Set up a guest Wi-Fi network and test its isolation

A guest network is useful for visitors and sometimes for smart devices, but its name alone does not guarantee isolation. Routers vary: some guests can still see local printers or computers, while others block all local access. Test the behavior instead of assuming the label does the work.

Configure it safely​

1. Sign in to your router's own app or local admin page. Find Guest network or Guest Wi-Fi. If the router belongs to your internet provider, use its official instructions rather than a random configuration app.
2. Give the guest network a distinct name and strong password. Use WPA3 if supported by guests' devices, or WPA2-AES as a compatible choice; avoid an open network. Do not reuse the router's admin password.
3. Look for a setting such as Allow access to local network or Intranet access. Turn it off if guests need only internet. If a printer or casting device must be reachable, decide deliberately whether that exception is acceptable.
4. Connect a spare phone to the guest network. Confirm it reaches the internet, then try to reach a known local device. Repeat after a router firmware update because settings can change.

What a guest network does not solve​

It does not secure a compromised router, patch a smart device or prevent a guest from visiting a phishing site. Rotate the guest password after a long-term visitor leaves if access should end. The FTC's home Wi-Fi guidance recommends guest access and current encryption; its camera advice explains separating devices. If you have not reviewed the router itself, start with our router checklist.