External Exposure Assessment

The centre of our External Exposure Assessment is enumeration. We enumerate your perimeter comprehensively, discovering the full range of hosts and domains genuinely associated with you. We assemble this picture from the same sources an attacker would - certificate transparency logs, DNS and WHOIS records, the IP ranges registered to your organisation through its ASN, search engines, and internet-wide scan data from services such as Shodan and Censys - precisely because the asset that hurts you is so often the one that appears in these records but on no internal inventory. Part of our goal is to find shadow IT and abandoned infrastructure that are not formally part of your asset register. Across that surface we seek to scan every port, identify the services that have them open, and determine the specific pieces of software in use and their versions. Once we have that information, we assess each against known vulnerabilities and dangerous-by-default exposure, by correlating fingerprinted versions against published CVEs and the availability of working public exploits. We pay particular attention to the high-value targets: remote access services such as RDP and VPN gateways, exposed administrative interfaces, file shares, databases that should never face the internet, and the cloud storage buckets whose misconfiguration has caused so many public breaches.

Simple tools like nmap can map what's available at a given IP address. Our goal is to clarify the gap between "this service is exposed" and "this service is exploitable", and that inherently extends to legitimately exposed services as well as forgotten ones. We go deeper by examining the configuration of legitimately exposed services and any resulting security weaknesses. This could include weak or expired TLS, missing security headers, verbose error messages that leak internal detail, or default credentials that have never been properly updated. We further map not only what is exposed but how: dangling DNS records that enable subdomain takeover, expired or misissued certificates, dependencies on third-party services that quietly extend your trust boundary. The aim is not a flat list of open ports but a judgement for each identified service about whether it should be there, whether it is current, and what an attacker could do with it.

Enumeration tells you what your systems advertise; fuzzing finds what they have not. Once we have mapped your live hosts and services, we probe each for the content and inputs that no public record points to. Against web services this means content discovery: systematically requesting likely directories, files, and endpoints with tools such as ffuf and gobuster to surface the admin panels, backup archives, exposed .git directories and .env files, forgotten staging sites, and old application versions that no link leads to but that sit a single request away. We brute-force subdomains and virtual hosts to find names that appear in no DNS or certificate record, and fuzz for the hidden parameters that widen an application's testable surface. Where an exposed network service warrants it, we can fuzz its inputs directly to surface the malformed-input handling that often betrays a deeper flaw. Fuzzing is active and noisy by nature, so we conduct it within whatever constraints you require, rate-limited and scoped to avoid disrupting anything live.

Our primary deliverable is a chart of your external footprint, with priority placed on exposures that actually matter to your organisation's security. We pair a map of your digital infrastructure with clear guidance on what to remove, harden, or bring under monitoring. Because the external surface changes continuously, our External Exposure Assessment must be considered as a point-in-time assessment. It can be valuable for organisations to contract External Exposure Assessments repeatedly to track how their exposure changes over time and flag new or changed assets as they appear. This assessment is one of the most valuable to contract repeatedly, as your perimeter is the one part of your estate that online scanners are already monitoring - for the wrong reasons.