13.2. Common relevant TCP/IP ports

… plus some that are less relevant here.

Port

Default function

22

SSH

25

SMTP

80

HTTP

443

HTTPS

465

SMTPS: secure SMTP (e.g. implicit TLS for SMTP via STARTTLS)

587

MSA; e.g. explicit TLS (SSL) for SMTP

1433

Microsoft SQL Server

2575

MLLP/HL7

3306

MySQL

5432

PostgreSQL

5555

Default internal port for Flower

5672

AMQP (e.g. RabbitMQ)

8443

Relatively common alternative for HTTPS (e.g. for testing)

15672

Default internal port for RabbitMQ admin interface