Hetzner 1GB port is shared ?

on 17th,I bought the discount server with payment 23 EURO. on 26th I tried to download a file from KIMSUFI franch server, at the beginning, it has a speed of 10MB/S, shows 4 hours will finish downloading. but 2hours later, when I check, the speed is about 2MB/S, and shows about 12 hours will finish the downloading and 40hours later, the downloading still not finished, now the speed is about 100-200kb/s

I doubt if the KS4C limit the speed, and used a linode Germany location to try download the file. in 2 hour, the speed is always over 8mb/s

So I'm thinking, if the hetzner limiting the speed or the 1GB port shared? and do u have same condition?