Port Number List PDF

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Port Number List

A port number is the logical address of each application or process that uses a network or the Internet to communicate. A port number uniquely identifies a network-based application on a computer. This number is assigned automatically by the OS, manually by the user or is set as a default for some popular applications

The port numbers are divided into three ranges: the well-known ports, the registered ports, and the dynamic or private ports. The registered ports are those from 1024 through 49151. IANA maintains the official list of well-known and registered ranges. The dynamic or private ports are those from 49152 through 65535.

Port Number List

  1. FTP (File Transfer Protocol):
    • Port 20: Data transfer
    • Port 21: Control (command)
  2. SSH (Secure Shell):
    • Port 22: Secure login
  3. Telnet:
    • Port 23: Unencrypted text communication
  4. SMTP (Simple Mail Transfer Protocol):
    • Port 25: Email transfer
  5. DNS (Domain Name System):
    • Port 53: Domain name resolution
  6. HTTP (Hypertext Transfer Protocol):
    • Port 80: Web traffic (unencrypted)
  7. HTTPS (Hypertext Transfer Protocol Secure):
    • Port 443: Secure web traffic (encrypted)
  8. SNMP (Simple Network Management Protocol):
    • Port 161: Network monitoring and management
  9. LDAP (Lightweight Directory Access Protocol):
    • Port 389: Directory services
  10. MySQL:
    • Port 3306: MySQL database
  11. RDP (Remote Desktop Protocol):
    • Port 3389: Remote desktop access
  12. FTP Secure (FTPS):
    • Port 989: FTPS protocol (data)
    • Port 990: FTPS protocol (control)
  13. SFTP (SSH File Transfer Protocol):
    • Port 22: Secure file transfer over SSH
  14. SMTPS (SMTP Secure):
    • Port 465: Encrypted SMTP
  15. POP3 (Post Office Protocol version 3):
    • Port 110: Email retrieval
  16. IMAP (Internet Message Access Protocol):
    • Port 143: Email retrieval
  17. IMAPS (IMAP Secure):
    • Port 993: Secure email retrieval
  18. NNTP (Network News Transfer Protocol):
    • Port 119: Usenet news
  19. NTP (Network Time Protocol):
    • Port 123: Time synchronization
  20. LDAP Secure (LDAPS):
    • Port 636: Encrypted LDAP

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