Port directory — page 3
Registry assignments, software defaults and local listeners are different things. A port number alone does not identify or secure a service.
Common Ports Overview
POP3S (POP3 over SSL/TLS) Security POP3Protocolport
Common Software (3)
OpenVPN service port for VPN connections and secure tunneling
Common Software (2)
OpenVPN UDPPort
VPNService
Echo (Alternative) - Alternative default port for Echo framework
Common Software (1)
Alternative default port for Echo framework
Default port for Microsoft SQL Server database server
Common Software (2)
Default port for Microsoft SQL Server database server
Default port for Microsoft Azure SQL database
Microsoft SQL Server monitoring port for database instance discovery
Common Software (1)
Microsoft SQL Server Browser service
Oracle database listener port for database connections and communication
Common Software (2)
Default port for Oracle database listener
Oracle Database Express Edition - free version
RADIUS authentication port for network access authentication services
Common Software (1)
RADIUS Remote Authentication Dial-In User Service
MQTT Message Queuing Telemetry Transport protocol port
Common Software (3)
MQTT Message Queuing Telemetry Transport protocol port
ThingsBoard MQTTPort
IBM Watson IoT MQTTPort
MQTT WebSocketport
Common Software (1)
MQTT WebSocketPort
cPanel HTTPS port for secure web hosting control panel access
Common Software (2)
cPanel SSLSecurityConnection
SecurityRADIUSProtocol
WHM HTTPS port for secure Web Host Manager access
Common Software (1)
WebHost ManagerServerManagement
WHM HTTPS port for alternative secure Web Host Manager access
Common Software (1)
WHM SSLSecurityConnection
cPanel Webmail port for web-based email client access
Common Software (1)
cPanel webmail service
cPanel Webmail HTTPS port for secure web-based email access
Common Software (1)
cPanel SSL webmail service
Apache ZooKeeper client connection port for distributed coordination service
Common Software (2)
Default port for Apache ZooKeeper coordination service
ZooKeeperClusterPlatform
SSH protocol alternate port for secure remote access alternative
Common Software (2)
DirectAdmin SSLConnection
SSH protocol alternate port for secure remote access alternative
Delve - Go language debugger
Common Software (1)
Go language debugger
Oracle database listener port for enterprise database connections
Common Software (1)
Oracle Database SSL service
Oracle database secure listener port for SSL-encrypted database connections
Common Software (1)
Oracle Database connection pool service
Apache ZooKeeper cluster communication port for inter-cluster node communication
Common Software (2)
DistributedServiceClusterPort
ZooKeeper inter-node communication port
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.
Common Software (29)
Node.js is a runtime; the application chooses its listening port.
A React application uses the development port configured by its build tool or framework.
The Next.js CLI defaults to 3000; change it with --port.
HTTP proxy service port for web proxy and caching services
Common Software (3)
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.