What is Nginx default port?

Nginx uses port 80 for HTTP and 443 for HTTPS.

What is MySQL default port?

MySQL uses port 3306 for client connections.

Redis uses port 6379 by default.

Message brokers and queue systems

3 services

rabbitmq-server systemctl: rabbitmq-server

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Feature-rich message broker. Supports AMQP, MQTT, STOMP. High availability, clustering.

apt install rabbitmq-server

5672tcpAMQP5671tcpAMQP with TLS15672tcpManagement UI25672tcpErlang distribution1883tcpMQTT61613tcpSTOMP

kafka systemctl: kafka (custom service file)

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Distributed event streaming platform. High-throughput, fault-tolerant message queue.

Download from Apache Kafka website and extract (not in repos)

9092tcpKafka broker9093tcpKafka SSL2181tcpZookeeper (legacy)9094tcpKRaft controller

redis-mq systemctl: redis-server

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Redis used as message broker with Pub/Sub or Streams. Lightweight MQ solution.

apt install redis-server (same as caching)

6379tcpRedis protocol