is a lightweight, free Windows network management tool designed to discover local devices and actively control their bandwidth allocation. By utilizing ARP spoofing technology, this software allows users to throttle, cap, or entirely block internet access for specific devices on a shared Wi-Fi or LAN connection without accessing the router’s administration panel.
Functions entirely from the desktop environment; there is no need to log into a router’s gateway IP address or change physical wiring. Technical Architecture & Prerequisites
Because Selfishnet V3 relies on ARP spoofing, it also opens your own PC to security vulnerabilities. Malware on your network can hijack the MITM position. Furthermore, if you run the tool on a public Wi-Fi (e.g., a coffee shop or library), you are effectively performing an illegal wiretapping operation.
: The application is written in C and is a "tiny utility," meaning it consumes very few system resources while running in the background. Selfishnet V3
The Ultimate Guide to Selfishnet V3: Take Control of Your Local Network Bandwidth
The official Selfishnet V3 GitHub repository lists the current supported features:
Using Selfishnet V3 against another person’s device constitutes a localized DoS attack. In many countries, this violates computer fraud and abuse laws. For example, under the UK’s Computer Misuse Act 1990 or the US CFAA, unauthorized impairment of a computer's operation is a felony. is a lightweight, free Windows network management tool
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The "V3" generally refers to a third version or a refined, more stable version of the original Selfishnet software, aimed at supporting newer Windows environments (7, 8, 10, and sometimes 11). It is particularly favored by users who need to:
: Allows users to manually set download and upload speed limits for any device connected to the same Ethernet or Wi-Fi network. Device Management : The application is written in C and
Selfishnet operates using a technique known as (or ARP Poisoning).
If Selfishnet does not work for your system, consider these alternatives: Selfishnet alternative for ubuntu - internet
Development on Selfishnet V3 has slowed down significantly since 2019. Why? Two main reasons:
Using this tool is often considered selfish, as it disrupts the internet service of others without their consent.
: While a Virtual Private Network won't stop Selfishnet from throttling your overall bandwidth limit, it does encrypt your data traffic, preventing the attacker from seeing what specific sites you are visiting while routing through them. how to detect ARP spoofing on your specific operating system, or should we look into legitimate router Quality of Service (QoS) settings to manage bandwidth fairly? Selfishnet V3