Here you can see how many Mbits from different hosters with DDoS protection arrive at the server.
Here you can test your L4 power on firewalls TCP & UDP
The DSTAT can process up to 5-10 Gbit/s
Under DDoS Hetzner is limiting to 100k pps for udp and 100k pps for tcp.
Other protocols get more limited after they hit a trigger