Cloud with DJ

SSH (Secure Shell)

• Port: 22

• What it does: Provides secure remote access to Linux servers.

• Why you’ll use it: For admin tasks, remote login, deploying code, or managing configurations.

• Go-to tools: ssh, scp, rsync.

HTTP (Hypertext Transfer Protocol)

• Port: 80

• What it does: Delivers unencrypted web traffic.

• Why you’ll use it: Running web apps, setting up load balancers or reverse proxies.

• Go-to tools: nginx, apache2.

 HTTPS (Hypertext Transfer Protocol Secure)

• Port: 443

• What it does: Handles secure, encrypted web traffic.

• Why you’ll use it: Hosting secure web applications, SSL/TLS termination.

• Go-to tools: nginx, apache2, letsencrypt.

FTP (File Transfer Protocol)

• Port: 21

• What it does: Transfers files between systems (but not securely).

• Why you’ll use it: Legacy file transfer needs—but often replaced by SFTP these days.

• Go-to tools: vsftpd, proftpd.

SFTP (SSH File Transfer Protocol)

• Port: 22 (same as SSH)

• What it does: Secure file transfer using SSH.

• Why you’ll use it: When you need to upload/download files securely to/from a server.

DNS (Domain Name System)

• Port: 53

• What it does: Converts domain names into IP addresses.

• Why you’ll use it: Essential for networking, troubleshooting, and service discovery.

• Go-to tools: bind9, dnsmasq, systemd-resolved.

MySQL / MariaDB

• Port: 3306

• What it does: Default port for these SQL-based databases.

• Why you’ll use it: Powering application backends and handling structured data.

• Go-to tools: mysql, mariadb.

 PostgreSQL

• Port: 5432

• What it does: Default port for PostgreSQL.

• Why you’ll use it: Another solid choice for relational databases in backend applications.

• Go-to tool: postgresql.

 Redis

• Port: 6379

• What it does: In-memory data store used for high-speed tasks.

• Why you’ll use it: Caching, pub/sub messaging, session storage.

• Go-to tool: redis-server.

MongoDB

• Port: 27017

• What it does: NoSQL database port.

• Why you’ll use it: For applications that need flexible, document-oriented storage.

• Go-to tool: mongod.

Jenkins

• Port: 8080

• What it does: Runs your CI/CD pipelines.

• Why you’ll use it: Automating build, test, and deployment processes.

• Go-to tool: jenkins.

Docker

• Ports: 2375 (unencrypted), 2376 (encrypted)

• What it does: Allows remote API access to Docker daemon.

• Why you’ll use it: To manage containers and orchestration from remote machines.

• Go-to tools: docker, docker-compose.

Kubernetes API Server

• Port: 6443

• What it does: Manages Kubernetes clusters.

• Why you’ll use it: Everything from deploying containers to managing services.

• Go-to tools: kubectl, helm.

 Elasticsearch

• Ports: 9200 (REST API), 9300 (cluster comms)

• What it does: Powers search and analytics.

• Why you’ll use it: For log aggregation, full-text search, or as part of the ELK stack.

• Go-to tool: elasticsearch.

 

What else would you add to the list?

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