Uncertain Times — Infosec's here to help. Learn about our COVID-19 Response Package.

Claim your FREE 7-day trial

Passive Intelligence Gathering

Learn about passive intelligence gathering, one of the key aspects of ethical hacking, in this four-video overview course.

4 videos  //  77 minutes of training

Course overview

Passive intelligence gathering is a key part of any penetration test or ethical hack. This course explores the why and how of passive intelligence gathering in four videos, covering the goals of the intelligence-gathering phase, first- and third-party sources of information, Regional Internet Registries (RIRs), Google hacking, tools and more, as well as specific units on intelligence gathering through the investigation of DNS and SNMP. Remember: knowledge is power, and knowledge they don’t know you have is even better.

Course syllabus

Passive Intelligence GatheringDuration: 21:15

Abusing DNSDuration: 22:19

Abusing SNMPDuration: 18:47

TCP-IP for HackersDuration: 14:15

Meet the author



At Infosec, we believe knowledge is the most powerful tool in the fight against cybercrime. We help IT and security professionals advance their careers with a full regimen of certification and skills training. We also empower all employees with security awareness training to stay cybersecure at work and home. Driven by smart people wanting to do good, Infosec educates entire organizations on how to defend themselves from cybercrime. That’s what we do every day — equipping everyone with the latest security skills so the good guys win.

You're in good company

"Comparing Infosec to other vendors is like comparing apples to oranges. My instructor was hands-down the best I’ve had." 

James Coyle

FireEye, Inc.

"I knew Infosec could tell me what to expect on the exam and what topics to focus on most."

Julian Tang

Chief Information Officer

"I’ve taken five boot camps with Infosec and all my instructors have been great."

Jeffrey Coa

Information Security Systems Officer

Plans and pricing





$599 / license

Annually. Includes all content plus team admin and reporting.