TCP Port Connector & Socket Tester | iN2 Tools

Probe a remote host port (socket handshake) to audit port connectivity and response latency.

TCP Port Connection & Socket Health Checker

Perform a raw 3-way TCP SYN/ACK handshake test against specific port numbers (80, 443, 22, 25, 3389, 5432). Verify firewall rules, service responsiveness, and connection latency.

Understanding TCP 3-Way Handshakes (RFC 9293)

The Transmission Control Protocol (TCP) establishes reliable connections using a 3-way handshake sequence (SYN → SYN-ACK → ACK) as specified in RFC 9293.

Common Service Ports & Protocols

  • Port 22 (SSH): Secure Shell remote server access.
  • Port 25 (SMTP): Mail Transfer Agent email relay connectivity.
  • Port 80 / 443 (HTTP / HTTPS): Web server web traffic & TLS encryption.
  • Port 3306 / 5432 (MySQL / PostgreSQL): Database management system sockets.

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