Check if specific ports are open on remote servers - with 200+ preset ports for common services
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Enter a host and port, or select from presets
Port Checker is a free online tool that tests whether a specific port on a server or IP address is open or closed. Ports are virtual endpoints for network communications, and checking their status is essential for troubleshooting connectivity issues with web servers, email, databases, and other services.
Our tool includes 200+ preset ports organized by category including web servers, databases, email, gaming, IoT, network equipment (Cisco, Ubiquiti, MikroTik), VPN, DevOps, and more.
Pre-configured ports for web, databases, gaming, IoT, Cisco, Ubiquiti, MikroTik, and more.
One-click scans for Top 20, Top 100, Web Servers, Databases, and Security audits.
Scan single ports, multiple ports, or entire port ranges efficiently.
Search ports by number, service name, or description. Filter by category.
Common ports include: 21 (FTP), 22 (SSH), 25 (SMTP), 80 (HTTP), 443 (HTTPS), 3306 (MySQL), 5432 (PostgreSQL), 3389 (RDP), 27017 (MongoDB), and 6379 (Redis).
An open port has a service listening and accepting connections. A closed port has no service listening. A filtered port means a firewall is blocking the connection attempt.
Port checking helps verify services are running, troubleshoot connection issues, test firewall configurations, and ensure security by confirming unused ports are closed.