Understanding Default TCP and UDP Ports

Amaresh Pelleti

Introduction: Default ports are essential for enabling communication between applications and databases over networks. This article provides a comprehensive overview of common default ports used with TCP (Transmission Control Protocol) and UDP (User Datagram Protocol), covering various applications and databases.

TCP Default Ports

  1. HTTP (Hypertext Transfer Protocol)
  • Port: 80
  • Usage: Used for serving web content over the internet.
  1. HTTPS (HTTP Secure)
  • Port: 443
  • Usage: Secured version of HTTP, encrypting data over the internet.
  1. SSH (Secure Shell)
  • Port: 22
  • Usage: Provides secure remote access to servers and systems.
  1. FTP (File Transfer Protocol)
  • Port: 21
  • Usage: Facilitates file transfers between servers and clients.
  1. SMTP (Simple Mail Transfer Protocol)
  • Port: 25
  • Usage: Sending emails between mail servers.
  1. POP3 (Post Office Protocol version 3)
  • Port: 110
  • Usage: Retrieves emails from a mail server to a client.
  1. IMAP (Internet Message Access Protocol)
  • Port: 143
  • Usage: Allows access and management of email on a mail server.

UDP Default Ports

  1. DNS (Domain Name System)
  • Port: 53
  • Usage: Translates domain names into IP addresses.
  1. DHCP (Dynamic Host Configuration Protocol)
  • Port: 67, 68
  • Usage: Assigns IP addresses to devices on a network.
  1. SNMP (Simple Network Management Protocol)
  • Port: 161
  • Usage: Manages devices on IP networks.
  1. TFTP (Trivial File Transfer Protocol)
  • Port: 69
  • Usage: Transfers files between clients and servers.

Default Ports for Databases

  1. MySQL
  • Port: 3306
  • Usage: Relational database management system.
  1. PostgreSQL
  • Port: 5432
  • Usage: Open-source relational database management system.
  1. MongoDB
  • Port: 27017
  • Usage: NoSQL database system.
  1. Oracle Database
  • Port: 1521
  • Usage: Proprietary relational database management system.

Conclusion

Default ports are crucial for establishing communication between various applications and databases over networks. Understanding these ports enables efficient network configuration and troubleshooting. Knowing the default ports for specific applications and databases aids in successful connectivity and data exchange.