Common Network Ports

Common Network Ports

1. FTP

   • tcp/20, tcp21
     • Sends and receives files between systems
   • File Transfer Protocol

2. SSH

   • tcp/22
     • Secure Shell
       • Encrypted console access

3. Telnet

   • tcp/23
     • TelecommunicaCon Network
       • Insecure console access
   • suport SSH

4. SMTP

   • tcp/25
     • Simple Mail Transfer Protocol
       • Transfer email between mail servers
       • emails
         • POP3/IMAP

5. DNS

   • udp/53
     • Domain Name System
       • Convert domain names to IP addresses
         • www.porfessormesser.com=162.159.246.164

6. HTTP and HTTPS

   • tcp/80 and tcp/443
     • Hypertext Transfer Protocol
       • Web server communication

7. POP3

   • tcp/110
     • Post Office Protocol version 3
       • Receive email into a email client
         • basic mail transfer function

8. IMAP4

   • tcp/143
     • Internet Message Access Protocol v4
       • A newer email client protocol
         • inbox management multiple clients

9. RDP

   • tcp/3389
     • Remote Desktop Protocol
       • Graphical display of remote devices

10. NetBIOS

    • udp/137
      • NetBIOS name service
        • Register, remove, and find Windows services by name

11. NetBIOS

    • udp/138
      • NetBIOS datagram service

12. NetBIOS

    • tcp/139
      • NetBIOS session service
        • Windows connecCon-oriented data transfer

13. SMB

    • tcp/445
      • Server Message Block
        • Windows file transfers and printer sharing

14. AFP

    • tcp/548
      • Apple Filing Protocol
        • Mac OS file transfers

15. SLP

    • tcp/427, udp/427
      • Service LocaCon Protocol
        • Find Mac OS services by name

16. DHCP

    • udp/67, udp/68
      • Dynamic Host ConfiguraCon Protocol
        • Automate the IP address configuraCon process

17. LDAP

    • tcp/389
      • Lightweight Directory Access Protoco
        • Directory services
          • Microsoft Active Directory

18. SNMP

    • Queries: udp/161
      • Simple Network Management Protocol
        • Gather metrics and manage network devices
          • v1
            • Structure Tables
              • In-the-clear
          • v2
            • Data type enhancements
              • Bulk transfer (transferencia masiva)
                • transferencia masiva
                • Still In-the-clear
          • v3
            • Message integrity
              • Authentication
                • Encription
    • Traps: udp/162

19. UDP

    • User Datagram Protocol

20. TCP

    • Transmission Control Protocol