Public assets
Domains, subdomains, IP addresses, services and externally accessible technologies.
Redaxer Research
EASM: what External Attack Surface Management is
The external attack surface changes continuously. EASM makes it visible, contextualised and prioritised.
External Attack Surface Management
Your internal inventory does not always match what the internet can see.
Domains, subdomains, public services, cloud environments, acquisitions, pilots and suppliers can expand exposed surface faster than inventory processes. EASM starts from the outside perspective and helps distinguish expected assets from those needing verification.
What EASM observes
Shadow IT
Unmanaged assets, forgotten environments and exposure outside normal processes.
Changes
New services, technical variation and openings that require timely review.
Priorities
Context and risk to focus first on the most relevant exposures.
EASM, Penetration Testing and SOC
Three complementary perspectives.
EASM shows what is visible and how the exposed surface changes. A Penetration Test examines selected assets in depth. A SOC such as ARGUS monitors signals and behaviours inside covered environments. Together they connect external discovery, technical validation and continuous monitoring.
When it is useful
Situations where external visibility makes a difference.
Growth and change
New domains, cloud services, offices, teams or suppliers can create unexpected exposures.
Poorly documented perimeter
When the inventory is fragmented or does not match what is actually published.
Continuous control
When a point-in-time assessment is not enough to catch changes over time.
Next step
Want to understand your real attack surface?
Start with exposed assets and the priorities of your context.