1. Domains Monitor. https://domains-monitor.com/. Accessed 25 Jan 2023
2. Rapid7 labs. https://opendata.rapid7.com/. Accessed 11 Dec 2022
3. Fraunhofer AICOS: TSFEL documentation release 0.1.4 (2021). https://tsfel.readthedocs.io/_/downloads/en/development/pdf/. Accessed 2 Nov 2021
4. Antirez: http://seclists.org/bugtraq/1998/Dec/0079.html. Accessed 16 Jan 2022
5. Baker, F., Savola, P.: RFC 3704: ingress filtering for multihomed networks (2004)