Well-Known Port Numbers - Moxa Technologies MiiNePort E2-H User Manual

This appendix is included for your reference. Listed below are port numbers that already have a
well-established use. These port numbers should be avoided when assigning a port number to your MiiNePort
E2 Series module; otherwise you may experience network problems. Refer to the RFC 1700 standard for
Well-Known Port Numbers or refer to the following introduction from IANA.
• The port numbers are divided into three ranges: the Well-Known Ports, the Registered Ports, and the
Dynamic and/or Private Ports.
• The Well-Known Ports are those from 0 through 1023.
• The Registered Ports are those from 1024 through 49151.
• The Dynamic and/or Private Ports are those from 49152 through 65535.
The 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. The following table shows famous port numbers among the
well-known port numbers. For more details, visit the IANA website at
http://www.iana.org/assignments/port-numbers.
TCP Socket
0
1
2
7
9
11
13
15
20
21
23
25
37
42
43
49
53
79
80
119
123
213
160 – 223

Well-Known Port Numbers

B.
Application Service
reserved
TCP Port Service Multiplexor
Management Utility
Echo
Discard
Active Users (systat)
Daytime
Netstat
FTP data port
FTP CONTROL port
Telnet
SMTP (Simple Mail Transfer Protocol)
Time (Time Server)
Host name server (names server)
Whois (nickname)
(Login Host Protocol) (Login)
Domain Name Server (domain)
Finger protocol (Finger)
World Wide Web HTTP
Network News Transfer Protocol (NNTP)
Network Time Protocol
IPX
Reserved for future use
B