Selfishnet — V3 |best|

, Selfishnet V3 is a marvel of open-source networking. It demonstrates how easily the TCP/IP stack can be subverted using ARP poisoning. For penetration testers and security students, it is an excellent educational tool to understand man-in-the-middle attacks.

Despite its somewhat controversial nature, the tool remains relevant because it's completely software-based—no extra hardware or advanced network configuration is needed. It runs on your existing Windows PC and uses a low-level network protocol to intercept and control traffic flowing to and from your router.

Here is the step-by-step mechanics:

At its core, the application is designed for a single purpose: to allow one user on a network to limit or restrict the internet bandwidth of all other connected devices. Originally released years ago and still recognized for its raw effectiveness, SelfishNet V3 continues to be discussed in online forums for its ability to prioritize a user's connection without needing special router access. Selfishnet V3

If you need bandwidth, talk to your network administrator, upgrade your internet plan, or set proper QoS rules. Selfishnet V3 is the nuclear option—powerful, effective, but ultimately harmful to the network ecosystem.

While Selfishnet itself is generally safe to use, downloading it from unverified sources can lead to malware infections. Always download Selfishnet V3 from reputable tech forums or the developer's official channels.

Completely cut off internet access for a specific device with a single click. , Selfishnet V3 is a marvel of open-source networking

Development on Selfishnet V3 has slowed down significantly since 2019. Why? Two main reasons:

If you need help setting up your router's native Quality of Service (QoS) features instead, or have questions about protecting your home network, please let me know. Releases · nov0caina/SelfishNet - GitHub

: Lists all devices (PCs, phones, tablets) currently connected to your network by their IP and MAC addresses. Despite its somewhat controversial nature, the tool remains

Open the app and select your active network adapter (e.g., your Wi-Fi or Ethernet card) from the dropdown menu.

While Selfishnet V3 is a useful tool, it should be used responsibly.

Displays the exact, real-time download and upload speeds currently being consumed by each device.

Because it uses ARP Spoofing—a technique also used in malicious attacks—many antivirus programs may flag it as a "threat" or "potentially unwanted program".