Billion Electric Company BiPAC 7300GX User Manual
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to 65535, but only port numbers 0 to 1023 are reserved for privileged services and are
designated as “well-known ports”. The registered ports are numbered from 1024 through
49151. The remaining ports, referred to as dynamic ports, or private ports, are numbered
from 49152 through 65535.
Examples of well-known and registered port numbers are shown below, for further
information, please see IANA’s website at:
http://www.iana.org/assignments/port-numbers
For help on determining which private port numbers are used by common applications on
this list, please see the FAQs (Frequently Asked Questions) at:
http://www.billion.com
Well-known and Registered Ports
Port Number
Protocol
Description
20 TCP FTP
Data
21 TCP FTP
Control
22
TCP & UDP
SSH Remote Login Protocol
23 TCP Telnet
25
TCP
SMTP (Simple Mail Transfer Protocol)
53
TCP & UDP
DNS (Domain Name Server)
69
UDP
TFTP (Trivial File Transfer Protocol)
80
TCP
World Wide Web HTTP
110
TCP
POP3 (Post Office Protocol Version 3)
119
TCP
NEWS (Network News Transfer Protocol)
123
UDP
NTP (Network Time Protocol)
161 TCP
SNMP
443
TCP & UDP
HTTPS
1503 TCP
T.120
1720 TCP
H.323
4000 TCP
ICQ
7070 UDP
RealAudio