Marcus J. Ranum

Marcus J. Ranum
Born (1962-11-05) 5 November 1962
New York City, New York, U.S.
NationalityAmerican
Alma materJohns Hopkins University
EmployerTenable, Inc.
Known forComputer and Network Security Innovator
Websitewww.ranum.com

Marcus J. Ranum (born November 5, 1962, in New York City, New York, United States) is a computer and network security researcher. He is credited with a number of innovations in firewalls, including building the first Internet email server for the whitehouse.gov domain, and intrusion detection systems. He has held technical and leadership positions with a number of computer security companies, and is a faculty member of the Institute for Applied Network Security.