How to Block Someone From Using Your Wi-Fi Network

Few things are more annoying than paying for broadband and watching someone else use it for free. Maybe you shared your Wi-Fi password with a neighbour during their house move and they never stopped using it. Maybe a former housemate still connects every evening, or your teenager has quietly handed the password to half the street. Whatever the story, the slow speeds and the security risk are now your problem, and it is time to take the network back.

The good news is that you do not need to confront anyone or buy new equipment. Every home router gives you several ways to remove a person and keep them out, from the simple and decisive to the targeted and quiet. This guide walks through each method in order, explains what each one actually does, and helps you choose the right level of response for your situation.

First, Confirm Who Is Actually Connected

Do not start blocking devices at random. A MAC address looks anonymous, and it is surprisingly easy to block your own smart TV or your partner’s work laptop and create a much bigger problem than the one you were solving.

Log in to your router’s admin page by typing 192.168.0.1 or 192.168.1.1 into a browser, sign in with the admin details from the sticker on the router if you have never changed them, and open the connected devices list. It may be called Attached Devices, DHCP Clients List, Clients, or simply Devices depending on the brand. Note the name, IP address, and MAC address of the device you believe does not belong. If you are unsure how to identify it, work through the identification steps in our guide on checking which devices are connected to your Wi-Fi before you block anything.

A quick test helps: if the suspect device is a neighbour, its connection will usually stay active at times when nobody in your house is using anything, and its hostname often gives it away, such as a phone model you do not own.

Method 1: Change the Wi-Fi Password (The Decisive Fix)

Changing the password is the only method that is guaranteed to work against everyone at once, including people whose devices you have not spotted yet. The moment you save a new password, every device is disconnected, and only those given the new password can reconnect.

1. Log in to the admin page at 192.168.0.1, 192.168.1.1, or the address shown as Default Gateway on your computer.
2. Open Wireless or Wi-Fi Settings. On dual-band routers there are separate sections for 2.4GHz and 5GHz; change both, or use the same new password for both bands.
3. Check the security mode. Set it to WPA2-PSK, WPA3, or WPA2/WPA3 mixed mode. Never leave it on WEP or Open, which offer almost no protection. Microsoft’s guidance on securing a home network in Windows and at the router covers why modern encryption matters.
4. Enter a long new password. Use at least 12 to 16 characters, ideally a passphrase of several random words plus numbers. Avoid names, birthdays, and your address.
5. Save and restart if prompted. Then reconnect your own phones, laptops, TVs, and smart devices with the new password.

The downside is the reconnecting work afterwards, especially if you own many smart bulbs and plugs. But if a password has been shared widely or you suspect it has leaked beyond one person, this is the only clean start.

Method 2: Block the Device by MAC Address

If you know exactly which device is the problem and you do not want to disturb everyone else, MAC filtering lets you block that one device while the rest of the household carries on as normal.

1. Copy the device’s MAC address from the connected devices list, for example 8C:3B:AD:42:19:77.
2. Find MAC Filtering or Access Control. On TP-Link routers it is usually under Advanced, Security, Access Control, or Wireless, MAC Filtering. On Netgear it appears under Advanced, Security, Access Control. On ASUS, look for Wireless, Wireless MAC Filter.
3. Choose the block mode. Select Deny, Blacklist, or Block devices in the list. Be careful: many routers also offer an Allow mode, which flips the logic and blocks everything except the listed devices. Picking the wrong one can lock out your whole house.
4. Add the MAC address, give it a recognisable description like blocked neighbour phone, save, and apply.
5. Restart the router if the device still appears connected, because some models only enforce the rule on a fresh connection attempt.

Understand the limit of this method. As this explanation of MAC filtering and its weaknesses makes clear, a MAC address can be copied or randomised, and modern phones routinely use private randomised addresses. MAC filtering is a useful gate against a casual freeloader, not a wall against a determined technical attacker. Use it as a targeted tool, and pair it with a strong password for real security.

Method 3: Use the Router App to Pause or Block

If your router or mesh system has a phone app, such as TP-Link Tether or Deco, Netgear Nighthawk or Orbi, or Google Home for Nest Wifi, blocking is often just a couple of taps. Open the client list, tap the unwanted device, and choose Block, Deny Access, or Pause. Some apps also let you create profiles for each family member and pause all of their devices together, which is ideal for managing children without touching anyone else’s connection.

App blocking usually works by applying the same MAC-based access control behind the scenes, so the same limitations apply. Its real advantage is convenience: you can act the moment you spot the device, from the sofa, without opening a laptop.

Method 4: Stop It Happening Again

Removing today’s freeloader is only half the job. A few settings stop the problem quietly returning:

• Create a guest network for visitors. Almost every modern router offers one under Guest Network in the wireless settings. Visitors get internet access on a separate name with its own password, which you can change freely without reconnecting all your own devices.
• Disable WPS. The push-button and PIN system under Wireless, WPS is convenient but the PIN method is weak and well known to attackers. Turn it off.
• Change the admin password. If it is still the default from the sticker, anyone connected could log in and simply unblock themselves. Set a unique admin password under System Tools or Administration.
• Update the firmware. Check the manufacturer’s support pages or the update button in the admin panel and install the latest version to close known security holes.
• Turn on new-device notifications if your app supports them, so the next stranger announces themselves immediately.

Common Mistakes and Useful Tips

• Blocking in Allow mode by accident. Always read the filtering mode twice before saving. If you lock yourself out, connect by Ethernet cable or reset the router and start again.
• Blocking a randomised address and thinking the job is done. A phone with MAC randomisation may reappear with a fresh address. If blocking fails twice, change the password instead.
• Using a weak new password. Replacing one shared password with your pet’s name solves nothing. Length beats cleverness every time.
• Forgetting the 5GHz band. Change the password and check the filtering rules on both bands, or the blocked person may simply reconnect on the other one.
• Leaving the old password on a guest network. Check every network name your router broadcasts, not just the main one.

Conclusion

Blocking someone from your Wi-Fi is mostly about choosing the right tool. Change the password when the problem is widespread or unknown; it is decisive and resets everything in one move. Use MAC filtering or your router app when the problem is one known device and you want a quiet, targeted fix. Then protect the result with a guest network for visitors, WPS switched off, a proper admin password, and up-to-date firmware. Do that once, properly, and your broadband stays fast, private, and yours.

Frequently Asked Questions

Will blocking someone tell them they have been blocked?

No notification is sent. Their device will simply fail to connect, or show saved but unavailable. If you change the password, they will see an authentication error, which most people interpret as the password having changed.

Can a blocked person get back in?

With MAC filtering alone, a technical user could change or randomise their MAC address and try again, which is why a strong, unshared password is the real protection. With a new WPA2 or WPA3 password they do not know, they cannot reconnect.

What if I accidentally block my own device?

Log back in to the admin page from another device or a wired connection, open the same MAC filtering or access control list, and delete your device’s entry. If you are fully locked out wirelessly, an Ethernet cable always works.

Is it legal to block someone from my own Wi-Fi?

Yes. It is your broadband connection and your router, and you are free to decide who uses it. Blocking a device does not damage it or access its data; it simply refuses it entry to your network.

Should I hide my network name as well?

Hiding the SSID adds almost no security and makes your own devices work harder to find the network. A strong password and modern encryption protect you far better, so leave the name visible and invest your effort there.