The AMP-Research project collects information about amplification vectors in protocols including reproduction possibilities. For each vector, the port and protocol are listed, as well as, the amplification factor. A scanning script or payload for scanning with zmap is included too.

Contains a list of UDP-based protocols, which can be used for amplification attacks.

The website shows ongoing DDoS attacks in real time. Attacks are shown with source and destination country. They have further information, such as the used protocols and attack bandwidth.

The Netlab of 360.com provides some open data streams.

One dataset concerns the number of abused reflectors per protocol.

Overview of IP addresses scanning the internet and which ports are scanned.