https://www.techtarget.com/searchsecurity/opinion/Marcus-Ranum-Systems-administration-is-in-the-crosshairs
Marcus Ranum: Systems administration is in the 'crosshairs' | TechTarget
A system design expert credited with the first commercial firewall, Marcus Ranum is known for his willingness to question conventional security wisdom. After...
marcus ranumsystems administrationcrosshairstechtarget
https://www.nndb.com/people/881/000126503/bibliography/
Marcus Ranum: Bibliography
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https://en.wikipedia.org/wiki/Marcus_J._Ranum
Marcus J. Ranum - Wikipedia
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