Know Exactly What Services Are Exposed on Every Host
Open ports are entry points. Every service listening on a network interface is a potential target for exploitation. Our Port Scanner identifies open TCP ports, fingerprints the services behind them, and highlights the exposures that need immediate attention - all without installing anything on your infrastructure.
Try Port Scanner
Map a target's network perimeter and determine which services are reachable from the Internet. Lightning Scan checks the most common TCP ports with service detection. Full scans cover all 65,535 ports and are available with a free account.
How It Works
From target input to actionable findings in three straightforward steps.
Specify Target Hosts
Enter a single IP address, a CIDR range, or a hostname. The scanner resolves hostnames automatically and supports both IPv4 and IPv6 targets.
Select Scan Profile
Choose from predefined profiles - quick scan (top 100 ports), standard (top 1,000), or full (all 65,535 ports). Custom port ranges are also supported.
Analyze Service Fingerprints
Review open ports alongside detected service names, versions, and banners. Results are sortable by risk level, making triage straightforward.
Key Capabilities
Purpose-built scanning backed by real penetration testing expertise.
TCP SYN Scanning
Uses half-open SYN scanning for speed and stealth, completing full scans in seconds without establishing complete TCP connections.
All 65,535 Ports
Scans every possible TCP port in seconds using parallel connection techniques, catching services hidden on non-standard ports that quick scans miss.
Service Version Fingerprinting
Sends targeted probes to identify exact software versions, enabling precise CVE correlation and patch prioritization.
Banner Grabbing
Captures service banners that often reveal software versions, internal hostnames, and configuration details useful for further assessment.
Rate Limiting Controls
Configurable scan speed prevents network disruption and avoids triggering IDS/IPS alerts during authorized assessments.
Scheduled Recurring Scans
Set up periodic scans to detect newly opened ports and unauthorized services as your infrastructure evolves.
Common Use Cases
Why Use Pentestas
Security tools built by penetration testers, not just developers.
Enterprise-Grade Accuracy
Our scanning engine is built on the same methodologies our penetration testers use in manual engagements, tuned to minimize false positives and surface genuine risk.
Fast, Actionable Results
Get findings in minutes rather than days. Every result includes severity ratings, technical evidence, and clear remediation steps your team can act on immediately.
Continuous Monitoring
Schedule recurring scans from the Pentestas platform to catch regressions before they reach production. Stay ahead of new CVEs and configuration drift.
Privacy First
Your scan data is encrypted at rest and in transit. You own your data, with full control over retention and export.
Detailed Reporting
Export findings as PDF, CSV, or JSON. Feed results directly into your SIEM, ticketing system, or CI/CD pipeline through our REST API.
Instant Setup
Run scans directly from your browser. Enter a target, click scan, and receive results. Ready in under a minute.
Start scanning with Port Scanner today
Create a free account and run your first scan in under a minute. Full platform access during your 14-day trial.