In shared living environments—such as university dormitories, shared apartments, or open-plan offices—a single user engaging in high-bandwidth activities (like 4K streaming, large game downloads, or video conferencing) can cripple the latency for everyone else. Standard router configurations are often inaccessible to tenants or require administrator passwords. Selfishnet v3.0.0 democratizes network control by exploiting how standard, unsecured networks handle Address Resolution Protocol (ARP). By sending ARP replies to the gateway, Selfishnet convinces the router that the user’s computer is the legitimate path for all traffic. Once this "Man-in-the-Middle" (MITM) position is established, the software acts as a gatekeeper, throttling or blocking competing devices.
A technical report for SelfishNet v3.0.0 on Windows covers its functionality as a network management tool designed to control bandwidth and manage connected devices. 1. Software Overview
Check the box in the Block column to restrict all external internet access for that specific device. Step 7: Start the Spoofing Process selfishnet v3.0.0 windows
The main SelfishNet interface will appear, but it will initially be blank. Your first task is to populate the list. Click the Network Discovery icon at the top left of the interface. This icon looks like a globe. You may need to click it once or several times to allow SelfishNet enough time to scan the network and display all connected devices. After a few seconds, a list of every device on your network will appear, showing their IP addresses, MAC addresses, and live upload/download rates.
Once the main graphical user interface (GUI) opens, you will notice that the device list is empty. By sending ARP replies to the gateway, Selfishnet
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Click the Flash/Start button (yellow lightning bolt or play icon) in the toolbar. SelfishNet will begin redirecting traffic. You will instantly see the Download (KB/s) and Upload (KB/s) columns update, showing exactly how much bandwidth each IP address is consuming. Since WinPcap is no longer maintained
It typically requires WinPcap to function. Since WinPcap is no longer maintained, many users must use Npcap in "WinPcap compatibility mode" to get it working on Windows 10 or 11.
Operates entirely from your Windows PC. You do not need the administrator password to the network router to use it.