Commonly Used Network Ports in DevOps and Cloud Environments

Here's a breakdown of commonly used network ports and their significance in a DevOps and cloud environment:

Service	Port	Description
HTTP	80	Used for unencrypted web traffic. It’s the foundation of data communication on the web.
HTTPS	443	Secures HTTP traffic with encryption using SSL/TLS. Essential for secure web browsing.
SSH	22	Enables secure remote login and command execution on servers. Vital for server administration.
FTP	21	Used for file transfers over a network. Commonly seen in legacy systems.
DNS	53	Resolves domain names to IP addresses, enabling human-friendly URLs.
MySQL	3306	The default port for MySQL database. Allows apps to connect and query the database.
Kubernetes API Server	6443	Used for controlling and managing Kubernetes clusters.
Docker Daemon API	2375/ 2376	Interacts with the Docker Engine for container management.
MongoDB	27017	Default port for MongoDB, a popular NoSQL database.
NGINX	80/ 443	Acts as a web server or reverse proxy, handling HTTP/HTTPS traffic.
Grafana	3000	Visualizes metrics and logs, often used in conjunction with Prometheus for monitoring.
Prometheus	9090	Collects and stores time-series data for monitoring.
Tomcat	8080	A web server for Java applications, commonly used for hosting Java-based web applications.
Apache Kafka	9092	Used for distributed messaging and data streaming in real-time.
Redis	6379	An in-memory database used for caching and real-time analytics.
RDP	3389	For remote desktop connections, mainly in Windows environments.
Elasticsearch API	9200	Provides search and analytics capabilities for large datasets.
Jenkins	8080	Automates CI/CD processes in software development.
SMTP	25	Used for sending emails between servers, especially in email server communications.

This table provides a concise overview of each port and its associated service, helping DevOps engineers and cloud professionals understand and manage network communication more effectively.