Well-known ports: 0–1023

September 14, 2009

0-1023

Port

Description

Status

0/TCP,UDP

Reserved

Official

1/TCP,UDP

TCP Port Service Multiplexer

Official

2/TCP,UDP

Management Utility

Official

3/TCP,UDP

Compression Process

Official

5/TCP,UDP

Remote Job Entry

Official

7/TCP,UDP

Echo

Official

9/TCP,UDP

Discard

Official

11/TCP,UDP

Active Users

Official

13/TCP,UDP

DAYTIME – (RFC 867)

Official

17/TCP,UDP

Quote of the Day

Official

18/TCP,UDP

Message Send Protocol

Official

19/TCP,UDP

Character Generator

Official

20/TCP

FTP – data

Official

21/TCP

FTP—control (command)

Official

22/TCP,UDP

Secure Shell (SSH)—used for secure logins, file transfers (scp, sftp) and port forwarding

Official

23/TCP

Telnet protocol—unencrypted text communications

Official

25/TCP

Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail servers

Official

34/TCP,UDP

Remote File (RF)—used to transfer files between machines

Unofficial

35/TCP,UDP

Any private printer server protocol

Official

35/TCP,UDP

QMS Magicolor 2 printer server protocol

Unofficial

37/TCP,UDP

TIME protocol

Official

39/TCP,UDP

Resource Location Protocol[2] (RLP)—used for determining the location of higher level services from hosts on a network

Official

41/TCP,UDP

Graphics

Official

42/TCP,UDP

nameserver, ARPA Host Name Server Protocol

Official

42/TCP,UDP

WINS

Unofficial

43/TCP

WHOIS protocol

Official

49/TCP,UDP

TACACS aka TACOS Login Host protocol

Official

52/TCP,UDP

XNS (Xerox Network Services) Time Protocol

Official

53/TCP,UDP

Domain Name System (DNS)

Official

54/TCP,UDP

XNS (Xerox Network Services) Clearinghouse

Official

55/TCP,UDP

ISI-GL (ISI Graphics Language)

Unofficial

56/TCP,UDP

XNS (Xerox Network Services) Authentication

Official

56/TCP,UDP

RAP (Route Access Protocol)[3]

Unofficial

57/TCP

MTP, Mail Transfer Protocol

Unofficial

58/TCP,UDP

XNS (Xerox Network Services) Mail

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 protocol

Official

79/TCP

Finger protocol

Official

80/TCP,UDP

Hypertext Transfer Protocol (HTTP)

Official

81/TCP

Torpark—Onion routing

Unofficial

82/UDP

Torpark—Control

Unofficial

83/TCP

MIT ML Device

Official

88/TCP,UDP

Kerberos—authentication system

Official

90/TCP,UDP

dnsix (DoD Network Security for Information Exchange) Securit Attribute Token Map

Official

90/TCP,UDP

Pointcast

Unofficial

99/TCP

WIP Message Protocol

Unofficial

101/TCP

NIC host name

Official

102/TCP

ISO-TSAP (Transport Service Access Point) Class 0 protocol[4]

Official

104/TCP,UDP

ACR/NEMA Digital Imaging and Communications in Medicine

Official

107/TCP

Remote TELNET Service[5] protocol

Official

109/TCP

Post Office Protocol 2 (POP2)

Official

110/TCP

Post Office Protocol 3 (POP3)

Official

111/TCP,UDP

Sun Remote Procedure Call

Official

113/UDP

ident—user identification system, used by IRC servers to identify users

Official

113/TCP,UDP

Authentication Service (auth)

Official

115/TCP

Simple File Transfer Protocol (SFTP)

Official

117/TCP

UUCP Path Service

Official

118/TCP,UDP

SQL (Structured Query Language) Services

Official

119/TCP

Network News Transfer Protocol (NNTP)—used for retrieving newsgroup messages

Official

123/UDP

Network Time Protocol (NTP)—used for time synchronization

Official

135/TCP,UDP

DCE endpoint resolution

Official

135/TCP,UDP

Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service[6], used to remotely manage services including DHCP server, DNS server and WINS. Also used by DCOM

Unofficial

137/TCP,UDP

NetBIOS NetBIOS Name Service

Official

138/TCP,UDP

NetBIOS NetBIOS Datagram Service

Official

139/TCP,UDP

NetBIOS NetBIOS Session Service

Official

143/TCP,UDP

Internet Message Access Protocol (IMAP)—used for retrieving, organizing, and synchronizing e-mail messages

Official

152/TCP,UDP

Background File Transfer Program (BFTP)[7]

Official

153/TCP,UDP

SGMP, Simple Gateway Monitoring Protocol

Official

156/TCP,UDP

SQL Service

Official

158/TCP,UDP

DMSP, Distributed Mail Service Protocol

Unofficial

161/TCP,UDP

Simple Network Management Protocol (SNMP)

Official

162/TCP,UDP

Simple Network Management Protocol Trap (SNMPTRAP)[8]

Official

170/TCP

Print-srv, Network PostScript

Official

177/TCP,UDP

X Display Manager Control Protocol (XDMCP)

Official

179/TCP

BGP (Border Gateway Protocol)

Official

194/TCP,UDP

IRC (Internet Relay Chat)

Official

199/TCP,UDP

SMUX, SNMP Unix Multiplexer

Official

201/TCP,UDP

AppleTalk Routing Maintenance

Official

209/TCP,UDP

The Quick Mail Transfer Protocol

Official

213/TCP,UDP

IPX

Official

218/TCP,UDP

MPP, Message Posting Protocol

Official

220/TCP,UDP

IMAP, Interactive Mail Access Protocol, version 3

Official

259/TCP,UDP

ESRO, Efficient Short Remote Operations

Official

264/TCP,UDP

BGMP, Border Gateway Multicast Protocol

Official

311/TCP

Mac OS X Server Admin (officially AppleShare IP Web administration)

Official

308/TCP

Novastor Online Backup

Official

318/TCP,UDP

PKIX TSP, Time Stamp Protocol

Official

323/TCP,UDP

IMMP, Internet Message Mapping Protocol

Unofficial

350/TCP,UDP

MATIP-Type A, Mapping of Airline Traffic over Internet Protocol

Official

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,UDP

codaauth2 – Coda authentication server

Unofficial

370/TCP,UDP

securecast1 – Outgoing packets to NAI's servers, http://www.nai.com/asp_set/anti_virus/alerts/faq.as

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

Official

389/TCP,UDP

Lightweight Directory Access Protocol (LDAP)

Official

401/TCP,UDP

UPS Uninterruptible Power Supply

Official

402/TCP

Altiris, Altiris Deployment Client

Unofficial

411/TCP

Direct Connect Hub

Unofficial

412/TCP

Direct Connect Client-to-Client

Unofficial

427/TCP,UDP

Service Location Protocol (SLP)

Official

443/TCP,UDP

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/UDP

Microsoft-DS SMB file sharing

Official

464/TCP,UDP

Kerberos Change/Set password

Official

465/TCP

Cisco protocol

Unofficial

465/TCP

SMTP over SSL

Unofficial

475/TCP

tcpnethaspsrv (Hasp services, TCP/IP version)

Official

497/TCP

Dantz Retrospect

Official

500/UDP

Internet Security Association and Key Management Protocol (ISAKMP)

Official

501/TCP

STMF, Simple Transportation Management Framework – DOT NTCIP 1101

Unofficial

502/TCP,UDP

Modbus, Protocol

Unofficial

504/TCP,UDP

Citadel – multiservice protocol for dedicated clients for the Citadel groupware system

Official

510/TCP

First Class Protocol

Unofficial

512/TCP

Rexec, Remote Process Execution

Official

512/UDP

comsat, together with biff

Official

513/TCP

Login

Official

513/UDP

Who

Official

514/TCP

Shell—used to execute non-interactive commands on a remote system

Official

514/UDP

Syslog—used for system logging

Official

515/TCP

Line Printer Daemon—print service

Official

517/UDP

Talk

Official

518/UDP

NTalk

Official

520/TCP

efs, extended file name server

Official

520/UDP

Routing—RIP

Official

524/TCP,UDP

NCP (NetWare Core Protocol) 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, IRC

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

546/TCP,UDP

DHCPv6 client

Official

547/TCP,UDP

DHCPv6 server

Official

548/TCP

Apple Filing Protocol (AFP) over TCP

Official

550/UDP

new-rwho, new-who

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[9] (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[10], a protocol for 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

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[11]

Official

648/TCP

RRP (Registry Registrar Protocol)[12]

Official

652/TCP

DTCP, Dynamic Tunnel Configuration Protocol

Unofficial

653/TCP,UDP

SupportSoft Nexus Remote Command (data): A proxy gateway connecting remote control traffic

Official

654/TCP

AODV (Ad-hoc On-demand Distance Vector)

Official

655/TCP

IEEE MMS (IEEE Media Management System)[13][14]

Official

657/TCP,UDP

IBM RMC (Remote monitoring and Control) protocol, used by System p5 AIX Integrated Virtualization Manager (IVM)[15] and Hardware Management Console to connect managed logical partitions (LPAR) to enable dynamic partition reconfiguration

Official

660/TCP

Mac OS X Server administration

Official

665/TCP

sun-dr, Remote Dynamic Reconfiguration

Unofficial

666/UDP

Doom, first online first-person shooter

Official

674/TCP

ACAP (Application Configuration Access Protocol)

Official

691/TCP

MS Exchange Routing

Official

692/TCP

Hyperwave-ISP

Official

694/UDP

Linux-HA High availability Heartbeat

Unofficial

695/TCP

IEEE-MMS-SSL (IEEE Media Management System over SSL)[16]

Official

698/UDP

OLSR (Optimized Link State Routing)

Official

699/TCP

Access Network

Official

700/TCP

EPP (Extensible Provisioning Protocol), a protocol for communication between domain name registries and registrars (RFC 4934)

Official

701/TCP

LMP (Link Management Protocol (Internet))[17], a protocol that runs between a pair of nodes and is used to manage traffic engineering (TE) links

Official

702/TCP

IRIS[18][19] (Internet Registry Information Service) over BEEP (Blocks Extensible Exchange Protocol)[20] (RFC 3983)

Official

706/TCP

SILC, Secure Internet Live Conferencing

Official

711/TCP

Cisco TDP, Tag Distribution Protocol[21][22][23]—being replaced by the MPLS Label Distribution Protocol[24]

Official

712/TCP

TBRPF, Topology Broadcast based on Reverse-Path Forwarding routing protocol (RFC 3684)

Official

712/UDP

Promise RAID Controller

Unofficial

720/TCP

SMQP, Simple Message Queue Protocol

Unofficial

749/TCP,UDP

Kerberos administration

Official

750/TCP

rfile

Official

750/UDP

loadav

Official

750/UDP

kerberos-iv, Kerberos version IV

Official

751/TCP,UDP

pump

Official

751/TCP,UDP

kerberos_master, Kerberos authentication

Unofficial

752/TCP

qrh

Official

752/UDP

qrh

Official

752/UDP

userreg_server, Kerberos Password (kpasswd) server

Unofficial

753/TCP

Reverse Routing Header (rrh)[25]

Official

753/UDP

Reverse Routing Header (rrh)

Official

753/UDP

passwd_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

ns

Official

760/TCP,UDP

krbupdate [kreg], Kerberos registration

Unofficial

782/TCP

Conserver serial-console management server

Unofficial

783/TCP

SpamAssassin spamd daemon

Unofficial

829/TCP

CMP (Certificate Management Protocol)

Unofficial

843/TCP

Adobe Flash socket policy server

Unofficial

860/TCP

iSCSI (RFC 3720)

Official

873/TCP

rsync file synchronisation protocol

Official

888/TCP

cddbp, CD DataBase (CDDB) protocol (CDDBP)—unassigned but widespread use

Unofficial

901/TCP

Samba Web Administration Tool (SWAT)

Unofficial

901/TCP, UDP

VMware Virtual Infrastructure Client (UDP from server being managed to management console)

Unofficial

902/TCP

VMware Server Console (TCP from management console to server being Managed)

Unofficial

902/UDP

VMware Server Console (UDP from server being managed to management console)

Unofficial

903/TCP

VMware Remote Console [26]

Unofficial

904/TCP

VMware Server Alternate (if 902 is in use, i.e. SUSE linux)

Unofficial

911/TCP

Network Console on Acid (NCA)—local tty redirection over OpenSSH

Unofficial

953/TCP,UDP

Domain Name System (DNS) RDNC Service

Unofficial

981/TCP

SofaWare Technologies Remote HTTPS management for firewall devices running embedded Check Point FireWall-1 software

Unofficial

989/TCP,UDP

FTPS Protocol (data): FTP over TLS/SSL

Official

990/TCP,UDP

FTPS Protocol (control): FTP over TLS/SSL

Official

991/TCP,UDP

NAS (Netnews Administration System)

Official

992/TCP,UDP

TELNET protocol over TLS/SSL

Official

993/TCP

Internet Message Access Protocol over SSL (IMAPS)

Official

995/TCP

Post Office Protocol 3 over TLS/SSL (POP3S)

Official

999/TCP

ScimoreDB Database System

Unofficial

1001/TCP

JtoMB

Unofficial

1023/TCP,UDP

Reserved[1]

Official

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