netregu

WinDivert-based per-process network bandwidth limiter for Windows

netregu is a simple CLI tool that allows you to limit the network bandwidth of specific processes on your Windows machine.

How to build

• Get CMake
  • Install it (select the option to add it to the system PATH)
• Get WinDivert
  • Download the latest release and extract it
  • Copy include/windivert.h to netregu/include/
  • Copy x64/WinDivert.lib to netregu/lib/
• Get CLI11
  • Download the latest CLI11.hpp file and copy it to netregu/include/
• Build the app
  • Open a terminal and cd into the netregu folder
  • Run cmake --preset=x64-release -B build/x64-release && cmake --build build/x64-release --config Release to build the app
• Go back to the extracted WinDivert folder
  • Copy x64/WinDivert.dll to netregu/build/x64-release/Release/
  • Copy x64/WinDivert64.sys to netregu/build/x64-release/Release/

How to use

• Run the app using a terminal with administrator privileges (required for WinDivert)
• Use command line options to specify which processes to limit and the desired bandwidth limits (netregu --help for details)

Known issues

• The app can introduce some latency to network traffic due to packet processing
• Some connections are not directly detected and the responsible process will be unknown until that connection is closed and reopened (for example by restarting the application/download or reloading the browser tab)
• The app may not work correctly with other applications that modify network traffic