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.
From the Redaxer blog
Patch Tuesday: deciding what to fix first
The August Patch Tuesday article connects asset visibility with patching priorities.
Read the article in ItalianOutcomes
From discovery to decisions for IT.
External inventory
An organised view of observed assets and their technical context, to compare with your internal inventory and validate with service owners.
Operational priorities
Exposures and changes to review, prioritised by risk. Your team can decide which services should remain public, be corrected or receive deeper assessment.
Reports and updates
Evidence to follow changes and discuss action with technical teams. Frequency, scope and responsibilities are defined as part of the service.
Discover the EASM serviceBefore we talk
Start with the domains and services you know.
Prepare your corporate domains, known public services and contacts who can confirm asset ownership. An environment associated with a supplier needs verification before inclusion. EASM helps discover and prioritise exposure; validating exploitability requires an authorised assessment, while corrections need to be assigned to system owners.
Next step
Want to clarify what your organisation exposes?
Tell us which domains and services you manage and where visibility is missing. We start with a shared scope.