Author
Jonathan Hassell
Vice President, Content and Editorial · O'Reilly Media · verified 2026-08-31
Jonathan Hassell is a technical writer and consultant based in Charlotte, NC. With over twenty-five years in information technology, he is an award-winning author of multiple technical books including RADIUS, Hardening Windows, and Learning Windows Server 2003. Jonathan specializes in Microsoft technologies, enterprise IT infrastructure, and cybersecurity.
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