Passer was written by William Stearns (wstearns@pobox.com, http://www.stearns.org/passer/). Sincere thanks go out to: - Fyodor and the nmap development team for the use of nmap-mac-prefixes and nmap-service-probes. - Michal Zalewski for the OS signatures in p0f.fp - Philippe Biondi for the underlying scapy library, and his help in understanding how to get access to parts of it. - The authors of and contributors to Linux and Python - The ettercap, wireshark, and arp-scan developers for additional mac prefix data. - The beta testers for feedback, bug reports, and improvements: Henry Stern and other anonymous testers. - Paul Schmidt, for the merghosts.pl tool.