Essential Network Ports Every DevOps Enginner Must Know
Good Morning everyone! In today’s post, we will learn the most important network ports used by different services. Understanding these ports will help you strengthen your networking and DevOps fundamentals.
Network ports are communication endpoints used by applications and services to exchange data over a network. Understanding commonly used ports is important for Linux administrators, Cloud engineers, DevOps engineers, and Cybersecurity professionals.
DevOps Basics : Important ports you should never forget, from 80 to 8080 – ports that power modern application and internet services. Networking Fundamentals for DevOps Engineer.
| Service | Default Port |
| HTTP ( Hypertext Transfer Protocol ) | 80 |
| HTTPS ( Hypertext Transfer Protocol Secure ) | 443 |
| SSH ( Secure Shell ) | 22 |
| FTP ( File Transfer Protocol ) | 21 |
| MYSQL | 3306 |
| Kubernetes API Server | 6443 |
| Docker Daemon API ( non-TLS ) | 2375 |
| Docker Daemon API ( TLS ) | 2376 |
| MongoDB | 27017 |
| NGINX | 80 / 443 |
| Grafana | 3000 |
| Prometheus | 9090 |
| Tomcat | 8080 |
| Apache Kafka | 9092 |
| Redis | 6379 |
| RDP ( Remote Desktop Protocol ) | 3389 |
| Elasticsearch REST API | 9200 |
| Jenkins | 8080 |
| SMTP ( Simple Mail Transfer Protocol ) | 25 |
| PostgreSQL | 5432 |
| Git | 9418 |
| DNS ( Domain Name System ) | 53 |
All the information in this article is gathered from official Service documentation and networking references. If you have any questions or want to learn more, feel free to leave a comment or contact us through the Contact us page.
FAQ section :
Frequently Asked Questions
Question: Commands to check open Ports in linux.
Answer: ( These commands display listening ports in Linux.
$ netstat -tulnp
or
$ ss -tulnpQuestion: Why Network ports are important in DevOps ?
Answer: DevOps engineers frequently work with Servers, Containers, Kubernetes clusters, CI/CD tools, Monitoring tools, and Cloud infrastructure. Understanding network ports helps troubleshoot connectivity issues, configure firewalls, and secure applications.
Question: What is the default port of Jenkins ?
Answer: The default port of Jenkins is 8080.
Question: What is the default port of Redis ?
Answer: The default port of Redis is 6379.
Question: What is the default port of SSH ?
Answer: The default port of SSH is 22.
