Port directory — page 3

TCP 995 is POP3S — POP3 wrapped in TLS from the first byte. It is the secure replacement for plaintext POP3 on 110 and the default in modern mail clients.

OpenVPN service port for VPN connections and secure tunneling

Echo (Alternative) - Alternative default port for Echo framework

Default port for Microsoft SQL Server database server

Microsoft SQL Server monitoring port for database instance discovery

Oracle database listener port for database connections and communication

RADIUS authentication port for network access authentication services

MQTT Message Queuing Telemetry Transport protocol port

MQTT WebSocketport

cPanel HTTPS port for secure web hosting control panel access

WHM HTTPS port for secure Web Host Manager access

WHM HTTPS port for alternative secure Web Host Manager access

cPanel Webmail port for web-based email client access

cPanel Webmail HTTPS port for secure web-based email access

Apache ZooKeeper client connection port for distributed coordination service

SSH protocol alternate port for secure remote access alternative

Delve - Go language debugger

Oracle database listener port for enterprise database connections

Oracle database secure listener port for SSL-encrypted database connections

Apache ZooKeeper cluster communication port for inter-cluster node communication

The Next.js CLI defaults to port 3000. Other development servers may use it too, but Node.js and React themselves do not impose a universal listener port.

HTTP proxy service port for web proxy and caching services

MySQL classic protocol defaults to TCP 3306. A local Unix-socket connection may bypass TCP entirely, so a port check alone cannot establish whether MySQL is running.

Windows Remote Desktop defaults to 3389. Check the TCP and UDP paths used by your deployment and whether Remote Desktop is enabled.