Definition[edit]
port
- a place (seaport or airport) where people and merchandise can enter or leave a country
- sweet dark-red dessert wine originally from Portugal
- an opening (in a wall or ship or armored vehicle) for firing through
- interface: (computer science) computer circuit consisting of the hardware and associated circuitry that links one device with another (especially a computer and a hard disk drive or other peripherals)
Ports in Networking[edit]
In an IP network, a port number is used to identify a network service, which allows one physical computer to listen to various protocols at the same time. The possible range for port numbers is 1 to 65535. This divides up into:
1-1024 well known ports
1024-49151 registered and unregistered ports
49152-65535 private (or dynamic) ports
Well Known Ports[edit]
The well known ports are ports between 0 and 1024, assigned by the IANA and on most systems can only be used by system (or root) processes or by programs executed by privileged users.
To the extent possible, these same port assignments are used with the UDP (RFC 768).
17-110[edit]
ports 17-110 (most widely known, complete list below)
qotd 17/tcp Quote of the Day qotd 17/udp Quote of the Day
msp 18/tcp Message Send Protocol msp 18/udp Message Send Protocol
chargen 19/tcp Character Generator chargen 19/udp Character Generator
ftp-data 20/tcp File Transfer [Default Data] <-FTP ftp-data 20/udp File Transfer [Default Data] <-FTP
ftp 21/tcp File Transfer [Control] <-FTP ftp 21/udp File Transfer [Control] <-FTP
ssh 22/tcp SSH Remote Login Protocol <-SSH ssh 22/udp SSH Remote Login Protocol <-SSH
telnet 23/tcp Telnet <-Telnet telnet 23/udp Telnet <-Telnet
24 24/tcp any private mail system 24 24/udp any private mail system
smtp 25/tcp Simple Mail Transfer <-SMTP smtp 25/udp Simple Mail Transfer <-SMTP
# 26/tcp Unassigned # 26/udp Unassigned
nsw-fe 27/tcp NSW User System FE nsw-fe 27/udp NSW User System FE
# 28/tcp Unassigned # 28/udp Unassigned
msg-icp 29/tcp MSG ICP msg-icp 29/udp MSG ICP
# 30/tcp Unassigned # 30/udp Unassigned
msg-auth 31/tcp MSG Authentication msg-auth 31/udp MSG Authentication
# 32/tcp Unassigned # 32/udp Unassigned
dsp 33/tcp Display Support Protocol dsp 33/udp Display Support Protocol
# 34/tcp Unassigned # 34/udp Unassigned
35 35/tcp any private printer server 35 35/udp any private printer server
# 36/tcp Unassigned # 36/udp Unassigned
time 37/tcp Time time 37/udp Time
rap 38/tcp Route Access Protocol rap 38/udp Route Access Protocol
rlp 39/tcp Resource Location Protocol rlp 39/udp Resource Location Protocol
# 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]
ni-ftp 47/tcp NI FTP ni-ftp 47/udp NI FTP
auditd 48/tcp Digital Audit Daemon auditd 48/udp Digital Audit Daemon
tacacs 49/tcp Login Host Protocol (TACACS) tacacs 49/udp Login Host Protocol (TACACS)
re-mail-ck 50/tcp Remote Mail Checking Protocol re-mail-ck 50/udp Remote Mail Checking Protocol
la-maint 51/tcp IMP Logical Address Maintenance la-maint 51/udp IMP Logical Address Maintenance
xns-time 52/tcp XNS Time Protocol xns-time 52/udp XNS Time Protocol
domain 53/tcp Domain Name Server domain 53/udp Domain Name Server
xns-ch 54/tcp XNS Clearinghouse xns-ch 54/udp XNS Clearinghouse
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
57 57/tcp any private terminal access 57 57/udp any private terminal access
xns-mail 58/tcp XNS Mail xns-mail 58/udp XNS Mail
59 59/tcp any private file service 59 59/udp any private file service 60 60/tcp Unassigned 60 60/udp Unassigned
ni-mail 61/tcp NI MAIL ni-mail 61/udp NI MAIL
acas 62/tcp ACA Services acas 62/udp ACA Services
whois++ 63/tcp whois++ whois++ 63/udp whois++
covia 64/tcp Communications Integrator (CI) covia 64/udp Communications Integrator (CI)
tacacs-ds 65/tcp TACACS-Database Service tacacs-ds 65/udp TACACS-Database Service
sql*net 66/tcp Oracle SQL*NET sql*net 66/udp Oracle SQL*NET
bootps 67/tcp Bootstrap Protocol Server bootps 67/udp Bootstrap Protocol Server bootpc 68/tcp Bootstrap Protocol Client bootpc 68/udp Bootstrap Protocol Client
tftp 69/tcp Trivial File Transfer tftp 69/udp Trivial File Transfer
gopher 70/tcp Gopher gopher 70/udp Gopher
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
75 75/tcp any private dial out service 75 75/udp any private dial out service
deos 76/tcp Distributed External Object Store deos 76/udp Distributed External Object Store
77 77/tcp any private RJE service 77 77/udp any private RJE service
vettcp 78/tcp vettcp vettcp 78/udp vettcp
finger 79/tcp Finger finger 79/udp Finger
http 80/tcp World Wide Web HTTP <-HTTP http 80/udp World Wide Web HTTP <-HTTP www 80/tcp World Wide Web HTTP <-HTTP www 80/udp World Wide Web HTTP <-HTTP www-http 80/tcp World Wide Web HTTP <-HTTP www-http 80/udp World Wide Web HTTP <-HTTP
hosts2-ns 81/tcp HOSTS2 Name Server hosts2-ns 81/udp HOSTS2 Name Server
xfer 82/tcp XFER Utility xfer 82/udp XFER Utility
mit-ml-dev 83/tcp MIT ML Device mit-ml-dev 83/udp MIT ML Device
ctf 84/tcp Common Trace Facility ctf 84/udp Common Trace Facility
mit-ml-dev 85/tcp MIT ML Device mit-ml-dev 85/udp MIT ML Device
mfcobol 86/tcp Micro Focus Cobol mfcobol 86/udp Micro Focus Cobol
87 87/tcp any private terminal link 87 87/udp any private terminal link
kerberos 88/tcp Kerberos kerberos 88/udp Kerberos
su-mit-tg 89/tcp SU/MIT Telnet Gateway su-mit-tg 89/udp SU/MIT Telnet Gateway
########### PORT 90 also being used unofficially by Pointcast #########
dnsix 90/tcp DNSIX Securit Attribute Token Map dnsix 90/udp DNSIX Securit Attribute Token Map
mit-dov 91/tcp MIT Dover Spooler mit-dov 91/udp MIT Dover Spooler
npp 92/tcp Network Printing Protocol npp 92/udp Network Printing Protocol
dcp 93/tcp Device Control Protocol dcp 93/udp Device Control Protocol
objcall 94/tcp Tivoli Object Dispatcher objcall 94/udp Tivoli Object Dispatcher
supdup 95/tcp SUPDUP supdup 95/udp SUPDUP dixie 96/tcp DIXIE Protocol Specification dixie 96/udp DIXIE Protocol Specification
swift-rvf 97/tcp Swift Remote Virtural File Protocol swift-rvf 97/udp Swift Remote Virtural File Protocol
tacnews 98/tcp TAC News tacnews 98/udp TAC News
metagram 99/tcp Metagram Relay metagram 99/udp Metagram Relay
newacct 100/tcp [unauthorized use]
hostname 101/tcp NIC Host Name Server hostname 101/udp NIC Host Name Server
iso-tsap 102/tcp ISO-TSAP Class 0 iso-tsap 102/udp ISO-TSAP Class 0
gppitnp 103/tcp Genesis Point-to-Point Trans Net gppitnp 103/udp Genesis Point-to-Point Trans Net
acr-nema 104/tcp ACR-NEMA Digital Imag. & Comm. 300 acr-nema 104/udp ACR-NEMA Digital Imag. & Comm. 300
cso 105/tcp CCSO name server protocol
cso 105/udp CCSO name server protocol
csnet-ns 105/tcp Mailbox Name Nameserver
csnet-ns 105/udp Mailbox Name Nameserver
3com-tsmux 106/tcp 3COM-TSMUX 3com-tsmux 106/udp 3COM-TSMUX
########## 106 Unauthorized use by insecure poppassd protocol
rtelnet 107/tcp Remote Telnet Service rtelnet 107/udp Remote Telnet Service
snagas 108/tcp SNA Gateway Access Server snagas 108/udp SNA Gateway Access Server
pop2 109/tcp Post Office Protocol - Version 2 pop2 109/udp Post Office Protocol - Version 2
pop3 110/tcp Post Office Protocol - Version 3 <-POP3 pop3 110/udp Post Office Protocol - Version 3 <-POP3
Common but unregistered ports[edit]
The unregistered ports are ports above 1024 (up to 65535) that may be on common use but are not registered with the IANA.
All ports[edit]
see Category:Ports and help it grow.
External Links[edit]
Complete (long!) list here: