List of ports that are being used in Linux
The
following tables list the most common communication ports used by
services, daemons, and programs included in Red Hat Enterprise Linux.
This listing can also be found in the /etc/services file.
The
lists the Well Known Ports as defined by IANA and is used by Red Hat
Enterprise Linux as default communication ports for various services,
including FTP, SSH, and Samba.
Port
# / Layer
|
Name
|
Comment
|
|---|---|---|
1
|
tcpmux
|
TCP
port service multiplexer
|
5
|
rje
|
Remote
Job Entry
|
7
|
echo
|
Echo
service
|
9
|
discard
|
Null
service for connection testing
|
11
|
systat
|
System
Status service for listing connected ports
|
13
|
daytime
|
Sends
date and time to requesting host
|
17
|
qotd
|
Sends
quote of the day to connected host
|
18
|
msp
|
Message
Send Protocol
|
19
|
chargen
|
Character
Generation service; sends endless stream of characters
|
20
|
ftp-data
|
FTP
data port
|
21
|
ftp
|
File
Transfer Protocol (FTP) port; sometimes used by File Service
Protocol (FSP)
|
22
|
ssh
|
Secure
Shell (SSH) service
|
23
|
telnet
|
The
Telnet service
|
25
|
smtp
|
Simple
Mail Transfer Protocol (SMTP)
|
37
|
time
|
Time
Protocol
|
39
|
rlp
|
Resource
Location Protocol
|
42
|
nameserver
|
Internet
Name Service
|
43
|
nicname
|
WHOIS
directory service
|
49
|
tacacs
|
Terminal
Access Controller Access Control System for TCP/IP based
authentication and access
|
50
|
re-mail-ck
|
Remote
Mail Checking Protocol
|
53
|
domain
|
domain
name services (such as BIND)
|
63
|
whois++
|
WHOIS++,
extended WHOIS services
|
67
|
bootps
|
Bootstrap
Protocol (BOOTP) services; also used by Dynamic Host
Configuration Protocol (DHCP) services
|
68
|
bootpc
|
Bootstrap
(BOOTP) client; also used by Dynamic Host Control Protocol (DHCP)
clients
|
69
|
tftp
|
Trivial
File Transfer Protocol (TFTP)
|
70
|
gopher
|
Gopher
Internet document search and retrieval
|
71
|
netrjs-1
|
Remote
Job Service
|
72
|
netrjs-2
|
Remote
Job Service
|
73
|
netrjs-3
|
Remote
Job Service
|
73
|
netrjs-4
|
Remote
Job Service
|
79
|
finger
|
Finger
service for user contact information
|
80
|
http
|
HyperText
Transfer Protocol (HTTP) for World Wide Web (WWW) services
|
88
|
kerberos
|
Kerberos
network authentication system
|
95
|
supdup
|
Telnet
protocol extension
|
101
|
hostname
|
Hostname
services on SRI-NIC machines
|
102/tcp
|
iso-tsap
|
ISO
Development Environment (ISODE) network applications
|
105
|
csnet-ns
|
Mailbox
nameserver; also used by CSO nameserver
|
107
|
rtelnet
|
Remote
Telnet
|
109
|
pop2
|
Post
Office Protocol version 2
|
110
|
pop3
|
Post
Office Protocol version 3
|
111
|
sunrpc
|
Remote
Procedure Call (RPC) Protocol for remote command execution, used
by Network Filesystem (NFS)
|
113
|
auth
|
Authentication
and Ident protocols
|
115
|
sftp
|
Secure
File Transfer Protocol (SFTP) services
|
117
|
uucp-path
|
Unix-to-Unix
Copy Protocol (UUCP) Path services
|
119
|
nntp
|
Network
News Transfer Protocol (NNTP) for the USENET discussion system
|
123
|
ntp
|
Network
Time Protocol (NTP)
|
137
|
netbios-ns
|
NETBIOS
Name Service used in Red Hat Enterprise Linux by Samba
|
138
|
netbios-dgm
|
NETBIOS
Datagram Service used in Red Hat Enterprise Linux by Samba
|
139
|
netbios-ssn
|
NETBIOS
Session Service used in Red Hat Enterprise Linux by Samba
|
143
|
imap
|
Internet
Message Access Protocol (IMAP)
|
161
|
snmp
|
Simple
Network Management Protocol (SNMP)
|
162
|
snmptrap
|
Traps
for SNMP
|
163
|
cmip-man
|
Common
Management Information Protocol (CMIP)
|
164
|
cmip-agent
|
Common
Management Information Protocol (CMIP)
|
174
|
mailq
|
MAILQ
email transport queue
|
177
|
xdmcp
|
X
Display Manager Control Protocol (XDMCP)
|
178
|
nextstep
|
NeXTStep
window server
|
179
|
bgp
|
Border
Gateway Protocol
|
191
|
prospero
|
Prospero
distributed filesystem services
|
194
|
irc
|
Internet
Relay Chat (IRC)
|
199
|
smux
|
SNMP
UNIX Multiplexer
|
201
|
at-rtmp
|
AppleTalk
routing
|
202
|
at-nbp
|
AppleTalk
name binding
|
204
|
at-echo
|
AppleTalk
echo
|
206
|
at-zis
|
AppleTalk
zone information
|
209
|
qmtp
|
Quick
Mail Transfer Protocol (QMTP)
|
210
|
z39.50
|
NISO
Z39.50 database
|
213
|
ipx
|
Internetwork
Packet Exchange (IPX), a datagram protocol commonly used in
Novell Netware environments
|
220
|
imap3
|
Internet
Message Access Protocol version 3
|
245
|
link
|
LINK
/ 3-DNS iQuery service
|
347
|
fatserv
|
FATMEN
file and tape management server
|
363
|
rsvp_tunnel
|
RSVP
Tunnel
|
369
|
rpc2portmap
|
Coda
file system portmapper
|
370
|
codaauth2
|
Coda
file system authentication services
|
372
|
ulistproc
|
UNIX
LISTSERV
|
389
|
ldap
|
Lightweight
Directory Access Protocol (LDAP)
|
427
|
svrloc
|
Service
Location Protocol (SLP)
|
434
|
mobileip-agent
|
Mobile
Internet Protocol (IP) agent
|
435
|
mobilip-mn
|
Mobile
Internet Protocol (IP) manager
|
443
|
https
|
Secure
Hypertext Transfer Protocol (HTTP)
|
444
|
snpp
|
Simple
Network Paging Protocol
|
445
|
microsoft-ds
|
Server
Message Block (SMB) over TCP/IP
|
464
|
kpasswd
|
Kerberos
password and key changing services
|
468
|
photuris
|
Photuris
session key management protocol
|
487
|
saft
|
Simple
Asynchronous File Transfer (SAFT) protocol
|
488
|
gss-http
|
Generic
Security Services (GSS) for HTTP
|
496
|
pim-rp-disc
|
Rendezvous
Point Discovery (RP-DISC) for Protocol Independent Multicast
(PIM) services
|
500
|
isakmp
|
Internet
Security Association and Key Management Protocol (ISAKMP)
|
535
|
iiop
|
Internet
Inter-Orb Protocol (IIOP)
|
538
|
gdomap
|
GNUstep
Distributed Objects Mapper (GDOMAP)
|
546
|
dhcpv6-client
|
Dynamic
Host Configuration Protocol (DHCP) version 6 client
|
547
|
dhcpv6-server
|
Dynamic
Host Configuration Protocol (DHCP) version 6 Service
|
554
|
rtsp
|
Real
Time Stream Control Protocol (RTSP)
|
563
|
nntps
|
Network
News Transport Protocol over Secure Sockets Layer (NNTPS)
|
565
|
whoami
|
whoami
user ID listing
|
587
|
submission
|
Mail
Message Submission Agent (MSA)
|
610
|
npmp-local
|
Network
Peripheral Management Protocol (NPMP) local / Distributed
Queueing System (DQS)
|
611
|
npmp-gui
|
Network
Peripheral Management Protocol (NPMP) GUI / Distributed Queueing
System (DQS)
|
612
|
hmmp-ind
|
HyperMedia
Management Protocol (HMMP) Indication / DQS
|
631
|
ipp
|
Internet
Printing Protocol (IPP)
|
636
|
ldaps
|
Lightweight
Directory Access Protocol over Secure Sockets Layer (LDAPS)
|
674
|
acap
|
Application
Configuration Access Protocol (ACAP)
|
694
|
ha-cluster
|
Heartbeat
services for High-Availability Clusters
|
749
|
kerberos-adm
|
Kerberos
version 5 (v5) 'kadmin' database administration
|
750
|
kerberos-iv
|
Kerberos
version 4 (v4) services
|
765
|
webster
|
Network
Dictionary
|
767
|
phonebook
|
Network
Phonebook
|
873
|
rsync
|
rsync
file transfer services
|
992
|
telnets
|
Telnet
over Secure Sockets Layer (TelnetS)
|
993
|
imaps
|
Internet
Message Access Protocol over Secure Sockets Layer (IMAPS)
|
994
|
ircs
|
Internet
Relay Chat over Secure Sockets Layer (IRCS)
|
995
|
pop3s
|
Post
Office Protocol version 3 over Secure Sockets Layer (POP3S)
|
The
lists UNIX-specific ports and cover services ranging from email to
authentication and more. Names enclosed in brackets (for example,
[service]) are either daemon names for the service or common
alias(es).
Port
# / Layer
|
Name
|
Comment
|
|---|---|---|
512/tcp
|
exec
|
Authentication
for remote process execution
|
512/udp
|
biff
[comsat]
|
Asynchrous
mail client (biff) and service (comsat)
|
513/tcp
|
login
|
Remote
Login (rlogin)
|
513/udp
|
who
[whod]
|
whod
user logging daemon
|
514/tcp
|
shell
[cmd]
|
Remote
shell (rshell) and remote copy (rcp) with no logging
|
514/udp
|
syslog
|
UNIX
system logging service
|
515
|
printer
[spooler]
|
Line
printer (lpr) spooler
|
517/udp
|
talk
|
Talk
remote calling service and client
|
518/udp
|
ntalk
|
Network
talk (ntalk) remote calling service and client
|
519
|
utime
[unixtime]
|
UNIX
time (utime) protocol
|
520/tcp
|
efs
|
Extended
Filename Server (EFS)
|
520/udp
|
router
[route, routed]
|
Routing
Information Protocol (RIP)
|
521
|
ripng
|
Routing
Information Protocol for Internet Protocol version 6 (IPv6)
|
525
|
timed
[timeserver]
|
Time
daemon (timed)
|
526/tcp
|
tempo
[newdate]
|
Tempo
|
530/tcp
|
courier
[rpc]
|
Courier
Remote Procedure Call (RPC) protocol
|
531/tcp
|
conference
[chat]
|
Internet
Relay Chat
|
532
|
netnews
|
Netnews
newsgroup service
|
533/udp
|
netwall
|
Netwall
for emergency broadcasts
|
540/tcp
|
uucp
[uucpd]
|
UNIX-to-UNIX
copy services
|
543/tcp
|
klogin
|
Kerberos
version 5 (v5) remote login
|
544/tcp
|
kshell
|
Kerberos
version 5 (v5) remote shell
|
548
|
afpovertcp
|
Appletalk
Filing Protocol (AFP) over Transmission Control Protocol (TCP)
|
556
|
remotefs
[rfs_server, rfs]
|
Brunhoff's
Remote Filesystem (RFS)
|
The
lists ports submitted by the network and software community to the
IANA for formal registration into the port number list.
Here
is a listing of ports related to the Datagram Delivery Protocol (DDP)
used on AppleTalk networks.
Port
# / Layer
|
Name
|
Comment
|
|---|---|---|
1/ddp
|
rtmp
|
Routing
Table Management Protocol
|
2/ddp
|
nbp
|
Name
Binding Protocol
|
4/ddp
|
echo
|
AppleTalk
Echo Protocol
|
6/ddp
|
zip
|
Zone
Information Protocol
|
Here
is a listing of ports related to the Kerberos network authentication
protocol. Where noted, v5 refers to the Kerberos version 5 protocol.
Note that these ports are not registered with the IANA.
Port
# / Layer
|
Name
|
Comment
|
|---|---|---|
751
|
kerberos_master
|
Kerberos
authentication
|
752
|
passwd_server
|
Kerberos
Password (kpasswd) server
|
754
|
krb5_prop
|
Kerberos
v5 slave propagation
|
760
|
krbupdate
[kreg]
|
Kerberos
registration
|
1109
|
kpop
|
Kerberos
Post Office Protocol (KPOP)
|
2053
|
knetd
|
Kerberos
de-multiplexor
|
2105
|
eklogin
|
Kerberos
v5 encrypted remote login (rlogin)
|
Here
is a listing of unregistered ports that are used by services and
protocols that may be installed on your Red Hat Enterprise Linux
system, or that is necessary for communication between Red Hat
Enterprise Linux and other operating systems.
Port
# / Layer
|
Name
|
Comment
|
|---|---|---|
15/tcp
|
netstat
|
Network
Status (netstat)
|
98/tcp
|
linuxconf
|
Linuxconf
Linux administration tool
|
106
|
poppassd
|
Post
Office Protocol password change daemon (POPPASSD)
|
465/tcp
|
smtps
|
Simple
Mail Transfer Protocol over Secure Sockets Layer (SMTPS)
|
616/tcp
|
gii
|
Gated
(routing daemon) Interactive Interface
|
808
|
omirr
[omirrd]
|
Online
Mirror (Omirr) file mirroring services
|
871/tcp
|
supfileserv
|
Software
Upgrade Protocol (SUP) server
|
901/tcp
|
swat
|
Samba
Web Administration Tool (SWAT)
|
953
|
rndc
|
Berkeley
Internet Name Domain version 9 (BIND 9) remote configuration tool
|
1127/tcp
|
supfiledbg
|
Software
Upgrade Protocol (SUP) debugging
|
1178/tcp
|
skkserv
|
Simple
Kana to Kanji (SKK) Japanese input server
|
1313/tcp
|
xtel
|
French
Minitel text information system
|
1529/tcp
|
support
[prmsd, gnatsd]
|
GNATS
bug tracking system
|
2003/tcp
|
cfinger
|
GNU
finger
|
2150
|
ninstall
|
Network
Installation Service
|
2988
|
afbackup
|
afbackup
client-server backup system
|
3128/tcp
|
squid
|
Squid
Web proxy cache
|
3455
|
prsvp
|
RSVP
port
|
5432
|
postgres
|
PostgreSQL
database
|
4557/tcp
|
fax
|
FAX
transmission service (old service)
|
4559/tcp
|
hylafax
|
HylaFAX
client-server protocol (new service)
|
5232
|
sgi-dgl
|
SGI
Distributed Graphics Library
|
5354
|
noclog
|
NOCOL
network operation center logging daemon (noclogd)
|
5355
|
hostmon
|
NOCOL
network operation center host monitoring
|
5680/tcp
|
canna
|
Canna
Japanese character input interface
|
6010/tcp
|
x11-ssh-offset
|
Secure
Shell (SSH) X11 forwarding offset
|
6667
|
ircd
|
Internet
Relay Chat daemon (ircd)
|
7100/tcp
|
xfs
|
X
Font Server (XFS)
|
7666/tcp
|
tircproxy
|
Tircproxy
IRC proxy service
|
8008
|
http-alt
|
Hypertext
Tranfer Protocol (HTTP) alternate
|
8080
|
webcache
|
World
Wide Web (WWW) caching service
|
8081
|
tproxy
|
Transparent
Proxy
|
9100/tcp
|
jetdirect
[laserjet, hplj]
|
Hewlett-Packard
(HP) JetDirect network printing service
|
9359
|
mandelspawn
[mandelbrot]
|
Parallel
mandelbrot spawning program for the X Window System
|
10081
|
kamanda
|
Amanda
backup service over Kerberos
|
10082/tcp
|
amandaidx
|
Amanda
index server
|
10083/tcp
|
amidxtape
|
Amanda
tape server
|
20011
|
isdnlog
|
Integrated
Services Digital Network (ISDN) logging system
|
20012
|
vboxd
|
ISDN
voice box daemon (vboxd)
|
22305/tcp
|
wnn4_Kr
|
kWnn
Korean input system
|
22289/tcp
|
wnn4_Cn
|
cWnn
Chinese input system
|
22321/tcp
|
wnn4_Tw
|
tWnn
Chinese input system (Taiwan)
|
24554
|
binkp
|
Binkley
TCP/IP Fidonet mailer daemon
|
27374
|
asp
|
Address
Search Protocol
|
60177
|
tfido
|
Ifmail
FidoNet compatible mailer service
|
60179
|
fido
|
FidoNet
electronic mail and news network
|
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