Guide
Check Open Ports Online
Free online port scanner powered by AI. Detect open ports, identify services, and get instant vulnerability remediation.
Why Check Open Ports?
Every open port is a door into your network. Some are supposed to be open — your web server on 443, SSH on 22. But others might be running forgotten services, default configs, or outdated software that attackers love to find. Checking your open ports helps you catch those before someone else does.
- Discover forgotten or unauthorized services running on your infrastructure
- Identify misconfigured firewalls exposing internal services to the internet
- Detect known vulnerable versions of software before attackers do
- Validate security controls after configuration changes
- Maintain compliance with security standards (PCI DSS, ISO 27001, SOC 2)
How to Check — Step by Step
Enter Your Target
Navigate to the NetAudit AI Dashboard and type the IP address, hostname, or domain you want to scan in the target field. You can scan individual hosts (e.g. 192.168.1.1) or entire subnets (10.0.0.0/24).
Choose Your Scan Profile
Select Quick Audit to scan the top 100 most common ports (completes in 30-60 seconds) or Deep Inspection to scan ports 1-1000 with thorough service fingerprinting.
Run the Scan
Click Run Audit. The radar animation displays scan progress in stages: Initializing, Scanning, Analyzing, and Inferring. No signup or account required.
Review Your Results
Once complete, you'll see a donut chart showing vulnerability severity distribution, a table of open ports with service names and risk levels, HTTP security header analysis for any web services detected, and an AI-generated remediation plan with prioritized action items.
Export or Act
Export your results as a PDF report for documentation, or follow the AI remediation steps immediately to secure your infrastructure.
Common Open Ports and Their Risks
| Port | Service | Risk If Exposed |
|---|---|---|
| 22 | SSH | Brute force attacks, unauthorized access |
| 23 | Telnet | Unencrypted protocol, credentials leaked |
| 80 | HTTP | Missing encryption, traffic sniffing |
| 443 | HTTPS | Low risk if properly configured |
| 3389 | RDP | Frequent target for ransomware attacks |
| 3306 | MySQL | Database exposure, data breach risk |
| 5432 | PostgreSQL | Database exposure, data breach risk |
| 6379 | Redis | Unauthenticated access, data loss |
| 27017 | MongoDB | Ransomware, data exfiltration |