External NetworkPentesting
Discover how your external attack surface holds up against real-world adversaries. We map and exploit exposed services, perimeter controls, and internet-facing infrastructure before attackers do. External networks are continuously targeted through weak perimeter filtering, misconfigured firewalls and VPNs, exposed management interfaces, and forgotten assets — a professional external pentesting validates how far a determined attacker can pivot from the internet into your environment.
- Advanced manual testing that goes far beyond basic vulnerability scanning
- Real-world perimeter attack simulations mirroring modern external threat actors
- Deep analysis of internet-facing services, cloud edge, VPNs, and remote access exposure
- Every finding validated with realistic attack paths and clear remediation guidance
Phase 01
External Recon & Attack Surface Mapping
We identify domains, IP ranges, DNS records, exposed services, cloud edges, and forgotten assets reachable from the internet.
Phase 02
Service Enumeration & Fingerprinting
We enumerate ports, protocols, banners, and technologies to build an attacker-centric view of your external perimeter.
Phase 03
Vulnerability Discovery & Exploitation
We combine automated scanning with deep manual testing to exploit misconfigurations, CVEs, and weak perimeter controls.
Phase 04
Authentication, VPN & Remote Access Testing
We assess VPNs, SSO portals, remote access gateways, and admin interfaces for weak authentication and access control flaws.
Phase 05
Cloud & Edge Infrastructure Abuse Cases
We test edge services, WAF/CDN bypass, exposed management panels, and cloud misconfigurations impacting your external posture.
Phase 06
Reporting, Remediation & Retest
Clear risk-based reporting, prioritized remediation guidance, and complimentary retesting to validate fixes.
Penetration Testing Aligned with External Network Standards
EntrySec external network penetration tests are mapped to OSSTMM, PTES, NIST SP 800-115 and SANS SEC560 / SEC575, so your security, infrastructure and compliance teams can interpret results using the same language as modern perimeter and network security frameworks.
Everything You Need for Compliance
EntrySec external network penetration testing reports are structured so they can be reused for ISO 27001, SOC 2, PCI DSS, GDPR, HIPAA and other assurance frameworks, helping you demonstrate real perimeter security maturity to auditors, customers and regulators.
OSSTMM
PTES
NIST SP 800-115
SANS SEC560 / SEC575
GDPR
SOC 2
ISO 27001
HIPAA
PCIWhy EntrySec is #1
Learn more about our External Network Penetration Testing
EntrySec is led by senior External Network Penetration Testers who specialize in breaking into internet-facing infrastructure the same way real attackers do. We map and probe your public attack surface — exposed services, misconfigured firewalls, outdated systems and cloud edge misconfigurations — to show exactly how a perimeter breach can occur in practice. Through manual exploitation attempts, chained attack-path analysis and deep service fingerprinting, we turn a flat list of open ports and CVEs into a clear narrative of how an attacker can move from the internet to your critical systems.
Purpose-built for external perimeter testing. Focus on internet-facing IPs, domains, VPNs, remote access and cloud edges that real attackers target first.
Scanner output is only the starting point. We manually validate exploitable paths, remove noise and elevate the issues that truly enable initial compromise.
Real attacker chain-of-attack visibility. Understand how multiple small misconfigurations combine into full perimeter breach and foothold in your environment.
Cloud and on-prem perimeter coverage. Testing aligned to modern hybrid infrastructures across AWS, Azure, GCP and traditional data centers.
Clear story for security, IT and leadership. Executives see business impact, engineers get actionable fixes, and compliance teams get evidence for audits.
External Perimeter Weaknesses We Consistently Uncover
Industry-Leading Tools Used Against Internet-Facing Assets
Pentesting Deliverables
Comprehensive, actionable, and professionally prepared documentation to support your security assessment.
Report
Comprehensive, detailed, and easy-to-understand pentesting reports
Fix Recommendations
Effective, actionable remediation steps to assist you in addressing the identified findings
Slack Channel
We'll be accessible anytime through a shared Slack channel with your team
Free Retesting
Your first retesting is included as part of the pentesting package.
Attestation Letter
A professionally prepared document that verifies the completion of pentesting
Technical Presentation
Detailed presentations designed for your technical teams to discuss pentest results
By The Numbers
98%
OWASP Top 10 coverage
1000+
Applications tested
35+
Enterprises served
300+
Security checks
Frequently Asked Questions
Straightforward answers to the most common questions about our External Network Penetration Testing services and how they strengthen your perimeter security and risk management program.
Regular external network penetration testing should be conducted at least annually or after significant changes to your internet-facing infrastructure. Frequent testing helps identify new vulnerabilities, misconfigurations, and exposure points before attackers can exploit them.
The duration of an external network penetration test depends on the number of public-facing assets and the complexity of your environment. Most engagements range from a few days to a couple of weeks. We align timelines with your operational needs and planned maintenance windows.
External network penetration testing can uncover exposed services and open ports, firewall and perimeter misconfigurations, outdated or vulnerable software, weak VPN or remote-access configurations, insecure DNS or SSL/TLS setups, and vulnerabilities in internet-exposed web services and applications.
External network penetration testing goes beyond vulnerability scanning by actively simulating real-world attacks on your internet-facing infrastructure. A vulnerability assessment identifies and prioritizes known weaknesses using automated tools, but penetration testing manually validates those weaknesses to understand their true impact and whether they can actually be exploited. In short: vulnerability assessments show what is vulnerable — external penetration testing shows what can truly be breached.
By proactively discovering and validating vulnerabilities in your external environment, penetration testing reduces the attack surface available to cybercriminals. Remediating the findings helps prevent unauthorized access, data breaches, ransomware incidents, and other cyberattacks by keeping your perimeter defenses hardened and up to date.
Yes. We offer a free initial consultation to review your external footprint, discuss your objectives and compliance drivers, and recommend an appropriate external network penetration testing scope and cadence. We will also walk you through our methodology, tooling, and reporting so you know exactly what to expect.
We are here to support your business
Speak directly with our senior security experts — we’ll help you define goals, timelines, and actionable steps.