I have a odd problem with Samba. Whenever I copy/moves files to/from my Ubuntu server via Samba my internet stops working. As soon as the file transfer is complete, its all back to normal again.

Ive been using Arch Linux for years on both of my Desktop PC and my server. But recently I switched back to Ubuntu on both of them, the problem started when I went back to Ubuntu.

As it used to work with Arch and when I benchmarked my router it could handle about 100-150 connections at a speed at 960 Mbit, I dont think the hardware are to blame for this.

Im also using the same config for Samba for the past 4-5 years.

What to do?