A distinct SSID can help with network identification but doesn't significantly boost security on its own.
A distinct SSID can help with network identification but doesn't significantly boost security on its own.
I've been studying basic network security for a home setup (SOHO) and am trying to implement some improvements. I'm unsure if my actions are making a real difference, especially since I'm not fully grasping what's happening behind the scenes. My research highlighted how risky IoT devices often are—they're usually poorly configured and lack strong security. My guide recommended setting up a separate network for these devices so they wouldn't interfere with my main devices. I created two distinct SSIDs: one for 5GHz IoT gadgets and another for 2.4Ghz IoT devices. Each has its own password, separate from my primary network. My computers and other devices remain on the main network, while the cameras and Alexa are on their respective IoT networks. I believed this separation would add a layer of protection. But when I tried connecting a printer to the IoT network, it still worked fine from my main network computer. This implies there might not be a solid wall between the networks. Does this mean my IoT devices have the same access as before? Would using a different SSID and password really matter if everything still flows through the same router? I'm not sure if buying a separate router or getting a different IP address is necessary to achieve that level of separation. Thanks for your help—I'm still new to this!
DMZ involves positioning a single device outside the NAT, typically on the WAN side, allowing broader internet access without routing through the router. A separate SSID helps, but it only matters if the underlying physical network provides similar separation. Some devices can use multiple LAN subnets or VLANs, which moves us toward managed switches. Ultimately, the approach depends on what IoT devices require—whether they need internet access or isolation. If certain items shouldn’t connect to the web, isolating them via VLAN or a distinct network is wise. Many organizations separate security cameras into their own switch, keeping them close to main campus switches for efficiency. However, this also limits communication between devices, so you wouldn’t be able to print unless everything stays on the same network.
The request added no real value, only increased stress. To properly isolate IoT devices, you’d need a separate network segment with firewall protection, or use a router that supports VLANs combined with a managed Wi-Fi access point featuring multiple subnets and strict traffic rules. Alternatively, placing all IoT devices behind another router with double NAT could provide some mitigation, though it’s less ideal. You can find helpful guidance in Lawrence Systems’ YouTube content on topics like pfSense and IoT.
The concept of a “DMZ” refers to a dedicated area situated between WAN and LAN networks. Public servers are typically hosted in this zone. Only equipment within the DMZ receives public IP addresses and can forward ports. All communication across the DMZ—between WAN and LAN, or vice versa—gets independently protected and checked. For instance, WAN might restrict access to HTTPS only, while LAN allows SSH and RDP. DMZ servers can query the LAN’s DNS and handle certain database connections, but with thorough inspection and logging, blocking most traffic. In my setup, IoT devices operate on a separate VLAN/subnet, reaching internal DNS and connecting externally, while LAN stays isolated from them. This approach enhances security by limiting what IoT can do inside the network.
Thanks! Your responses were really useful. Now it's time to experiment with subnets!