SelfishNet is a free, third-party network management tool used to monitor and control internet bandwidth for devices on a local Wi-Fi or Ethernet network. It is widely used by individuals to prevent others from "hogging" bandwidth by manually limiting their upload and download speeds or blocking them entirely. Core Functionality SelfishNet works through a technique called ARP poisoning (or ARP spoofing). How it works
Router-Based QoS
: Accessing the router's settings (typically via 192.168.1.1 ) allows for legitimate bandwidth prioritization that is stable and transparent.