Selfishnet Windows 10 Jun 2026

This paper is for educational and informational purposes only. The use of Selfishnet to interfere with networks you do not own or have explicit permission to manage is illegal and unethical.

Selfishnet is a lightweight, portable network management tool designed for Windows users who need to control or limit bandwidth usage across a local area network (LAN) without requiring router administrative access. While it is an older utility, it remains a popular "quick fix" for home or office environments where one device may be "hogging" the internet connection. selfishnet windows 10

At its core, SelfishNet is a free ARP (Address Resolution Protocol) spoofing tool. Unlike complex enterprise solutions like QoS (Quality of Service) routers, SelfishNet operates directly from a single PC on the network. Its primary goal is deceptively simple: to cut off the internet connection of any selected device on your local Wi-Fi or Ethernet network, thereby making the connection "selfish" for the host machine. It achieves this by sending forged ARP packets to the target device and the router, convincing the router that the target device's IP address corresponds to the MAC address of the host PC. This effectively creates a man-in-the-middle (MITM) state, but instead of intercepting data, SelfishNet simply drops the packets, killing the target’s access. This paper is for educational and informational purposes

Under the tab, check "Run this program as an administrator" . Launch and Configure : While it is an older utility, it remains

: Ensure this is enabled in your "Windows Features" settings; otherwise, the app may not open. Compatibility Settings : Right-click the SelfishNet.exe file and select Properties .

SelfishNet is a powerful, free tool for Windows 10 that allows you to manage and limit the internet speed of every device connected to your network—without needing access to your router's admin page. It works by using , effectively telling other devices on your network that your PC is the gateway, giving you control over their bandwidth. Key Features

SelfishNet on Windows 10 is a testament to "abandonware" resilience. While it can function, the process is a hacky journey through disabling secure boot, wrestling with driver signatures, and fighting Windows Defender. For the home user trying to stop their roommate’s Netflix binging or a child’s late-night gaming, it works—when it works. However, the modern security posture of Windows 10 is inherently hostile to SelfishNet’s core methodology. Ultimately, while the tool is an excellent educational example of how fragile ARP is, users are strongly advised to invest in a router with proper bandwidth management rather than relying on this aging, dangerous, yet oddly effective piece of software.