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Title : How Can I Know If Someone Stole My Wifi?
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How Can I Know If Someone Stole My Wifi?

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If you notice a slowdown in Netflix streaming or web browsing, it's possible you have someone from your internet. Although maybe only neighbors are too cheap to buy their own package, you will want to know for certain whether someone stole your wifi and increased your security. This is how you do it.

Dear Lifehacker,
Lately it seems like my high-speed connection is stuck, and I get a scary feeling that someone is stealing my bandwidth on my WiFi network. How can I find out if other people leech my wifi, and how do I stop them if they are?Signed,Paranoid or Not?

PoN dear,Besides the fact that your wifi-moocher might slow down your connection, people who are connected to your network might also have access to some of your shared folders (depending on what security measures you use), and someone might even use your connection to do illegal things. That can cause you some difficulties if, for example, you get an angry letter from your ISP about all the BitTorrenting that you don't.However, don't worry, we can help you find out if someone stole your wifi and help you stop it. (Note: If it turns out that no one is using your wifi, you might want to read our guide to fixing your slow wifi connection.)Without further ado, there are several methods for sniffing wireless intruders.

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Low tech method: Check your wireless router lights

Your wireless router must have an indicator light that shows internet connectivity, default network connection, and also any wireless activity. One way you can see if someone is using your network is to turn off all wireless devices and see if the wireless light is still flashing. The problem with this method is that you might have many other wifi devices (e.g. TV, smartphone or game console) to unplug, and this process does not give you much additional information.This is still a fast and dirty way to confirm your current suspicions. For more details, follow up either by checking the administrative console or the software tool suggestions below.

Network admin method: Check your router device list

Your router's administrative console can help you find out more about your wireless network activities, and this is where you need to go to change your router's security settings. To enter the console, enter your router's IP address into the web browser window. Some routers have a default IP address (assuming you don't change any settings) that you can use to access your admin panel.If not, you can find this address in Windows by entering the command prompt (press Win + R then type cmd) and then typing ipconfig in the window followed by Enter. The number next to "Default Gateway" or "IPv4 Address" is what you are looking for.On a Mac? Open System Preferences> Network. Switch your active connection (indicated by a green dot) and look for a long string of numbers under "Status." You can also click Advanced ...> TCP / ICP and retrieve the number next to "IPv4 Address."Next, type the IP address in the browser window. You will be asked to enter your router. If you haven't changed the default settings, your router's documentation will have login information, which usually uses a combination of "admin" and "password" or blank fields. (Note: for security reasons, you must change your login immediately after logging in to your router's console so the hacker cannot do it for you.)

Device attached

All routers are different, but once you are in your possession, you want to look for sections related to connected devices (Device Managers, Connected Devices, My Network, etc.). This should provide a list of IP addresses, MAC addresses, and device names (if detected) that you can search for. Compare devices that are connected with your equipment to find unwanted users.Note: A The DHCP list on the router does not display all installed devices, only DHCP clients - devices that get their IP address automatically from the router. However, hidden hackers can enter your network with a static IP address, bypassing the DHCP table. So, you should refer to the actual wireless client list, not the DHCP list. On the Linksys router, for example, you can find it behind the wireless MAC address filter function, which needs to be activated so that you can display the MAC list of all connected devices (static or DHCP).

What to do if you find an invalid device

As mentioned below, ensuring your wireless security using WPA2 encryption (and setting up a new password) will prevent unauthorized users from accessing your wifi network (and start anyone on your network until they provide a new security key). IP address and MAC address alone will not really help you identify the culprit.

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Detective method: Use a network monitoring software tool

It is good to know how to enter your network admin panel, but maybe you also want a more sophisticated network audit or sleuthing. That's where MoocherHunter entered. Part of free OSWA (Organizational Systems Wireless Auditor) - a robust wireless audit toolkit, MoocherHunter has been used by law enforcement organizations to track wifi leechers. The software description says it can determine the location of wireless hackers from the traffic they send across the network, up to two meters accuracy.Software cannot be run as executable on Windows; rather it needs to be burned to a CD, then used to boot the computer. The idea is that you will walk around and use your laptop (and directional antenna on your wireless card) to track the physical location of the WiFi Moocher.We do not recommend that you use this tool to take concrete actions (such as knocking on your neighbor's door and conducting physical confrontations) based on software results, but this is another way to learn more about who, if anyone, might use your wireless network.If you have a new router or those that depend on mesh network settings (such as Eero, Google, or Luma routers) You should do a quick search in the application store of your choice to see if there is a suitable network management application.Even though your router might not debut with partner applications, companies like Asus, D-Link, Netgear, and Linksys all have network management applications designed to make controlling your wireless network easier than finding your router's IP address and login information. This router application will show you what devices are connected to your network, which are monopolizing bandwidth, and scan for potential problems (such as unwanted guests on your network). You can even run firmware updates from several applications, helping to maintain the security of your network.

Move forward: Increase your wifi security

You did not specify the type of wireless security your network uses. Old-fashioned security protocols such as WEP and WPA must be avoided, because they are quite insecure. If you are using a more modern WPA2, make sure you are using WPA2-AES and not a less reliable WPA2-TKIP.If your connection not protected with strong passwords and modern encryption schemes, your wifi is very vulnerable to anyone looking for a free ride. (If you are not sure what type of encryption your network is using, open your wireless connection properties, which must identify the type of security.)If you have gone through all the steps, you cannot identify wifi leechers, and your browsing still seems slow, you might want to change your mind to other options to speed up your internet.
This is to find out everyone who is connected to you ...
Love,LifehackerThis article originally appeared in January 2011, and was updated with new information in August 2017, and again in October 2019.

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