Port Numbers - Associated Protocol
Port Number Protocol
21 TCP FTP (File Transfer Protocol)
22 TCP SSH (Secure Shell)
22 TCP SCP (Secure Copy Protocol)
22 TCP SFTP (Secure File Transfer Protocol)
23 TCP Telnet
25 TCP SMTP (Simple Mail Transfer Protocol)
53 TCP / UDP DNS (Domain Name System)
67 UDP DHCP (Dynamic Host Configuration Protocol - server)
68 UDP DHCP (Dynamic Host Configuration Protocol - client)
69 UDP / TCP TFTP (Trivial File Transfer Protocol)
80 TCP HTTP (Hypertext Transfer Protocol)
110 TCP POP (Post Office Protocol)
135 TCP /UDP RPC (Remote Procedure Call)
139 TCP NetBIOS (MS file sharing port - legacy)
143 TCP IMAP (Internet Message Access Protocol)
161 UDP SNMP (Simple Network Management Protocol)
443 TCP HTTPS (Hypertext Transfer Protocol Secure)
445 TCP SMB (Server Message Block)
587 TCP SMTPS (Simple Mail Transfer Protocol Secure)
1812 UDP RADIUS (Remote Authentication Dial-in User Service)
3389 TCP RDP (Remote Desktop Protocol)
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