port-numbers

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PORT NUMBERS

(last updated 2001 Jul 25)

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:

Keyword         Decimal    Description                     Refrences
-------         -------    -----------                     ----------
                  0/tcp    Reserved
                  0/udp    Reserved
#                          Jon Postel <[e-mail]>
tcpmux            1/tcp    TCP Port Service Multiplexer
tcpmux            1/udp    TCP Port Service Multiplexer
#                          Mark Lottor <[e-mail]>
compressnet       2/tcp    Management Utility
compressnet       2/udp    Management Utility
compressnet       3/tcp    Compression Process
compressnet       3/udp    Compression Process
#                          Bernie Volz <[e-mail]>
#                 4/tcp    Unassigned
#                 4/udp    Unassigned
rje               5/tcp    Remote Job Entry
rje               5/udp    Remote Job Entry
#                          Jon Postel <[e-mail]>
#                 6/tcp    Unassigned
#                 6/udp    Unassigned
echo              7/tcp    Echo
echo              7/udp    Echo
#                          Jon Postel <[e-mail]>
#                 8/tcp    Unassigned
#                 8/udp    Unassigned
discard           9/tcp    Discard
discard           9/udp    Discard
#                          Jon Postel <[e-mail]>
#                10/tcp    Unassigned
#                10/udp    Unassigned
systat           11/tcp    Active Users
systat           11/udp    Active Users
#                          Jon Postel <[e-mail]>
#                12/tcp    Unassigned
#                12/udp    Unassigned
daytime          13/tcp    Daytime (RFC 867)
daytime          13/udp    Daytime (RFC 867)
#                          Jon Postel <[e-mail]>
#                14/tcp    Unassigned
#                14/udp    Unassigned
#                15/tcp    Unassigned [was netstat]
#                15/udp    Unassigned
#                16/tcp    Unassigned
#                16/udp    Unassigned
qotd             17/tcp    Quote of the Day
qotd             17/udp    Quote of the Day
#                          Jon Postel <[e-mail]>
msp              18/tcp    Message Send Protocol
msp              18/udp    Message Send Protocol
#                          Rina Nethaniel <---none--->
chargen          19/tcp    Character Generator
chargen          19/udp    Character Generator
ftp-data         20/tcp    File Transfer [Default Data]
ftp-data         20/udp    File Transfer [Default Data]
ftp              21/tcp    File Transfer [Control]
ftp              21/udp    File Transfer [Control]
#                          Jon Postel <[e-mail]>
ssh              22/tcp    SSH Remote Login Protocol
ssh              22/udp    SSH Remote Login Protocol
#                          Tatu Ylonen <[e-mail]>
telnet           23/tcp    Telnet
telnet           23/udp    Telnet
#                          Jon Postel <[e-mail]>
                 24/tcp    any private mail system
                 24/udp    any private mail system
#                          Rick Adams <[e-mail]>
smtp             25/tcp    Simple Mail Transfer
smtp             25/udp    Simple Mail Transfer
#                          Jon Postel <[e-mail]>
#                26/tcp    Unassigned
#                26/udp    Unassigned
nsw-fe           27/tcp    NSW User System FE
nsw-fe           27/udp    NSW User System FE
#                          Robert Thomas <[e-mail]>
#                28/tcp    Unassigned
#                28/udp    Unassigned
msg-icp          29/tcp    MSG ICP
msg-icp          29/udp    MSG ICP
#                          Robert Thomas <[e-mail]>
#                30/tcp    Unassigned
#                30/udp    Unassigned
msg-auth         31/tcp    MSG Authentication
msg-auth         31/udp    MSG Authentication
#                          Robert Thomas <[e-mail]>
#                32/tcp    Unassigned
#                32/udp    Unassigned
dsp              33/tcp    Display Support Protocol
dsp              33/udp    Display Support Protocol
#                          Ed Cain <[e-mail]>
#                34/tcp    Unassigned
#                34/udp    Unassigned
                 35/tcp    any private printer server
                 35/udp    any private printer server
#                          Jon Postel <[e-mail]>
#                36/tcp    Unassigned
#                36/udp    Unassigned
time             37/tcp    Time
time             37/udp    Time
#                          Jon Postel <[e-mail]>
rap              38/tcp    Route Access Protocol
rap              38/udp    Route Access Protocol
#                          Robert Ullmann <[e-mail]>
rlp              39/tcp    Resource Location Protocol
rlp              39/udp    Resource Location Protocol
#                          Mike Accetta <[e-mail]>
#                40/tcp    Unassigned
#                40/udp    Unassigned
graphics         41/tcp    Graphics
graphics         41/udp    Graphics
name             42/tcp    Host Name Server
name             42/udp    Host Name Server
nameserver       42/tcp    Host Name Server
nameserver       42/udp    Host Name Server
nicname          43/tcp    Who Is
nicname          43/udp    Who Is
mpm-flags        44/tcp    MPM FLAGS Protocol
mpm-flags        44/udp    MPM FLAGS Protocol
mpm              45/tcp    Message Processing Module [recv]
mpm              45/udp    Message Processing Module [recv]
mpm-snd          46/tcp    MPM [default send]
mpm-snd          46/udp    MPM [default send]
#                          Jon Postel <[e-mail]>
ni-ftp           47/tcp    NI FTP
ni-ftp           47/udp    NI FTP
#                          Steve Kille <[e-mail]>
auditd           48/tcp    Digital Audit Daemon
auditd           48/udp    Digital Audit Daemon
#                          Larry Scott <[e-mail]>
tacacs           49/tcp    Login Host Protocol (TACACS)
tacacs           49/udp    Login Host Protocol (TACACS)
#                          Pieter Ditmars <[e-mail]>
re-mail-ck       50/tcp    Remote Mail Checking Protocol
re-mail-ck       50/udp    Remote Mail Checking Protocol
#                          Steve Dorner <[e-mail]>
la-maint         51/tcp    IMP Logical Address Maintenance
la-maint         51/udp    IMP Logical Address Maintenance
#                          Andy Malis <[e-mail]>
xns-time         52/tcp    XNS Time Protocol
xns-time         52/udp    XNS Time Protocol
#                          Susie Armstrong <Armstrong.wbst128@XEROX>
domain           53/tcp    Domain Name Server
domain           53/udp    Domain Name Server
#                          Paul Mockapetris <[e-mail]>
xns-ch           54/tcp    XNS Clearinghouse
xns-ch           54/udp    XNS Clearinghouse
#                          Susie Armstrong <Armstrong.wbst128@XEROX>
isi-gl           55/tcp    ISI Graphics Language
isi-gl           55/udp    ISI Graphics Language
xns-auth         56/tcp    XNS Authentication
xns-auth         56/udp    XNS Authentication
#                          Susie Armstrong <Armstrong.wbst128@XEROX>
                 57/tcp    any private terminal access
                 57/udp    any private terminal access
#                          Jon Postel <[e-mail]>
xns-mail         58/tcp    XNS Mail
xns-mail         58/udp    XNS Mail
#                          Susie Armstrong <Armstrong.wbst128@XEROX>
                 59/tcp    any private file service
                 59/udp    any private file service
#                          Jon Postel <[e-mail]>
                 60/tcp    Unassigned
                 60/udp    Unassigned
ni-mail          61/tcp    NI MAIL
ni-mail          61/udp    NI MAIL
#                          Steve Kille <[e-mail]>
acas             62/tcp    ACA Services
acas             62/udp    ACA Services
#                          E. Wald <[e-mail]>
whois++          63/tcp    whois++
whois++          63/udp    whois++
#                          Rickard Schoultz <[e-mail]>
covia            64/tcp    Communications Integrator (CI)
covia            64/udp    Communications Integrator (CI)
#                          Dan Smith <[e-mail]>
tacacs-ds        65/tcp    TACACS-Database Service
tacacs-ds        65/udp    TACACS-Database Service
#                          Kathy Huber <[e-mail]>
sql*net          66/tcp    Oracle SQL*NET
sql*net          66/udp    Oracle SQL*NET
#                          Jack Haverty <[e-mail]>
bootps           67/tcp    Bootstrap Protocol Server
bootps           67/udp    Bootstrap Protocol Server
bootpc           68/tcp    Bootstrap Protocol Client
bootpc           68/udp    Bootstrap Protocol Client
#                          Bill Croft <[e-mail]>
tftp             69/tcp    Trivial File Transfer
tftp             69/udp    Trivial File Transfer
#                          David Clark <[e-mail]>
gopher           70/tcp    Gopher
gopher           70/udp    Gopher
#                          Mark McCahill <[e-mail]>
netrjs-1         71/tcp    Remote Job Service
netrjs-1         71/udp    Remote Job Service
netrjs-2         72/tcp    Remote Job Service
netrjs-2         72/udp    Remote Job Service
netrjs-3         73/tcp    Remote Job Service
netrjs-3         73/udp    Remote Job Service
netrjs-4         74/tcp    Remote Job Service
netrjs-4         74/udp    Remote Job Service
#                          Bob Braden <[e-mail]>
                 75/tcp    any private dial out service
                 75/udp    any private dial out service
#                          Jon Postel <[e-mail]>
deos             76/tcp    Distributed External Object Store
deos             76/udp    Distributed External Object Store
#                          Robert Ullmann <[e-mail]>
                 77/tcp    any private RJE service
                 77/udp    any private RJE service
#                          Jon Postel <[e-mail]>
vettcp           78/tcp    vettcp
vettcp           78/udp    vettcp
#                          Christopher Leong <[e-mail]>
finger           79/tcp    Finger
finger           79/udp    Finger
#                          David Zimmerman <[e-mail]>
http             80/tcp    World Wide Web HTTP
http             80/udp    World Wide Web HTTP
www              80/tcp    World Wide Web HTTP
www              80/udp    World Wide Web HTTP
www-http         80/tcp    World Wide Web HTTP
www-http         80/udp    World Wide Web HTTP
#                          Tim Berners-Lee <[e-mail]>
hosts2-ns        81/tcp    HOSTS2 Name Server
hosts2-ns        81/udp    HOSTS2 Name Server
#                          Earl Killian <[e-mail]>
xfer             82/tcp    XFER Utility
xfer             82/udp    XFER Utility
#                          Thomas M. Smith <[e-mail]>
mit-ml-dev       83/tcp    MIT ML Device
mit-ml-dev       83/udp    MIT ML Device
#                          David Reed <--none--->
ctf              84/tcp    Common Trace Facility
ctf              84/udp    Common Trace Facility