Skip to Content
Attack Surface Management
book

Attack Surface Management

by Ron Eddings, MJ Kaufmann
May 2025
Intermediate to advanced
300 pages
9h 37m
English
O'Reilly Media, Inc.
Content preview from Attack Surface Management

Chapter 5. Automating Asset Discovery

Any organization starting its ASM journey needs a complete asset inventory. Too often, that involves some unfortunate but well-meaning person grabbing a notepad and exploring which departments own certain assets. Unfortunately, once they’ve jotted down every laptop, server, and software license they can find, the list is still full of holes. Remote workers’ devices are missing, cloud services hide in plain sight, and virtual machines lurk in the shadows.

Reality sinks in as your notepad overflows with scribbled pages: manual asset discovery is a nightmare. It’s time-consuming, error-prone, and hopelessly incomplete in the face of modern IT complexity. Spreadsheets can’t capture the complete picture when assets live on-premises, in the cloud, and everywhere in between.

Welcome to the wild world of asset management, where “good enough” discovery is never enough, yet often it’s the best an organization has. The good news is that there is a smarter approach, and that’s important in ASM, where a single overlooked asset can spell disaster with unmanaged risk.

This smarter approach is called automated asset discovery. It’s the secret weapon for mapping that tangled web of hardware, software, and services that power our businesses. With the right tools, you can illuminate every corner of the IT environment, from physical servers to virtual desktops to SaaS applications.

The hard truth is that in today’s hybrid, multicloud world, you can’t protect ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.

Read now

Unlock full access

More than 5,000 organizations count on O’Reilly

AirBnbBlueOriginElectronic ArtsHomeDepotNasdaqRakutenTata Consultancy Services

QuotationMarkO’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Julian F.
Head of Cybersecurity
QuotationMarkI wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.
Addison B.
Field Engineer
QuotationMarkI’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.
Amir M.
Data Platform Tech Lead
QuotationMarkI'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Mark W.
Embedded Software Engineer

You might also like

Cybersecurity Risk Management

Cybersecurity Risk Management

Cynthia Brumfield, Brian Haugli

Publisher Resources

ISBN: 9781098165079Errata Page