Have you ever had the suspicion that the next door neighbor the wifi is stealing from you? Is your network going too slow at certain times of the day and you are not sure why? A good way to make sure that our connection is not being slowed down by "external agents" is to map our home network.
In this way, if we have identified all the home devices that connect to the Internet we can create a white list of security. Thus, only mobiles, computers and gadgets belonging to said "white list" will have permission to establish a connection, leaving out any type of intruder or unauthorized access.
Step # 1 – Access the router configuration settings
The first step will be to enter the router configuration menu, which is where we will make all the necessary steps. Access to the router is done from the web browser and usually it is usually enough to write the IP in the address bar (you can see the IP of your router next to the user and access password on a sticker that usually comes attached on the router itself ). Usually the router's IP is usually http://192.168.0.1 or http://192.168.1.1.
Once we are inside, we must locate the panel that refers to access control. Its location usually varies from one router model to another, although it is usually among the “Security"
Here we can also see a list with the IPs of all devices that are currently connected to our wifi. So by boat it is soon impossible to know if all these devices are ours or there is some intruder sucking from the jar, although this is a doubt that we will solve quickly.
Step # 2 – Disconnect all wireless devices from the network
Next we will proceed to change the Wi-Fi password. This will make connection of all devices cut off that until now were connected to the network (except for those that are connected via ethernet via a network cable, such as the home desktop computer). Of course, this change will also cause the wifi thief to lose his connection and cannot reconnect.
Step # 3 – Reconnect the devices to the Wi-Fi one by one
Then we will connect to the network one by one all the mobiles and other devices that we have at home using the new password. With the router administration panel in front, we will take note of the MAC address of each of the devices that are connected to the network.
Important: we will not add a new device to the network until we have noted the MAC of the previous device (if it is not impossible to know which MAC corresponds to each device).
Step # 4 – Create a white access list
Now is when the magic begins. Having in front of the list of MAC addresses that we have just collected, we will go to the router administration panel, to the section of “Security -> Access Control"And we will activate the option of"White list"
Next, we will be adding one by one all our devices to the white list, indicating the corresponding MAC address in each case. Once all the devices have been added, we save the changes.
This will cause that from this moment, only the computers whose MAC is added to the white list can connect to the home Wi-Fi network, leaving out all the intruders and chupawifis of the neighborhood. This is a tactic that gives us great security, because although the thieves of Wi-Fi can hack the access password they will not be able to enter because they are not added to the white list.
* To perform this tutorial we have used a TP-Link router. Depending on our router, the menus may be slightly different.
** This trick does not prevent us from hacking the router at any given time. To prevent the piratilla from adding its devices to the white list (it is not common but to pass, it could happen) it is advisable to review this list and change the router access password that is usually factory set.