0
TCP
Programming technique for specifying system-allocated (dynamic) ports[ 2]
Unofficial
0
UDP
Reserved
Official
1
TCP
UDP
TCP Port Service Multiplexer (TCPMUX)Official
2
TCP
UDP
CompressNET[ 3] [ 4]
Official
3
TCP
UDP
CompressNET[ 3] [ 5]
Official
4
TCP
UDP
Unassigned
Official
5
TCP
UDP
Remote Job Entry Official
6
TCP
UDP
Unassigned
Official
7
TCP
UDP
Echo Protocol Official
8
TCP
UDP
Unassigned
Official
9
TCP
UDP
Discard Protocol Official
9
UDP
Wake-on-LAN Unofficial
10
TCP
UDP
Unassigned
Official
11
TCP
UDP
Active Users (systat service)[ 6] [ 7]
Official
12
TCP
UDP
Unassigned
Official
13
TCP
UDP
Daytime Protocol (RFC 867 )Official
14
TCP
UDP
Unassigned
Official
15
TCP
UDP
Previously netstat service[ 6]
Unofficial
16
TCP
UDP
Unassigned
Official
17
TCP
UDP
Quote of the Day Official
18
TCP
UDP
Message Send Protocol Official
19
TCP
UDP
Character Generator Protocol (CHARGEN)Official
20
TCP
UDP
FTP data transferOfficial
21
TCP
FTP control (command)Official
22
TCP
UDP
Secure Shell (SSH) — used for secure logins, file transfers (scp , sftp ) and port forwardingOfficial
23
TCP
UDP
Telnet protocol—unencrypted text communicationsOfficial
24
TCP
UDP
Priv-mail : any private mail system.
Official
25
TCP
Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail serversOfficial
26
TCP
UDP
encrypted SMTP
Official
27
TCP
UDP
NSW User System FE
Official
29
TCP
UDP
MSG ICP
Official
33
TCP
UDP
Display Support Protocol
Official
35
TCP
UDP
Any private printer server protocol
Official
37
TCP
UDP
TIME protocol Official
39
TCP
UDP
Resource Location Protocol[ 8] services from hosts on a network
Official
40
TCP
UDP
Unassigned
Official
42
TCP
UDP
ARPA Host Name Server Protocol Official
42
TCP
UDP
Windows Internet Name Service Unofficial
43
TCP
WHOIS protocolOfficial
47
TCP
UDP
NI FTP[ 8]
Official
49
TCP
UDP
TACACS Login Host protocolOfficial
50
TCP
UDP
Remote Mail Checking Protocol[ 9]
Official
51
TCP
UDP
IMP Logical Address Maintenance
Official
52
TCP
UDP
XNS (Xerox Network Systems ) Time Protocol
Official
53
TCP
UDP
Domain Name System (DNS)Official
54
TCP
UDP
XNS (Xerox Network Systems ) Clearinghouse
Official
55
TCP
UDP
ISI Graphics Language (ISI-GL)Official
56
TCP
UDP
XNS (Xerox Network Systems ) Authentication
Official
56
TCP
UDP
Route Access Protocol (RAP)[ 10]
Unofficial
57
TCP
Mail Transfer Protocol (RFC 780 )Official
58
TCP
UDP
XNS (Xerox Network Systems ) Mail
Official
64
TCP
UDP
CI (Travelport ) (formerly Covia) Comms Integrator
Official
67
UDP
Bootstrap Protocol (BOOTP) Server; also used by Dynamic Host Configuration Protocol (DHCP)Official
68
UDP
Bootstrap Protocol (BOOTP) Client; also used by Dynamic Host Configuration Protocol (DHCP)Official
69
UDP
Trivial File Transfer Protocol (TFTP)Official
70
TCP
Gopher protocolOfficial
71
TCP
NETRJS protocolOfficial
72
TCP
NETRJS protocolOfficial
73
TCP
NETRJS protocolOfficial
74
TCP
NETRJS protocolOfficial
77
TCP
UDP
Any private Remote Job Entry
Official
79
TCP
Finger protocol Official
80
TCP
Hypertext Transfer Protocol (HTTP)[ 11] Official
81
TCP
Torpark —Onion routing Unofficial
82
UDP
Torpark —ControlUnofficial
88
TCP
UDP
Kerberos —authentication systemOfficial
90
TCP
UDP
dnsix (DoD Network Security for Information Exchange) Securit Attribute Token Map
Official
90
TCP
UDP
PointCast (dotcom) Unofficial
99
TCP
WIP Message protocolUnofficial
100
UDP
CyberGate RAT protocol
Unofficial
101
TCP
NIC host name Official
102
TCP
ISO -TSAP (Transport Service Access Point) Class 0 protocol;[ 12] Digital Equipment Corporation DECnet (Phase V+) over TCP/IPOfficial
104
TCP
UDP
ACR /NEMA Digital Imaging and Communications in Medicine (DICOM)Official
105
TCP
UDP
CCSO Nameserver Protocol (Qi/Ph) Official
107
TCP
Remote TELNET Service[ 13]
Official
108
TCP
UDP
SNA Gateway Access Server [ 1] Official
109
TCP
Post Office Protocol v2 (POP2)Official
110
TCP
Post Office Protocol v3 (POP3)Official
111
TCP
UDP
ONC RPC (Sun RPC )Official
113
TCP
Ident —Authentication Service/Identification Protocol,[ 14] IRC servers to identify usersOfficial
113
UDP
Authentication Service[ 14]
Official
115
TCP
Simple File Transfer Protocol (SFTP)Official
117
STD
UUCP Path Service Official
118
TCP
UDP
SQL (Structured Query Language) ServicesOfficial
119
TCP
Network News Transfer Protocol (NNTP)—retrieval of newsgroup messagesOfficial
123
UDP
Network Time Protocol (NTP)—used for time synchronizationOfficial
126
TCP
UDP
Formerly Unisys Unitary Login, renamed by Unisys to NXEdit. Used by Unisys Programmer's Workbench for Clearpath MCP, an IDE for Unisys MCP software development
Official
135
TCP
UDP
DCE endpoint resolutionOfficial
135
TCP
UDP
Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service,[ 15] DHCP server , DNS server and WINS . Also used by DCOM Unofficial
137
TCP
UDP
NetBIOS NetBIOS Name ServiceOfficial
138
TCP
UDP
NetBIOS NetBIOS Datagram ServiceOfficial
139
TCP
UDP
NetBIOS NetBIOS Session ServiceOfficial
143
TCP
Internet Message Access Protocol (IMAP)—management of email messagesOfficial
152
TCP
UDP
Background File Transfer Program (BFTP)[ 16]
Official
153
TCP
UDP
SGMP, Simple Gateway Monitoring Protocol
Official
156
TCP
UDP
SQL ServiceOfficial
158
TCP
UDP
DMSP, Distributed Mail Service Protocol[ 17]
Unofficial
161
UDP
Simple Network Management Protocol (SNMP)Official
162
TCP
UDP
Simple Network Management Protocol Trap (SNMPTRAP)[ 18] Official
170
TCP
Print-srv, Network PostScript
Official
175
TCP
VMNET (IBM z/VM, z/OS & z/VSE - Network Job Entry(NJE))
Official
177
TCP
UDP
X Display Manager Control Protocol (XDMCP)Official
179
TCP
BGP (Border Gateway Protocol)Official
194
TCP
UDP
Internet Relay Chat (IRC)Official
199
TCP
UDP
SMUX , SNMP Unix MultiplexerOfficial
201
TCP
UDP
AppleTalk Routing MaintenanceOfficial
209
TCP
UDP
The Quick Mail Transfer Protocol
Official
210
TCP
UDP
ANSI Z39.50 Official
213
TCP
UDP
Internetwork Packet Exchange (IPX)Official
218
TCP
UDP
Message posting protocol (MPP)Official
220
TCP
UDP
Internet Message Access Protocol (IMAP), version 3Official
259
TCP
UDP
ESRO, Efficient Short Remote Operations
Official
264
TCP
UDP
BGMP , Border Gateway Multicast ProtocolOfficial
280
TCP
UDP
http-mgmt Official
300
TCP
ThinLinc Web AccessUnofficial
308
TCP
Novastor Online Backup Official
311
TCP
Mac OS X Server Admin (officially AppleShare IP Web administration)Official
318
TCP
UDP
PKIX TSP, Time Stamp Protocol
Official
319
UDP
Precision time protocol event messagesOfficial
320
UDP
Precision time protocol general messagesOfficial
350
TCP
UDP
MATIP -Type A, Mapping of Airline Traffic over Internet ProtocolOfficial
351
TCP
UDP
MATIP-Type B, Mapping of Airline Traffic over Internet Protocol
Official
366
TCP
UDP
ODMR, On-Demand Mail Relay
Official
369
TCP
UDP
Rpc2portmap
Official
370
TCP
codaauth2—Coda authentication server
Official
370
UDP
codaauth2—Coda authentication server
Official
370
UDP
securecast1—Outgoing packets to NAI 's SecureCast servers [ 19]
Unofficial
371
TCP
UDP
ClearCase albd
Official
383
TCP
UDP
HP data alarm manager
Official
384
TCP
UDP
A Remote Network Server System
Official
387
TCP
UDP
AURP, AppleTalk Update-based Routing Protocol[ 20]
Official
389
TCP
UDP
Lightweight Directory Access Protocol (LDAP)Official
399
TCP
UDP
Digital Equipment Corporation DECnet (Phase V+) over TCP/IPOfficial
401
TCP
UDP
UPS Uninterruptible Power SupplyOfficial
427
TCP
UDP
Service Location Protocol (SLP)Official
443
TCP
Hypertext Transfer Protocol over TLS /SSL (HTTPS )Official
444
TCP
UDP
SNPP , Simple Network Paging Protocol (RFC 1568 )Official
445
TCP
Microsoft-DS Active Directory , Windows shares
Official
445
TCP
Microsoft-DS SMB file sharing
Official
464
TCP
UDP
Kerberos Change/Set passwordOfficial
465
TCP
URL Rendezvous Directory for SSM (Cisco protocol), SMTP over SSL
Official
475
TCP
UDP
tcpnethaspsrv (Aladdin Knowledge Systems Hasp services, TCP/IP version)
Official
491
TCP
GO-Global remote access and application publishing software Unofficial
497
TCP
Dantz Retrospect Official
500
TCP
UDP
Internet Security Association and Key Management Protocol (ISAKMP)Official
502
TCP
UDP
Modbus , ProtocolUnofficial
504
TCP
UDP
Citadel —multiservice protocol for dedicated clients for the Citadel groupware systemOfficial
512
TCP
Rexec , Remote Process ExecutionOfficial
512
UDP
comsat, together with biff
Official
513
TCP
rlogin Official
513
UDP
Who[ 21]
Official
514
TCP
Shell —used to execute non-interactive commands on a remote system (Remote Shell, rsh, remsh)Official
514
UDP
Syslog —used for system loggingOfficial
515
TCP
Line Printer Daemon —print serviceOfficial
517
UDP
Talk
Official
518
UDP
NTalk
Official
520
TCP
efs, extended file name server
Official
520
UDP
Routing Information Protocol (RIP)Official
521
UDP
Routing Information Protocol Next Generation (RIPng)Official
524
TCP
UDP
NetWare Core Protocol (NCP) is used for a variety things such as access to primary NetWare server resources, Time Synchronization, etc.Official
525
UDP
Timed, Timeserver
Official
530
TCP
UDP
RPC Official
531
TCP
UDP
AOL Instant Messenger Unofficial
532
TCP
netnews
Official
533
UDP
netwall, For Emergency Broadcasts
Official
540
TCP
UUCP (Unix-to-Unix Copy Protocol)Official
542
TCP
UDP
commerce (Commerce Applications)Official
543
TCP
klogin, Kerberos login
Official
544
TCP
kshell, Kerberos Remote shell
Official
545
TCP
OSIsoft PI (VMS), OSISoft PI Server Client AccessUnofficial
546
TCP
UDP
DHCPv6 clientOfficial
547
TCP
UDP
DHCPv6 serverOfficial
548
TCP
Apple Filing Protocol (AFP) over TCP Official
550
TCP
UDP
new-rwho, new-who[ 21]
Official
554
TCP
UDP
Real Time Streaming Protocol (RTSP)Official
556
TCP
Remotefs, RFS , rfs_server
Official
560
UDP
rmonitor, Remote Monitor
Official
561
UDP
monitor
Official
563
TCP
UDP
NNTP protocol over TLS /SSL (NNTPS)Official
587
TCP
e-mail message submission [ 22] SMTP )Official
591
TCP
FileMaker 6.0 (and later) Web Sharing (HTTP Alternate, also see port 80)Official
593
TCP
UDP
HTTP RPC Ep Map, Remote procedure call over Hypertext Transfer Protocol , often used by Distributed Component Object Model services and Microsoft Exchange Server
Official
604
TCP
TUNNEL profile,[ 23] BEEP peers to form an application layer tunnel
Official
623
UDP
ASF Remote Management and Control Protocol (ASF-RMCP)
Official
631
TCP
UDP
Internet Printing Protocol (IPP)Official
631
TCP
UDP
Common Unix Printing System (CUPS)Unofficial
635
TCP
UDP
RLZ DBase
Official
636
TCP
UDP
Lightweight Directory Access Protocol over TLS /SSL (LDAPS)Official
639
TCP
UDP
MSDP, Multicast Source Discovery Protocol
Official
641
TCP
UDP
SupportSoft Nexus Remote Command (control/listening): A proxy gateway connecting remote control traffic
Official
646
TCP
UDP
LDP, Label Distribution Protocol , a routing protocol used in MPLS networks
Official
647
TCP
DHCP Failover protocol[ 24] Official
648
TCP
RRP (Registry Registrar Protocol)[ 25]
Official
651
TCP
UDP
IEEE-MMS
Official
653
TCP
UDP
SupportSoft Nexus Remote Command (data): A proxy gateway connecting remote control traffic
Official
654
TCP
Media Management System (MMS) Media Management Protocol (MMP)[ 26]
Official
657
TCP
UDP
IBM RMC (Remote monitoring and Control) protocol, used by System p5 AIX Integrated Virtualization Manager (IVM)[ 27] Hardware Management Console to connect managed logical partitions (LPAR) to enable dynamic partition reconfigurationOfficial
660
TCP
Mac OS X Server administrationOfficial
666
TCP
UDP
Doom , first online first-person shooter Official
666
TCP
airserv-ng , aircrack-ng 's server for remote-controlling wireless devicesUnofficial
674
TCP
ACAP (Application Configuration Access Protocol )
Official
688
TCP
UDP
REALM-RUSD (ApplianceWare Server Appliance Management Protocol )
Official
691
TCP
MS Exchange RoutingOfficial
694
TCP
UDP
Linux-HA High availability HeartbeatOfficial
695
TCP
IEEE-MMS-SSL (IEEE Media Management System over SSL )[ 28]
Official
698
UDP
OLSR (Optimized Link State Routing )Official
700
TCP
EPP (Extensible Provisioning Protocol ), a protocol for communication between domain name registries and registrars (RFC 5734 )
Official
701
TCP
LMP (Link Management Protocol (Internet )),[ 29] nodes and is used to manage traffic engineering (TE) links
Official
702
TCP
IRIS[ 30] [ 31] BEEP (Blocks Extensible Exchange Protocol)[ 32] RFC 3983 )
Official
706
TCP
Secure Internet Live Conferencing (SILC)Official
711
TCP
Cisco Tag Distribution Protocol [ 33] [ 34] [ 35] Label Distribution Protocol [ 36] Official
712
TCP
Topology Broadcast based on Reverse-Path Forwarding routing protocol (TBRPF) (RFC 3684 )Official
749
TCP
UDP
Kerberos (protocol) administrationOfficial
750
UDP
kerberos-iv, Kerberos version IV
Official
751
TCP
UDP
kerberos_master, Kerberos authentication
Unofficial
752
UDP
passwd_server, Kerberos Password (kpasswd) server
Unofficial
753
TCP
Reverse Routing Header (rrh)[ 37]
Official
753
UDP
Reverse Routing Header (rrh)
Official
753
UDP
userreg_server, Kerberos userreg server
Unofficial
754
TCP
tell send
Official
754
TCP
krb5_prop, Kerberos v5 slave propagation
Unofficial
754
UDP
tell send
Official
760
TCP
UDP
krbupdate [kreg], Kerberos registration
Unofficial
782
TCP
Conserver serial-console management serverUnofficial
783
TCP
SpamAssassin spamd daemonUnofficial
800
UDP
mdbe daemon
Official
808
TCP
Microsoft Net.TCP Port Sharing Service
Official
829
TCP
Certificate Management Protocol[ 38]
Unofficial
843
TCP
Adobe Flash [ 39] Unofficial
847
TCP
DHCP Failover protocolOfficial
848
TCP
UDP
Group Domain Of Interpretation (GDOI) protocol
Official
860
TCP
iSCSI (RFC 3720 )Official
861
TCP
UDP
OWAMP control (RFC 4656 )
Official
862
TCP
UDP
TWAMP control (RFC 5357 )
Official
873
TCP
rsync file synchronization protocolOfficial
888
TCP
cddbp, CD DataBase (CDDB ) protocol (CDDBP), IBM Endpoint Manager Remote Control
Unofficial
897
TCP
UDP
Brocade SMI-S RPCUnofficial
898
TCP
UDP
Brocade SMI-S RPC SSLUnofficial
901
TCP
Samba Web Administration Tool (SWAT)Unofficial
901
TCP
UDP
VMware Virtual Infrastructure Client (from managed device to management console)Unofficial
902
TCP
UDP
ideafarm-door
Official
902
TCP
UDP
VMware Server Console (from management console to managed device)Unofficial
903
TCP
VMware Remote Console [ 40] Unofficial
904
TCP
VMware Server Alternate (if 902 is in use, i.e. SUSE linux)Unofficial
911
TCP
Network Console on Acid (NCA)—local
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