Please help me, need a new VM

hey guys

I'm trying to achieve a knowledge of internet security. So I started to configure to virtual machines:

kali Linux ( which I used to attack the servers)

metasploitable (that was the server)

I'm doing pretty good but when I try to get fail2ban it gives a 404 error.

What can I do?? I'm not able to write fail2ban on my own, I already configured the net interfaces (etc/network/interface) and the settings in WMvirtualBox

 

Please Help