Lanbench

It can be used to stress-test network links to check for overheating hardware or unstable connections that drop under heavy load.

While designed for LANs, it is frequently used to test Wi-Fi performance under controlled conditions. By moving a laptop around a building and running LANBench against a wired server, administrators can map out wireless dead zones based on throughput degradation. LANBench

The original LANBench was written for Windows using WinSock2. Modern versions for Linux often use POSIX sockets and epoll. It can be used to stress-test network links

Example build on Linux (from source):

git clone https://github.com/mstasiak/LANBench.git   # example fork
cd LANBench
make
sudo make install

Windows: Precompiled binaries are available on some tech forums, or compile with Visual Studio using the provided .sln file. Windows : Precompiled binaries are available on some