Primarily a network stress test program, you can push your router to its knees.
This is the continuation, or port to python 3.9, of BAT-DDoS-Nzen2, which is archived here:
https://github.com/Gteditor99/BAT-DDOS-Nzen2 (RIP)
Just in case, I'm not responsible for any damages caused by the user. DDoS-ing and DoS-ing anyone without their consent IS A CRIME If you do indeed have the former's consent, it's called "Network stress testing"
This program is made for educational purposes only. Use at your own risk.