In TCP/IP and UDP networks, a port is
an endpoint to a logical
connection and the way a client program specifies a specific server program on
a computer in a network. Some ports have numbers that are preassigned
to them by the IANA,
and these are known as well-known ports (specified in RFC 1700). Port numbers
range from 0 to 65536, but only ports numbers 0 to 1024 are reserved for
privileged services and designated as well-known ports. This list of well-known
port numbers specifies the port used by the server process as its contact port.
Port Number |
Description |
1 |
TCP |
5 |
Remote Job Entry (RJE) |
7 |
ECHO |
18 |
Message Send Protocol (MSP) |
20 |
FTP -- Data |
21 |
FTP -- Control |
22 |
SSH Remote Login
Protocol |
23 |
|
25 |
|
29 |
MSG ICP |
37 |
Time |
42 |
Host Name Server (Nameserv) |
43 |
WhoIs |
49 |
Login Host Protocol (Login) |
53 |
Domain Name System
(DNS) |
69 |
|
70 |
Gopher Services |
79 |
|
80 |
|
103 |
X.400 Standard |
108 |
SNA Gateway Access Server |
109 |
POP2 |
110 |
|
115 |
Simple File Transfer
Protocol (SFTP) |
118 |
SQL Services |
119 |
Newsgroup (NNTP) |
137 |
NetBIOS Name
Service |
139 |
NetBIOS Datagram Service |
143 |
Interim Mail Access
Protocol (IMAP) |
150 |
NetBIOS Session Service |
156 |
|
161 |
|
179 |
Border Gateway Protocol
(BGP) |
190 |
Gateway Access Control
Protocol (GACP) |
194 |
Internet Relay Chat
(IRC) |
197 |
Directory Location Service
(DLS) |
389 |
|
396 |
Novell Netware over IP |
443 |
|
444 |
Simple Network Paging
Protocol (SNPP) |
445 |
Microsoft-DS |
458 |
Apple QuickTime |
546 |
DHCP Client |
547 |
DHCP Server |
563 |
SNEWS |
569 |
MSN |
1080 |
Socks |
For further information, see RFC 1700.