I am getting ridiculously slow download speeds whenever I try either apt-get update, or apt-get upgrade, etc. My internet connection is relatively fast, but I am getting speeds of 15 kB/seconds. I have tried changing my repositories, trying out the apt-fast program, but nothing works. I am getting the same problems on all 3 of my Kali VM's, along with my full Kali install on my desktop. Any ideas, as it is taking hours when I need to update my OS?