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 (implicit TLS for SMTP)
587	MSA; e.g. explicit TLS (via STARTTLS command) 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