Selfishnet V3 is a popular tool used for local network management, primarily known for its ability to control and limit bandwidth usage for other devices connected to the same Wi-Fi network. How it Works

The software uses a technique known as ARP spoofing (or ARP cache poisoning).

The Trick: It sends fake "Address Resolution Protocol" messages to the router and other devices on the LAN.

The Result: It convinces every device on the network that your computer is the gateway (the router).

The Control: Because all internet traffic from other devices is routed through your machine first, you can choose to "choke" their speed or cut them off entirely. Key Features of V3

Device Discovery: Lists all devices (PCs, phones, tablets) currently connected to your network by their IP and MAC addresses.

Bandwidth Limiting: Allows you to set specific upload and download limits for any individual device.

Block Access: Includes a "Block" button to completely disconnect a specific user from the internet while keeping them on the Wi-Fi.

Compatibility: While older versions were designed for Windows XP/7, newer releases like V3.0.1 (often found on repositories like GitHub) are designed to work on Windows 10 and 11, provided they are run with administrator privileges. Important Considerations

Legality and Ethics: Using this tool on networks you do not own (like public Wi-Fi or a neighbor's network) can be illegal or against service terms.

Security Risk: Modern security software or advanced routers with "ARP Inspection" can often detect and block this behavior.

Requirements: It typically requires WinPcap or Npcap to be installed to capture and inject network packets. Releases · abelmez/SelfishNet - GitHub

Conclusion

SelfishNet v3 packages powerful network-monitoring and traffic-control features into an accessible GUI, useful for diagnostics and management on networks you control. However, because it relies on interception techniques like ARP spoofing, it carries significant ethical, legal, and stability risks when used without explicit authorization. Prefer router-based or enterprise-grade controls for routine bandwidth management, and restrict SelfishNet-style tools to controlled, consented environments or testing labs.

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SelfishNet V3 is a small but powerful network management utility designed to give users control over their local network bandwidth. Originally a legacy tool, it has seen modern updates (v3) to improve compatibility with newer operating systems like Windows 10 and 11. Quick Verdict

SelfishNet remains a "cult classic" for users who need a lightweight, no-frills way to limit or block internet access for other devices on their Wi-Fi. While it is highly effective for simple home networks, its aging architecture and reliance on older drivers make it a bit finicky to set up. Key Features Device Discovery:

Instantly scans your network to list all connected devices by IP and MAC address. Bandwidth Limiting:

Allows you to set specific "DownCap" (Download) and "UpCap" (Upload) limits for individual devices. One-Click Blocking:

A "Block" checkbox completely cuts off a device's internet access while keeping them connected to the router. Lightweight UI:

No installation required (portable) and a very small file size. The Good: Why Use It? Simplicity:

Unlike complex professional tools, SelfishNet has a very short learning curve. You just select your network adapter, scan, and start limiting. Direct Control:

It is perfect for situations where one person is "hogging" the bandwidth (e.g., large downloads or 4K streaming), allowing you to prioritize your own connection. No Router Access Needed:

It uses ARP spoofing to control traffic from your PC, meaning you don't need the admin password for the router to manage the network. The Bad: Known Drawbacks Stability Issues:

Users frequently report "Not Responding" errors or the window disappearing when minimized. Dependency on WinPcap: It requires the WinPcap driver

to function. Since WinPcap is no longer officially maintained, it can cause compatibility headaches on the latest Windows updates. False Positives:

Because it uses ARP spoofing (a technique also used by hackers), many antivirus programs will flag it as a "Trojan" or "Malware." You will likely need to add an exception to your security software. Hardware Limits:

It does not work with all Wi-Fi chipsets; your card must support "Monitor Mode" or be compatible with the driver's packet injection. Summary Table Ease of Use ⭐⭐⭐⭐ Very intuitive interface. Effectiveness ⭐⭐⭐⭐⭐ Works instantly once configured correctly. Compatibility

Often requires "Run as Administrator" and Windows 7 compatibility mode. Use with caution; download only from trusted sources like Recommendation If you are looking for a free, quick fix

to stop a roommate or family member from slowing down your gaming or work session, SelfishNet V3

is excellent. However, for a more stable and modern experience, you might consider alternatives like

or simply using the "Quality of Service" (QoS) settings built into most modern routers. If you'd like to try it, let me know: version of Windows are you running? Are you getting a specific error (like "Driver not found")? or just a temporary fix?

Control your internet bandwidth with SelfishNet v3. - GitHub

Key Features of Selfishnet V3

Users who champion Selfishnet V3 highlight several specific features that set it apart from generic network limiters:

• Real-time Bandwidth Graphs: Visualize exactly how much bandwidth each device is consuming at any given moment.
• Per-Device Throttling: Limit specific IPs or MAC addresses without affecting other devices.
• Connection Killing: Permanently block a device from accessing the internet entirely (de-auth attacks).
• Lag Injection: Increase latency (ping) rather than just reducing speed, making online gaming impossible for the target.
• MAC Spoofing Protection: Advanced versions bypass routers that use MAC filtering or static ARP tables.
• Lightweight Design: Runs efficiently on Raspberry Pi, old laptops, or virtual machines, requiring minimal system resources.

Controlling Network Traffic

1. Create rules to control and prioritize network traffic.
2. Apply the rules to the network interface.

3. Ethernet Over Wi-Fi

If you are a gamer, nothing beats a wired connection. Ethernet cables provide stable latency (ping) regardless of Wi-Fi congestion caused by Selfishnet V3 or other interference.

Basic Configuration

1. Launch Selfishnet V3 and select the network interface to manage.
2. Configure the IP address range for your local network.
3. Set the upload and download bandwidth limits for your network.

Features

• Traffic Control: Control and prioritize network traffic based on IP addresses, ports, and protocols.
• Traffic Shaping: Limit the bandwidth usage of specific devices or applications to prevent network congestion.
• Traffic Blocking: Block unwanted traffic from specific IP addresses, ports, or protocols.
• Quality of Service (QoS): Ensure a smooth online experience by prioritizing critical applications such as video streaming, online gaming, or VoIP.