SENA PS810 - Manual (Page 97)

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Appendix 3. Well-known Port Numbers
Port numbers are divided into three ranges: Well Known Ports, Registered Ports, and Dynamic and/or
Private Ports. Well Known Ports are those from 0 through 1023. Registered Ports are those from 1024
through 49151. Dynamic and/or Private Ports are those from 49152 through 65535.
Well Known Ports are assigned by IANA, and on most systems, can only be used by system
processes or by programs executed by privileged users. Table A-3 shows some of the well-known port
numbers. For more details, please visit the IANA website: http://www.iana.org/assignments/port-
numbers
Table A-3 Well-known port numbers
Port number Protocol TCP/UDP
21 FTP (File Transfer Protocol) TCP
22 SSH (Secure Shell) TCP
23 Telnet TCP
25 SMTP (Simple Mail Transfer Protocol) TCP
37 Time TCP, UDP
39 RLP (Resource Location Protocol) UDP
49 TACACS, TACACS+ UDP
53 DNS UDP
67 BOOTP server UDP
68 BOOTP client UDP
69 TFTP UDP
70 Gopher TCP
79 Finger TCP
80 HTTP TCP
110 POP3 TCP
119 NNTP (Network News Transfer Protocol) TCP
161/162 SNMP UDP
443 HTTPS TCP