Attack Surface
See everything an attacker can.
We map your full external attack surface — domains, subdomains, exposed services, and open ports — so you know exactly what you're defending and where to start.
You can't protect what you don't know is exposed. Shadow IT, forgotten subdomains, and services that drifted public are where breaches start. We discover your internet-facing assets, map the ports and services running on them, and rank every exposure by risk.
The result is a clear inventory of your external footprint and a prioritized list of what to lock down — the foundation of any real vulnerability-management program.
Discover forgotten assets
Shadow IT, stale subdomains, and exposed services you didn't know were public — surfaced and inventoried.
Mapped & ranked
Every open port and running service identified with Nmap, then ranked by the risk it represents.
Continuous, not one-off
Re-run on a cadence so new exposure is caught as it appears, instead of once a year.
“Organizations that do not scan for vulnerabilities and address discovered flaws pro-actively face a significant likelihood of having their computer systems compromised.”
How it works
- 1
Define the perimeter
You give us your domains and IP ranges; we confirm you're authorized to assess them.
- 2
Discover
We enumerate internet-facing hosts and services across the agreed scope.
- 3
Map & rank
Nmap identifies open ports and service versions; an analyst ranks each exposure by real-world risk.
- 4
Report
You get an inventory of your external footprint and a prioritized list of what to close.
Common questions
- What's the difference from a vulnerability assessment?
- An attack surface assessment answers “what's exposed?” — the inventory of assets, ports, and services an attacker can see. A vulnerability assessment goes a step further and tests those assets for specific flaws. Many teams start here, then assess the vulnerabilities on what they find.
- What gets discovered?
- Your internet-facing hosts, subdomains, open TCP ports, and the services and versions running on them — the full outside-in view of your perimeter.
- Who is this for?
- Teams that have grown faster than their asset inventory — and MSPs/MSSPs that need to baseline a new client's exposure quickly.
- What do I get?
- A branded report with your external asset inventory, every open service mapped, and a prioritized list of exposures with guidance on what to do about each.
- Can I run this myself?
- Yes — VulnScanners is self-serve. Buy scan credits and run Nmap on your own schedule. The assessment is for when you want the discovery, analyst review, and a finished report done for you.
Request your assessment
Tell us what you'd like assessed and we'll get back to you within one business day to scope it.
Prefer self-serve? Run Nmap, Nuclei, and OWASP ZAP yourself with scan credits.