Blocking Wifi Signal

It’s 2017 and more than half of the world’s population are the internet now. Apart from being connected to mobile networks or public WiFi hotspots, the next available source of internet (in most cases) is the home WiFi network. But it just doesn’t end there.

To block a network, run the following command, replacing “WIFI NAME” with the name (SSID) of the wireless network. This is just the Wi-Fi network name that appears in the standard Wi-Fi popup menu. Netsh wlan add filter permission=block ssid=' WIFI NAME ' networktype=infrastructure.

You have leeching neighbors and YouTube addicted roommates to handle as well. Imagine, you wake up one day to find that the internet pack has been drained dry. Man, that would be a nightmare.

Not to worry, we at Guiding Tech, have a neat and easy solution on how to block devices from your home WiFi network.

We will be exploring two methods to control the home WiFi system. The first is through MAC address filtering and the latter is through a third-party app on your Android phone. So, let’s begin.

  • Jamming is sending disrupting signals of your own in order to block a WiFi signal. Although it works, it is against the law in many countries and it could lead to fines and other issues.
  • You will find that the method of blocking Wi-Fi signals in a room is very similar to how you would do this outside of your home. The key is using metal to block off these harmful waves. You can certainly use Mylar blankets as a means of blocking Wi-Fi from getting into the room.
See Also:Common WiFi Problems and SolutionsWhat can block wifi signals

1. MAC Address Filtering in PC

Media Access Control or in simple terms, MAC Address are unique addresses assigned to a system by its manufacturer. Unlike IP Address, the MAC address of a system remains same throughout and doesn’t change. First, you’d need to obtain the MAC addresses of all the connected devices.

1. Scan Network

Wireless Network Watcher is a nifty app which can help you in scanning the devices connected to your WiFi. All you need to do is download the app and run the scan.

The scan which roughly takes only a couple of seconds to complete lists all the connected devices. Once done, double click on the trespassing MAC address and copy it to a clipboard.

2. Block MAC

Blocking Wifi Signal

Now that the MAC addresses have been noted, login to the router’s admin page, head over to the Wireless section. and select Wireless MAC Filter.

Once inside the page, choose Reject and match the MAC address against the one you have noted. Click on Apply and you are all set, to enjoy a distraction-free WiFi network.

Another alternative is to whitelist only the recognized devices. Select Accept and include only the familiar MAC addresses. Once saved, though the WiFi network will continue to show, no new device will be able to connect to your network.

So, the next time even if your neighbor manages to decipher your WiFi password, the whitelist feature will keep you safe.

If your router homepage doesn’t contain a link to MAC filter, you might find it in the advanced setting.

2. Block Through Android

The second method makes use of a popular app called NetCut. A very popular app for analyzing WiFi connections, it’s catch is that it works only on rooted Android phones.

Metal Blocking Wifi Signal

Once the superuser permission has been granted, NetCut will show all the available devices. Akin to the first method, you’ll need to obtain the MAC addresses first.

Now all you have to do is tap on the chosen address and slide the WiFi bar to zero. The best thing about this app is that the changes occur in real time which means that as soon as you slip the slider down, the connection to the user will cease.

Speaking of rooting Android devices, check out the advantages and disadvantages of it.

Calling It a Wrap!

So, these were some of the methods by which you can offload freeloaders from leeching on your home WiFi network. Given the state of privacy and security these days, it’s imperative that we have a finer control over the WIFi usage. So, which is your favorite method?

See Next: 3 Simple Steps to Turn Off Public WiFi Notifications

The above article may contain affiliate links which help support Guiding Tech. However, it does not affect our editorial integrity. The content remains unbiased and authentic.

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Signal Disturbances and Interference

One important reason to choose newer equipment that supports the 5 GHz frequency band is that the signals on this band have a shorter range and are therefore less likely to create and pick up interference from networks than older equipment using the 2.4 GHz band.

1. Your Neighbor's Network

When many networks are located closely together, for example in apartment buildings, this will affect the wireless capacity. For equipment on the 2.4 GHz band, neighboring networks are the single largest source of interference on the wireless network.

See also:

2. Separate Wireless Networks in Your Own Home

If you have multiple wireless networks in your home that are set up on different pieces of equipment – this can be even more disruptive than your neighbor's network. If you need to have logins for the wireless network with different access levels, we recommend setting up a guest network with its own network name (SSID) on the same router or access point as the primary network.

3. Bluetooth

Blocking Wifi Signal From Neighbor

Wireless devices such as headsets, keyboards, and mice can interfere with the Wi-Fi signals. Bluetooth uses a technology called frequency hopping, which means it skips around the 2.4 GHz band, up to 1600 times per second(!)

When equipment that uses Bluetooth, jumps into the frequency range of equipment that uses Wi-Fi, it can therefore ruin some of the Wi-Fi traffic and create delays. As it jumps so often, actual impact on Wi-Fi will be highly variable, making such scenarios rather hard to troubleshoot.

Worst case, your Wi-Fi access point will automatically change the channel to avoid the interference – a misguided strategy, as Bluetooth will hop through all the channels that are used for Wi-Fi anyway, and this may cause you to lose more Wi-Fi traffic. Old devices and computers in particular will need several seconds to reconnect if the access point changes to a different channel.

4. Baby Monitors, Walkie-Talkies and Other Radios

Do you have baby monitors, walkie talkies, or maybe a radio locator to keep track of your pets or keys? Such equipment tends to use the same frequency as the older Wi-Fi standards 802.11 b/g/n and will therefore interfere with the 2.4 GHz band.

Traditionally, this type of equipment does not use Wi-Fi and uses the entire frequency band without any regard to other communication on the same frequency.

5. Microwave Oven

Microwave ovens use electromagnetic waves of 2.4 GHz to heat food. Unfortunately, the older Wi-Fi standards, 802.11 b/g/n also use electromagnetic waves at 2.4 GHz, but with far weaker transmit power.

Although all microwave ovens are well covered, there will always be some degree of 'leakage' of waves – a slight leak is not dangerous to humans, but:

  • Most microwave ovens are at about 1000 W.
  • Most Wi-Fi access points can transmit a maximum of 0.1 W.

Therefore, it does not take much of a leak for the 2.4 GHz band in the area to become unusable.

Physical Obstacles to the Wi-Fi Signals

Doors Blocking Wifi Signal

With shorter range, equipment on the 5 GHz band is more dependent on the having a clear line of sight between the wireless access point/router and the clients; devices and computers connecting to the network.

Blocking Wifi Signal

Some obstacles are simple to remove, and in some cases you may be able to move the access point away from the obstacles. Building materials in the home are harder to address, however. The solution we recommend to ensure coverage in such cases is a mesh network of several wireless access points that can work their way around the obstacles.

6. Concrete and Masonry Walls

Different building materials block wireless signals to very different degrees. Wi-Fi signals are most weakened by having to go through thick walls, especially reinforced concrete.

See also: Wi-Fi Signal Loss by Building Material.

7. Thick Timber Walls

Regular wooden walls cause some signal loss, but not a great deal, as you can see in Wi-Fi Signal Loss by Building Material. However, timber walls have proved to be a significant obstacle to wireless signals.

8. Metal and Floor Heating

When signals have to reach multiple floors, floor heating can create problems for the wireless signals.

And is your router or other wireless access point placed inside a metal cabinet? Get it out of there if you can!


9. Water

Do you use hydronics for heating in your home? Or do you have a really big aquarium? Here the wireless signals will also struggle to get through.

10. The TV

Perhaps the most common cause of weakened Wi-Fi signals – don't place your router or other wireless access point behind the TV!

Materials Blocking Wifi Signal

Article by Geir Arne Rimala and Jorunn D. Newth