How to Set Up a Guest WiFi Network — Protect Your Home Security
A guest WiFi network isolates visitors and IoT devices from your main network — preventing access to your computers, NAS drives, and smart home devices. Most modern routers support it in minutes. Test your current network performance at instantspeedtest.net/.
Guest WiFi Benefits — Why You Should Set It Up Today
| Benefit | Without Guest Network | With Guest Network |
|---|---|---|
| Visitor access | Same network as your devices | Internet only, isolated |
| IoT device isolation | Smart devices can see your PCs | IoT separated from main devices |
| Security risk if guest device has malware | Can scan/attack your network | Contained to guest segment |
| Password sharing | Gives main network access | Separate password for guests |
| Network performance | Guests compete with your devices | Can bandwidth-limit guests |
How to Enable Guest WiFi — Router by Brand
Asus: Advanced Settings → Wireless → Guest Network → Enable, set SSID and password, check “Isolate intranet access.”
TP-Link: Advanced → Wireless → Guest Network → Enable, configure SSID and password.
Netgear: Advanced → Wireless Settings → Enable Guest Network → configure and apply.
Google/Nest WiFi: Google Home app → WiFi → Guest network → Enable and set password.
Eero: eero app → + → Add guest network → set name and password.
The key setting to enable: “Access to my local network: Disabled” or equivalent. This prevents guest network devices from seeing your main network devices. See our smart home network guide.
Related Guides
- Smart Home Internet Speed
- How Many Devices on WiFi?
- What Is UPnP?
- Does a Router Affect Speed?
- 2.4 GHz vs 5 GHz WiFi
- How to Speed Up Your Router
Frequently Asked Questions
Does guest WiFi slow down my main network?
A guest network uses the same physical radio as your main WiFi — bandwidth is shared between all networks on the same radio. Active guest devices streaming or downloading will reduce available bandwidth for your devices just as any additional home device would. To minimize impact: set bandwidth limits on the guest network (most routers support this) to cap guest speeds at 25–50 Mbps. This provides plenty for visiting guests while protecting your household’s connection quality.
Can I put IoT devices on guest WiFi?
Yes — isolating smart home devices (thermostats, cameras, light switches) on the guest network or a dedicated IoT VLAN is a security best practice. These devices rarely need to communicate with your computers and are often poorly secured targets for hackers. Isolating them means a compromised smart bulb can’t access files on your desktop PC. The trade-off: some smart home platforms require devices on the same network as the controlling app — test before committing to full IoT isolation.