With great power comes great responsibility. SelfishNet V3.0.0 is a for your network. Using it maliciously is wiretapping. Using it defensively on your own private network is shrewd.
Safety, ethics, and cautions
: Set specific caps on the download and upload speeds of individual devices. Block Access selfishnet v3.0.0 windows
SelfishNet v3.0.0 is a rare breed of software: an old-school networking tool that has been revived for the modern era. It provides a powerful, lightweight, and highly effective method for taking control of your local Wi-Fi or Ethernet network. With its ability to instantly discover all connected devices, limit their bandwidth, or block them outright, it puts the kind of power that was once reserved for network administrators into the hands of everyday Windows users.
SelfishNet operates by exploiting the Address Resolution Protocol (ARP). It sends unsolicited ARP messages to the network, convincing other devices that the host machine is the default router/gateway. With great power comes great responsibility
SelfishNet V3.0.0 is a powerful double-edged sword. It showcases how fragile the classic Ethernet model is—anyone on your local network can, with minimal effort, intercept or block your traffic. The best defense against SelfishNet is not a better firewall, but like Dynamic ARP Inspection (DAI) on managed switches, port security, or using encrypted VPNs for all sensitive traffic.
Obtain the SelfishNet v3.0.1 Installer (or latest v3) from GitHub . Using it defensively on your own private network is shrewd
Once the network scan is complete, you will see a table with columns: , MAC Address , Hostname , and Status .
: Reinstall WinPcap or install Npcap with "WinPcap compatibility mode" enabled. Ensure you run SelfishNet as an administrator. The program freezes or crashes on launch
Click the button (the red X or stop icon) in the top toolbar. This ceases the ARP spoofing process.
The "v3.0.0" designation typically refers to the version packaged with specific driver dependencies required for modern Windows builds (specifically Windows 10 and 11).