3000
Grafana monitoring dashboards or Node.js development server
Grafana / Node.js Development
What is port 3000?
Port 3000 is used by Grafana, the most popular open-source analytics and monitoring dashboard platform. It visualizes data from Prometheus, InfluxDB, Elasticsearch, and many other data sources. It is also the default port for Node.js development servers (Express, NestJS) and the React (Create React App) dev server. If exposed, ensure authentication is configured — Grafana's default admin credentials have been the cause of several incidents.
Quick checks
$
nc -zv example.com 3000
$
nmap -p 3000 example.com
$
telnet example.com 3000