. It would have the Wifi for Vera, Nest & Dropcam. This one does NOT have the firewall engaged; it is in bridge mode. This is just a hub. With the firewall off, the VPN server has access to things in the HA router. The gadgets can’t call home, Blocker will stop that. If you need to cheap out on something, go cheap here because this does so little. In theory you could use some models of Vera here instead of a separate router but I wouldn’t recommend it. If you only have a Vera, you can skip this. But once you add Nest/DropCam/etc, you’ll need an HA router.
Option 3 is relatively cheap & easy and everyone should do it.
Option 4 is a pain in the behind and is my “only if I need to” scenario. I have all the parts in my closet if that day comes.