How to Set Up a Guest Wi-Fi Network for Your Office or Shop

If customers, visitors or contractors ask for your Wi-Fi password, the safest answer is a separate guest network. It gives people internet access without letting their devices anywhere near your office computers, printers, cameras or point-of-sale terminals. This guide is for small business owners, shop managers and anyone who looks after a home or office router.

Key takeaways

• A guest network keeps visitors’ devices away from your trusted devices, which the US National Security Agency recommends as a basic network protection.
• Most modern routers can create one in a few minutes from the router’s web page or app.
• Use WPA2 or WPA3 security and a strong password, even for guests.
• Keep the router itself updated, and switch off remote administration and UPnP if you do not need them.

Why a guest network matters

When everyone shares one Wi-Fi network, a visitor’s infected phone or laptop sits on the same network as your accounts computer and shared folders. Malware can scan that network and try to reach other devices. The NSA’s guidance on securing home networks, which applies just as well to small offices, advises creating a separate guest Wi-Fi network so visitors cannot reach trusted devices, and at a minimum separating your main Wi-Fi, guest Wi-Fi and smart devices such as cameras and smart TVs.

It also makes life easier. You can change the guest password regularly without reconnecting every staff device, and you never have to reveal the password that protects your business systems.

Before you start

• A computer or phone connected to your router’s main network (by cable or Wi-Fi).
• The router’s admin login details. These are often on a sticker on the router, or were set when it was installed. If your internet provider manages the router, you may need to ask them.
• A note of the guest network name and a new strong password you plan to use.

Step-by-step: TP-Link routers

1. Log in to the router’s web management page from a browser.
2. Go to Advanced > Guest Network and find the Wireless section.
3. Tick Enable Guest Network for the band you want: 2.4GHz, 5GHz or both.
4. Enter a guest network name (SSID). Leave Hide SSID unticked so guests can see the network.
5. Set Security to WPA/WPA2 Personal (or a WPA3 option if your router offers it), keep the default version and encryption, and enter a strong password.
6. Click Save. You can review the guest network later under Advanced > Status.

Prefer your phone? Connect to the main Wi-Fi, open the TP-Link Tether app, tap your router under My Devices, sign in, then tap Guest Network (or More > Guest Network).

Step-by-step: NETGEAR routers

1. While connected to your network, open a browser and go to routerlogin.net.
2. Sign in with the user name admin and the password you set up. Both are case-sensitive.
3. Select Guest Network (on Nighthawk Pro Gaming models, Settings > Guest Network).
4. Scroll to the 2.4 GHz or 5 GHz section and keep Enable SSID Broadcast ticked.
5. Replace the default name, such as “NETGEAR-Guest”, with your own guest network name.
6. Choose a security option (WPA2 is the default), set a password, and click Apply.

NETGEAR says devices on the guest network and the main network cannot reach each other. Other brands, including routers supplied by internet providers, usually have a similar Guest Network or Guest Wi-Fi page; check the manual from the maker’s website if the menu names differ.

Settings worth checking

• Local network access: some routers have an option that lets guests reach your local network. Make sure it is switched off.
• Bandwidth limits: if offered, cap guest speed so visitors do not slow down your card machines or video calls.
• Schedules: on routers that support it, turn guest Wi-Fi off outside business hours.

Lock down the router itself

A guest network only helps if the router is secure. The NSA recommends:

• Use WPA3 where possible, or WPA2/WPA3 mixed mode if older devices cannot connect, with a long passphrase. NSA suggests at least 20 characters for the main network.
• Do not rely on hiding the network name. It adds no real security and can cause connection problems.
• Keep firmware updated, ideally with automatic updates turned on, and replace routers that no longer receive updates.
• Turn off remote administration so the router can only be managed from inside your network.
• Disable UPnP unless a specific device needs it, because it can open holes an attacker could use.
• Reboot the router regularly; the NSA suggests weekly, to clear out some types of malicious code.

Troubleshooting

• Guests can connect but have no internet: restart the router and check that the guest network is enabled on the band they are using.
• The Guest Network menu is missing: update the router firmware, or check whether your provider has locked the settings. A small business router you control may be worth the investment.
• An older device will not connect: try WPA2/WPA3 mixed mode or the 2.4GHz band.
• Staff devices keep joining the guest network: “forget” the guest network on those devices and reconnect them to the main network.

Quick checklist

• Guest network created with WPA2 or WPA3 and its own strong password.
• Guest access to the local network switched off.
• Router admin password changed from any default and stored safely.
• Firmware updated; remote administration and UPnP off.
• Cameras and smart devices kept off the main business network where possible.
• Guest password changed regularly, for example every month or after staff changes.

Next steps

Set aside 20 minutes this week to create the guest network, print the guest password on a small card for your counter, and remove visitors’ devices from your main Wi-Fi. It is one of the cheapest security upgrades a small business can make.

Sources

• TP-Link: How to set up the guest network
• NETGEAR: How do I set up a guest network?
• NSA: Best Practices for Securing Your Home Network