How to Set Up a Guest Wi-Fi Network

When visitors connect to your main Wi-Fi, their devices can potentially see your shared folders, printers, smart home cameras, and NAS drives. A guest network creates an isolated segment: internet access only, no access to your stuff. Every modern router supports this. Setup takes five minutes.

Why You Need One

A guest network is not about distrusting visitors. It is about limiting exposure. Any device on your main network can discover other devices. If a guest’s phone has malware, it cannot reach your computer’s shared files on the guest network. If you give your Wi-Fi password to a contractor, babysitter, or Airbnb guest, that password cannot be used to access your private network.

IoT devices (smart bulbs, robot vacuums, cheap cameras) with poor security should also go on the guest network. If they get compromised, the attacker is isolated from your computers and phones.

Step-by-Step Setup

Log into your router’s admin page (typically 192.168.1.1 or 192.168.0.1 in a browser). Find the username and password on the sticker on the bottom of your router.

Navigate to Wireless Settings, Guest Network, or Guest Access (the exact label varies by brand).

Enable the guest network. Give it a different name than your main network. Something like “Smith-Guest” makes it clear to visitors. Set a password (WPA2 or WPA3). Enable “Client Isolation” or “AP Isolation” if available, which prevents guest devices from communicating with each other.

Most importantly: make sure “Allow guests to access local network” or “Access Intranet” is turned OFF. This is the setting that prevents guests from seeing your devices.

Router-Specific Instructions

Netgear: Advanced > Wireless > Guest Network. Toggle it on, set the SSID and password.

TP-Link: Advanced > Wireless > Guest Network. Enable it and set the password. Check “Allow guests to see each other” is off.

ASUS: Guest Network tab in the admin page. You can set a time limit (guests automatically disconnect after 1, 4, 8, or 24 hours).

Mesh systems (eero, Google Wifi, Orbi): Open the companion app. Guest network setup is usually in the main menu. These systems make it especially easy, often just a toggle.

Create a QR code for your guest network. Search “QR code Wi-Fi generator” online, enter your guest SSID and password, and print the QR code. Frame it near your front door or on the fridge. Visitors scan it with their phone camera and connect instantly without you dictating a password.

On iPhone, you can also share your Wi-Fi password automatically: when a contact tries to connect to your network, your phone pops up a “Share Password?” dialog.

Bandwidth Control

Some routers let you limit guest network bandwidth so visitors cannot saturate your connection. Under guest network settings, look for “Bandwidth Control” or “QoS.” Set the guest network to a maximum of 25% to 50% of your total bandwidth. This ensures your devices always have priority.

Change the Guest Password Regularly

If you host frequently, change the guest password every few months. Anyone who had the old password can no longer connect. This is much easier than changing your main network password, which would require reconnecting all your devices.

Bottom Line

Log into your router, enable the guest network with a separate password, and ensure local network access is disabled. Put IoT devices on it too. Print a QR code for visitors. Five minutes of setup protects your entire home network.