ISPs: Configure your networks properly
"Essentially, you launch a load of small requests at a bunch of devices on SSDP UDP port 1900, spoofing the source IP address as your victim's IP address." Network operators have switches and routers that allow a packet traversal of a packet from within the network but claiming to originate from outside of the network to anywhere within their network or the public internet? How embarrassing. They should get their act together and configure their network properly. It would make launching this sort of attack using their infrastructure impossible.