Well-Known Port Numbers - Moxa Technologies NPort 5000 Series User Manual

In this appendix, which is included for your reference, we provide a list of well-known port numbers that
may cause network problems if you set the NPort to one of these ports. Refer to RFC 1700 for well-known
port numbers, or refer to the following introduction from the 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 range from 0 through 1023.
The Registered Ports range from 1024 through 49151.
•
• The Dynamic and/or Private Ports range from 49152 through 65535.
The well-known ports are assigned by the 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, please 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
NPort 5000 Series User Manual
C. Well-Known Port Numbers
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
188