Bandwith problem

Hello,

after changing the internet provider we have a bandwith of 430 mbit/s instead of 50 mbit/s before. Unfortunately it seems that the NS gateway is not capable to handle this speed. A client computer gets not more than about 100 mbit/s at maximum. I tried the connect with pfsense as gateway and it works like it should. Any ideas, what slows down the traffic? It would be a pity if I had to say good bye to Nethserver.

Ralph