Better to use the mirror manager and https.
<title>Download a Fedora image, set a root password in it, start
it as service</title>
- <programlisting># machinectl pull-raw --verify=no http://ftp.halifax.rwth-aachen.de/fedora/linux/releases/23/Cloud/x86_64/Images/Fedora-Cloud-Base-23-20151030.x86_64.raw.xz
+ <programlisting># machinectl pull-raw --verify=no https://dl.fedoraproject.org/pub/fedora/linux/releases/23/Cloud/x86_64/Images/Fedora-Cloud-Base-23-20151030.x86_64.raw.xz
# systemd-nspawn -M Fedora-Cloud-Base-23-20151030
# passwd
# exit