Comprehensive multi-port network analysis tool for developers and IT professionals. Scan up to 50 ports simultaneously with advanced service detection and security assessment - completely free!
Advanced bulk port scanning and port checking engine for comprehensive network analysis, service discovery, and security assessment across multiple ports.
| Port | Status | Service | Response | Banner | Risk |
|---|
Concurrent multi-threaded port scanning and port checking architecture capable of analyzing 50 ports simultaneously with sub-second response times for most networks.
Advanced service detection engine identifies applications, versions, and potential security vulnerabilities through banner analysis and behavioral patterns.
Detailed response time analysis helps identify network bottlenecks, service performance issues, and optimal routing paths for your infrastructure.
Export detailed port scanner and port checker results in CSV format for integration with security systems and compliance reporting - completely free.
Modern containerized environments require comprehensive port monitoring across multiple layers of the infrastructure stack:
| Component | Default Port | Purpose | Security Considerations |
|---|---|---|---|
| API Server | 6443 | Kubernetes cluster management | Critical - requires strong RBAC and TLS |
| Kubelet | 10250 | Node agent communication | Should not be publicly accessible |
| etcd | 2379, 2380 | Cluster state storage | Contains sensitive cluster secrets |
| Scheduler | 10259 | Pod scheduling decisions | Internal component - restrict access |
| Controller Manager | 10257 | Cluster state reconciliation | Internal component - restrict access |
Our free bulk port scanner and port checker employs multiple techniques to accurately identify services and potential security risks:
Analyzes connection establishment patterns to determine service responsiveness and protocol compliance.
Captures service banners and headers to identify software versions and potential vulnerabilities.
Measures response latencies to identify performance bottlenecks and service health issues.
| Risk Level | Criteria | Common Examples | Recommended Actions |
|---|---|---|---|
| Critical | Unencrypted admin interfaces, default credentials | Telnet (23), HTTP admin panels (8080) | Immediate remediation required |
| High | Known vulnerable services, unnecessary exposure | SSH with weak auth (22), FTP (21) | Strengthen authentication, restrict access |
| Medium | Standard services with proper security | HTTPS (443), Secure databases | Regular monitoring and updates |
| Low | Well-secured, necessary services | Properly configured web services | Maintain current security posture |
Modern database deployments often involve complex port configurations across multiple nodes. Our port scanner and port checker tools help understand these patterns for comprehensive security assessment:
Monitor replication lag and failover mechanisms through port health checks.
Critical for detecting primary/secondary election changes and cluster topology.
Monitor cluster topology changes and sentinel failover configurations.
Essential for cluster state synchronization and split-brain detection.
Continuous integration and deployment pipelines introduce numerous port-based services that require ongoing port scanning and port checking for security assessment:
# Jenkins Infrastructure
8080 - Jenkins web interface
50000 - Jenkins agent communication
9000 - SonarQube analysis server
8081 - Nexus artifact repository
# GitLab CI/CD
80/443 - GitLab web interface
22 - Git SSH access
5050 - GitLab Container Registry
9090 - GitLab Runner metrics
# Prometheus Stack
9090 - Prometheus server
9093 - Alertmanager
9094 - Alertmanager cluster
3000 - Grafana dashboards
# ELK Stack
9200 - Elasticsearch HTTP
9300 - Elasticsearch transport
5601 - Kibana interface
5044 - Logstash beats input
Automated port scanning and port checking should be integrated into CI/CD pipelines to ensure continuous security assessment:
# Example GitHub Actions workflow for port security scanning
name: Infrastructure Security Scan
on:
schedule:
- cron: '0 2 * * *' # Daily at 2 AM
workflow_dispatch:
jobs:
port-security-scan:
runs-on: ubuntu-latest
steps:
- name: Bulk Port Security Assessment
run: |
# Scan critical infrastructure hosts
curl -X POST "https://portchecker-1lz.pages.dev/api/v1/port-check-bulk/" \
-H "Content-Type: application/json" \
-d '{
"ip_address": "${{ secrets.PROD_SERVER_IP }}",
"ports": [22,80,443,3306,6379,9090],
"timeout": 5
}' | jq '.results[] | select(.status == "Open")'
# Fail build if unauthorized ports detected
if [ $? -ne 0 ]; then
echo "Security scan failed - unauthorized ports detected"
exit 1
fi
System services requiring privileged access. Critical for baseline port scanner and port checker security assessment and service inventory.
Application-specific services and software. Requires custom port checker analysis for service identification.
Schedule bulk port scans and port checks during low-traffic periods to minimize network impact and improve accuracy of response time measurements.
Break large port ranges into smaller segments to avoid triggering intrusion detection systems and improve port scanner reliability.
Implement appropriate delays between requests to maintain network stability and avoid being blocked by security systems.
| Issue | Symptoms | Root Cause | Solution |
|---|---|---|---|
| Incomplete Results | Missing ports in port scanner results | Network timeouts or rate limiting | Increase timeout values, reduce concurrent requests |
| False Positives | Ports showing open when they're filtered | Firewall response behavior | Enable banner grabbing for verification |
| Slow Performance | Extended port scanner duration | Network latency or congestion | Reduce port count or adjust timeout settings |
| Blocked Port Scanning | Connection refused or filtered | IDS/IPS detection or rate limiting | Implement port scanning delays, use different source |