External Network Pen Testing

Overview

Your external perimeter is the first line of defense. This engagement evaluates all internet-facing assets, including firewalls, web and mail servers, VPN gateways, DNS servers, and cloud infrastructure, to find vulnerabilities a remote attacker could exploit for unauthorized access.

We simulate real-world attack scenarios using the same tools, techniques, and procedures employed by threat actors and advanced persistent threat groups.

Methodology

We begin with OSINT and reconnaissance, using passive DNS analysis and certificate transparency logs to identify every internet-facing asset and any shadow IT.

Full TCP/UDP port scanning, service and OS fingerprinting, and detailed enumeration feed vulnerability analysis of known CVEs, misconfigurations, and default credentials, which are then validated through controlled exploitation, including attempts to pivot inward.

The engagement closes with a risk-prioritized report carrying CVSS scoring, evidence of exploitation, and actionable remediation organized by severity and business impact.

What you gain

You see your organization the way external attackers do, identifying the same entry points they would target, and discover forgotten or unknown assets, shadow IT, and legacy systems that expose unnecessary risk.

The engagement supports external testing requirements for PCI DSS, SOC 2, ISO 27001, and NIST CSF, and delivers specific firewall rules and hardening recommendations to strengthen your perimeter.

Engagement and delivery

External network testing is scoped as a custom engagement: you describe your environment and we propose the approach, timeline, and a fixed price. A typical engagement runs one to two weeks.

Every finding is delivered with severity, a proof of concept, and remediation guidance, tracked from discovery through a verified retest to a certificate.

Frequently asked questions