Online Port Scanner for Security & Network Diagnostics

Test whether specific TCP ports on any server, domain, or IP address are open or blocked. This tool helps you verify firewall rules, detect exposed services, and troubleshoot hosting, VPS, proxy, game servers, mail servers, and API endpoints — no software installation required.

What you can use this for:

• 🔐 Check if ports like 80/443 (web), 22 (SSH), 25 (SMTP), 3306 (MySQL) are accessible
• 🛡️ Validate firewall or Cloudflare filtering behavior
• ⚙️ Confirm VPS / Dedicated / Docker service availability
• 📡 Scan public services before penetration testing or bug bounty
• 🧩 Diagnose failed APIs, blocked mail ports, or closed DB endpoints

Supported Features:

• ✅ Single port, multi-port, or full range (1–65535)
• ✅ Custom timeout control for slow networks
• ✅ Built-in presets: Web, DB, Top 100, Common Services
• ✅ Works with IPv4, IPv6, domain hostname, and raw IP

💡 Keyword topics included: cybersecurity audit, firewall testing, port vulnerability scan, network exposure check, remote port lookup, ethical hacking tool, external attack surface scan.