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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
WELL
KNOWN PORT NUMBERS
The Well Known Ports are assigned by the IANA and on most
systems can only be used by system (or root) processes or by
programs executed by privileged users.
Ports are used in the TCP [RFC793] to name the ends of
logical connections which carry long term conversations. For the
purpose of providing services to unknown callers, a service contact
port is defined. This list specifies the port used by the server
process as its contact port. The contact port is sometimes called
the "well-known port".
To the extent possible, these same port assignments are
used with the UDP [RFC768].
The range for assigned ports managed by the IANA is 0-1023.
Port Assignments
for Well Known Ports:
|
Port |
UDP |
TCP |
Definition |
|
7 |
x |
x |
echo |
|
9 |
x |
x |
discard |
|
11 |
x |
x |
systat |
|
13 |
x |
x |
daytime |
|
17 |
x |
x |
quote
of the day |
|
19 |
|
x |
character generator |
|
20 |
|
x |
ftp -
data |
|
21 |
|
x |
ftp -
control |
|
23 |
|
x |
telnet |
|
25 |
|
x |
smtp
mail transfer |
|
37 |
x |
x |
timeserver |
|
39 |
x |
|
rlp
resource location |
|
42 |
x |
x |
nameserver |
|
43 |
|
x |
nicname whois |
|
53 |
x |
x |
dommainlein name server |
|
67 |
x |
|
bootpc bootstrap protocol |
|
68 |
x |
|
bootpc bootstrap protocol |
|
69 |
x |
|
tftp
trivial file transfer |
|
70 |
|
x |
gopher |
|
79 |
|
x |
finger |
|
80 |
|
x |
http |
|
88 |
x |
x |
kerberos |
|
101 |
|
x |
hostname nic |
|
102 |
|
x |
iso-tsap class 0 |
|
107 |
|
x |
rtelnet |
|
109 |
|
x |
pop2 |
|
110 |
|
x |
pop3 |
|
111 |
x |
x |
sunrpc |
|
113 |
|
x |
identification protocol |
|
117 |
|
x |
uucp |
|
119 |
|
x |
nntp |
|
123 |
x |
|
ntp |
|
135 |
x |
x |
epmap |
|
137 |
x |
x |
netbios - name service |
|
138 |
x |
|
netbios - dgm |
|
139 |
|
x |
netbios - ssn |
|
143 |
|
x |
imap |
|
158 |
|
x |
pcmail - srv |
|
161 |
x |
|
snmp |
|
162 |
x |
|
snmptrap |
|
170 |
|
x |
print
- srv |
|
179 |
|
x |
border gateway protocol |
|
194 |
|
x |
irc
internet relay chat |
|
213 |
x |
|
ipx |
|
389 |
|
x |
ldap |
|
443 |
x |
x |
https
(ssl) |
|
445 |
x |
x |
microsoft - ds |
|
464 |
x |
x |
kpasswd |
|
500 |
x |
|
isakmp key exchange |
|
512 |
x |
x |
remote execute |
|
513 |
x |
x |
login
/ who |
|
514 |
x |
x |
shell
cmd / syslog |
|
515 |
|
x |
printer spooler |
|
517 |
x |
|
talk |
|
518 |
x |
|
ntalk |
|
520 |
x |
x |
router / efs |
|
525 |
x |
|
timeserver |
|
526 |
|
x |
tempo |
|
530 |
|
x |
rpc |
|
531 |
|
x |
conference chat |
|
532 |
|
x |
netnews newsreader |
|
533 |
x |
|
netwall |
|
540 |
|
x |
uucp |
|
543 |
|
x |
klogin |
|
544 |
|
x |
kshell |
|
550 |
x |
|
new -
rwho |
|
556 |
|
x |
remotefs |
|
560 |
x |
|
rmonitor |
|
561 |
x |
|
monitor |
|
636 |
|
x |
ldaps
over tls/ssl |
|
666 |
x |
x |
doom
id software |
|
749 |
x |
x |
kerberos administration |
|
750 |
x |
|
kerveros version iv |
|
1109 |
|
x |
kpop |
|
1167 |
x |
|
phone |
|
1433 |
x |
x |
ms -
sql - server |
|
1434 |
x |
x |
ms -
sql - monitor |
|
1512 |
x |
x |
wins |
|
1524 |
|
x |
ingreslock |
|
1701 |
x |
|
l2tp |
|
1723 |
|
x |
pptp
point to point |
|
1812 |
x |
|
radius authentication |
|
1813 |
x |
|
radius accounting |
|
2049 |
x |
|
nfs
server |
|
2053 |
|
x |
kerberos de - multiplexor |
|
9535 |
|
x |
man
remote server |
|