Common Ports

Port numberService nameTransport protocolDescription

7

Echo

TCP, UDP

Echo service

19

CHARGEN

TCP, UDP

Character Generator Protocol, has severe vulnerabilities and thus is rarely used nowadays

20

FTP-data

TCP, SCTP

File Transfer Protocol data transfer

21

FTP [[FTP (21)]]

TCP, UDP, SCTP

File Transfer Protocol command control

22

SSH/SCP/SFTP

TCP, UDP, SCTP

Secure Shell, secure logins, file transfers (scp, sftp), and port forwarding

23

Telnet

TCP

Telnet protocol, for unencrypted text communications

25

SMTP [[SMTP (25, 465)]]

TCP

Simple Mail Transfer Protocol, used for email routing between mail servers

42

WINS Replication

TCP, UDP

Microsoft Windows Internet Name Service, vulnerable to attacks on a local network

43

WHOIS

TCP, UDP

Whois service, provides domain-level information

49

TACACS

UDP; can also use TCP but not necessarily on port 49

Terminal Access Controller Access-Control System, provides remote authentication and related services for network access

53

DNS [[DNS (53)]]

TCP, UDP

Domain Name System name resolver

67

DHCP/BOOTP

UDP

Dynamic Host Configuration Protocol and its predecessor Bootstrap Protocol Server; server port

68

DHCP/BOOTP

UDP

Dynamic Host Configuration Protocol and its predecessor Bootstrap Protocol Server; client port

69

TFTP

UDP

Trivial File Transfer Protocol

70

Gopher

TCP

Gopher is a communication protocol for distributing, searching, and retrieving documents in Internet Protocol (IP) networks

79

Finger

TCP

Name/Finger protocol and Finger user information protocol, for retrieving and manipulating user information

80

HTTP [[Web enumeration]]

TCP, UDP, SCTP

Hypertext Transfer Protocol (HTTP) uses TCP in versions 1.x and 2. HTTP/3 uses QUIC, a transport protocol on top of UDP

88

Kerberos

TCP, UDP

Network authentication system

102

Microsoft Exchange ISO-TSAP

TCP

Microsoft Exchange ISO Transport Service Access Point (TSAP) Class 0 protocol

110

POP3

TCP

Post Office Protocol, version 3 (POP3)

113

Ident

TCP

Identification Protocol, for identifying the user of a particular TCP connection

119

NNTP (Usenet)

TCP

Network News Transfer Protocol

123

NTP

UDP

Network Time Protocol

135

Microsoft RPC EPMAP [[WMI (135)]]

TCP, UDP

Microsoft Remote Procedure Call (RPC) Endpoint Mapper (EPMAP) service, for remote system access and management

137

NetBIOS-ns [[SMB (445, 139)]]

TCP, UDP

NetBIOS Name Service, used for name registration and resolution

138

NetBIOS-dgm [[SMB (445, 139)]]

TCP, UDP

NetBIOS Datagram Service, used for providing access to shared resources

139

NetBIOS-ssn [[SMB (445, 139)]]

TCP, UDP

NetBIOS Session Service

143

IMAP [[IMAP POP3 (110, 143, 993, 995)]]

TCP, UDP

Internet Message Access Protocol (IMAP), management of electronic mail messages on a server

161

SNMP-agents (unencrypted) SNMP (10161, UDP 161)

UDP

Simple network management protocol; agents communicate on this port

162

SNMP-trap (unencrypted) SNMP (10161, UDP 161)

UDP

Simple network management protocol; listens for asynchronous traps

177

XDMCP

UDP

X Display Manager Control Protocol

179

BGP

TCP

Border Gateway Protocol

194

IRC

UDP

Internet Relay Chat

201

AppleTalk

TCP, UDP

AppleTalk Routing Maintenance. Trojan horses and computer viruses have used UDP port 201.

264

BGMP

TCP, UDP

Border Gateway Multicast Protocol

318

TSP

TCP, UDP

Time Stamp Protocol

381

HP Openview

TCP, UDP

HP performance data collector

383

HP Openview

TCP, UDP

HP data alarm manager

389

LDAP

TCP, UDP

Lightweight directory access protocol

411

(Multiple uses)

TCP, UDP

Direct Connect Hub, Remote MT Protocol

412

(Multiple uses)

TCP, UDP

Direct Connect Client-to-Client, Trap Convention Port

427

SLP

TCP

Service Location Protocol

443

HTTPS (HTTP over SSL) [[Web enumeration]]

TCP, UDP, SCTP

Hypertext Transfer Protocol Secure (HTTPS) uses TCP in versions 1.x and 2. HTTP/3 uses QUIC, a transport protocol on top of UDP.

445

[[SMB (445, 139)]] Microsoft DS SMB

TCP, UDP

Microsoft Directory Services: TCP for Active Directory, Windows shares; UDP for Server Message Block (SMB) file-sharing

464

Kerberos

TCP, UDP

For password settings on Kerberos

465

SMTP over TLS/SSL, SSM

TCP

Authenticated SMTP over TLS/SSL (SMTPS), URL Rendezvous Directory for Cisco’s Source Specific Multicast protocol (SSM)

497

Dantz Retrospect

TCP, UDP

A software suite for backing up operating systems

500

IPSec / ISAKMP / IKE

UDP

Internet Protocol Security / Internet Security Association and Key Management Protocol / Internet Key Exchange

512

rexec [[R-Services (512,513,514)]]

TCP

Remote Process Execution

513

rlogin [[R-Services (512,513,514)]]

TCP

The Unix program rlogin allows users to log in on another host using a network.

514

syslog [[R-Services (512,513,514)]]

UDP

Syslog Protocol, for collecting and organizing all of the log files sent from the various devices on a network

515

LPD/LPR

TCP

Line Printer Daemon protocol, or Line Printer Remote protocol

520

RIP

UDP

Routing Information Protocol, used to find the optimal path between source and destination networks

521

RIPng (IPv6)

UDP

Routing Information Protocol next generation, the IPv6 compatible version of RIP

540

UUCP

TCP

Unix-to-Unix Copy Protocol

548

AFP

TCP

Apple Filing Protocol

554

RTSP

TCP, UDP

Real Time Streaming Protocol

546

DHCPv6

TCP, UDP

Dynamic Host Configuration Protocol version 6. DHCPv6 Clients listen for DHCPv6 messages on UDP port 546.

547

DHCPv6

TCP, UDP

DHCPv6 Servers and DHCPv6 Relay Agents listen for DHCPv6 messages on UDP port 547.

560

rmonitor

UDP

Remote Monitor

563

NNTP over TLS/SSL

TCP, UDP

Network News Transfer Protocol with encryption and verification

587

SMTP

TCP

For email message submission via SMTP

591

FileMaker

TCP

FileMaker Web Companion, the web publishing technology available in FileMaker versions 4-6

593

Microsoft DCOM

TCP, UDP

Distributed Component Object Model (DCOM)

596

SMSD

TCP, UDP

SysMan Station daemon

623

IPMI [[IPMI (623 UDP)]]

UDP

IPMI

631

IPP

TCP

Internet Printing Protocol

636

LDAP over TLS/SSL

TCP, UDP

Lightweight Directory Access Protocol over TLS/SSL

639

MSDP (PIM)

TCP

Multicast Source Discovery Protocol, which is part of the Protocol Independent Multicast (PIM) family

646

LDP (MPLS)

TCP, UDP

Label Distribution Protocol, applies to routers capable of Multiprotocol Label Switching (MPLS)

691

Microsoft Exchange

TCP

Microsoft Exchange Routing

860

iSCSI

TCP

Internet Small Computer Systems Interface

873

rsync [[RSYNC (873)]]

TCP

The rsync file synchronization protocol efficiently transfers and synchronizes files between devices and networked computers.

902

VMware Server

TCP, UDP

VMware ESXi, a hypervisor

989

FTPS

TCP

File Transfer Protocol (data) over TLS/SSL

990

FTPS

TCP

File Transfer Protocol (control) over TLS/SSL

993

IMAP over SSL (IMAPS) [[IMAP POP3 (110, 143, 993, 995)]]

TCP

Internet Message Access Protocol over TLS/SSL

995

POP3 over SSL (POP3S)

TCP, UDP

Post Office Protocol 3 over TLS/SSL

1025

Microsoft RPC

TCP

Microsoft Remote Procedure Call

1026-1029

Windows Messenger

UDP

Windows Messenger popup spam

1080

SOCKS proxy

TCP (or UDP since SOCKS5)

SOCKS stands for Socket Secure. This protocol exchanges network packets between a client and server through a proxy server.

1080

MyDoom

TCP

Computer virus

1194

OpenVPN

TCP, UDP

OpenVPN

1214

KAZAA

TCP

A peer-to-peer file-sharing protocol

1241

Nessus

TCP, UDP

Nessus Security Scanner

1311

Dell OpenManage

TCP

Dell EMC OpenManage Server Administrator Web GUI

1337

WASTE

TCP

WASTE peer-to-peer encrypted file-sharing Program

1433

MSSQL [[MSSQL (1433)]]

TCP

MSSQL

1521, 1522-1529

Oracle TNS Listener [[Oracle TNS (1521,1522-1529,1748)]]

TCP

Oracle TNS Listener

1589

Cisco VQP

TCP, UDP

Cisco VLAN Query Protocol (VQP)

1701

L2TP VPN

TCP

Layer Two Tunneling Protocol Virtual Private Networking

1720

H.323

TCP

H.323 Call Control Signaling, a VoIP call control protocol

1723

Microsoft PPTP

TCP, UDP

Point-to-Point Tunneling Protocol Virtual Private Networking

1725

Steam

UDP

Valve Steam Client uses port 1725

1741

CiscoWorks SNMS 2000

TCP

CiscoWorks Small Network Management Solution web server

1755

MMS

TCP, UDP

Microsoft Media Server

1812

RADIUS

UDP

RADIUS server authentication and authorization

1813

RADIUS

UDP

RADIUS server accounting

1863

(Multiple uses)

TCP, UDP

MSN Messenger, Xbox Live 360

1900

UPnP

UDP

Universal Plug and Play

1985

Cisco HSRP

UDP

Hot Standby Router Protocol

2000

Cisco SCCP

TCP

Skinny Client Control Protocol

2002

Cisco ACS

TCP

Access Control Server

2049

NFS [[NFS (2049, 111)]]

UDP

Network File Sharing

2082

cPanel

TCP, UDP

cPanel default

2083

radsec, cPanel

TCP, UDP

Secure RADIUS Service (radsec), cPanel default SSL

2100

amiganetfs

TCP

Amiga Network Filesystem

2222

DirectAdmin

TCP

Graphical web hosting control panel

2302

Gaming

UDP

The game HALO uses this port extensively

2483

Oracle

TCP, UDP

Oracle database listening for insecure client connections to the listener, replaces port 1521

2484

Oracle

TCP, UDP

Oracle database listening for SSL client connections to the listener

2745

Bagle.C – Bagle.H

TCP

Computer worms

2967

Symantec AV

TCP, UDP

Symantec System Center agent (SSC-AGENT)

3050

Interbase DB

TCP, UDP

Borland Interbase database

3074

XBOX Live

TCP, UDP

Gaming: Xbox LIVE and Games for Windows – Live

3127

MyDoom

TCP

Computer worm

3128

HTTP Proxy

TCP

Common web proxy server ports: 80, 8080, 3128, 6588

3222

GLBP

TCP, UDP

Gateway Load Balancing Protocol

3260

iSCSI Target

TCP, UDP

Microsoft iSCSI Target Server

3306

MySQL [[MySQL (3306)]]

TCP

MySQL database system

3389

RDP [[RDP (3389)]]

TCP

Windows Remote Desktop Protocol (Microsoft Terminal Server)

3689

DAAP

TCP

Digital Audio Access Protocol, used by Apple’s iTunes and AirPort Express

3690

SVN

TCP, UDP

Apache Subversion, a version control system

3724

World of Warcraft

TCP, UDP

Some Blizzard games, Unofficial Club Penguin Disney online game for kids

3784-3785

Ventrilo VoIP

TCP, UDP

Ventrilo’s Voice over Internet Protocol program

4333

mSQL

TCP

Mini SQL server

4444

Blaster

TCP, UDP

Computer worm

4500

IPSec NAT Traversal

UDP

Internet Protocol Security Network Address Translation (NAT) Traversal

4664

Google Desktop

TCP

Google Desktop’s built-in HTTP server and indexing software

4672

eMule

UDP

Peer-to-peer file-sharing software

4899

Radmin

TCP

Remote computer control software

5000

UPnP

TCP

Universal Plug and Play

5001

iperf

TCP

Tool for measuring TCP and UDP bandwidth performance

5004-5005

RTP, RTSP

UDP

Real-time Transport Protocol, Real Time Streaming Protocol

5050

Yahoo! Messenger

TCP

Instant messaging service from Yahoo

5060

SIP

TCP, UDP

Session Initiation Protocol

5061

SIP-TLS

TCP

Session Initiation Protocol over TLS

5190

(Multiple uses)

TCP, UDP

ICQ, AIM (AOL Instant Messenger), Apple iChat

5222-5223

XMPP

TCP, UDP

Extensible Messaging and Presence Protocol Client Connection; also used in Google Talk, Jabber, Apple iChat, WhatsApp, etc.

5353

MDNS

UDP

Multicast DNS

5432

PostgreSQL

TCP

PostgreSQL database system

5554

Sasser

TCP

Computer worm

5631-5632

pcAnywhere

UDP

Symantec pcAnywhere

5800

VNC over HTTP

TCP

Virtual Network Computing (VNC)

5900-5999

RFB/VNC Server

TCP, UDP

VNC Remote Frame Buffer RFB protocol

6000

X11

TCP

X Window System protocol for delivering payloads between X clients and servers

6001

X11

UDP

X Window System protocol for delivering payloads between X clients and servers

6112

Diablo

TCP, UDP

Gaming

6129

DameWare

TCP

Remote access software developed by SolarWinds

6257

WinMX

UDP

Windows Music Exchange, peer-to-peer file-sharing freeware

6346-6347

Gnutella2

TCP, UDP

Peer-to-peer network protocol

6379

Redis

TCP

Popular non-relational database management system (NoSql)

6500

GameSpy

TCP, UDP

Gaming

6566

SANE

TCP, UDP

Scanner Access Now Easy

6588

AnalogX

TCP

AnalogX proxy server

6588

HTTP Proxy

TCP

Common web proxy server ports: 80, 8080, 3128, 6588

6665-6669

IRC

TCP

Internet Relay Chat

6679, 6697

IRC over SSL

TCP

Internet Relay Chat

6699

Napster

TCP

Peer-to-peer file-sharing application

6881-6999

BitTorrent

TCP, UDP

BitTorrent uses this range of ports the most often

6891-6901

Windows Live Messenger

TCP, UDP

Alternatively: MSN Messenger

6970

Quicktime

TCP, UDP

QuickTime streaming server

7000

Cassandra

TCP

Inter-node communication within the cluster on Apache Cassandra

7001

Cassandra

TCP

SSL-enabled inter-node communication within the cluster on Apache Cassandra

7199

Cassandra JMX

TCP

Java Management Extensions on Apache Cassandra

7648-7649

CU-SeeMe

TCP, UDP

Internet video conferencing client made by Cornell University

8000

Internet Radio

TCP

Commonly choice of alternate HTTP port for web applications

8080

HTTP Proxy [[Tomcat (8080)]] ??

TCP

Common web proxy server ports: 80, 8080, 3128, 6588

8086

Kaspersky AV

TCP

Kaspersky AV Control Center

8087

Kaspersky AV

UDP

Kaspersky AV Control Center

8118

Privoxy

TCP

Advertisement-filtering Web proxy

8200

VMware Server

TCP, UDP

VMware vSphere Fault Tolerance

8222

VMware Server

TCP, UDP

VMware Server Management User Interface (insecure Web interface).

8500

(Multiple uses)

TCP, UDP

Adobe ColdFusion, Flight Message Transfer Protocol

8767

Teamspeak

UDP

VoIP communication system for online gaming

8866

Bagle.B

TCP

Computer worm

9042

Cassandra

TCP

Apache Cassandra, a NoSql database

9100

PDL

TCP

PDL Data Stream, used for printing to certain network printers

9101-9103

Bacula

TCP, UDP

For automating backup tasks

9119

MXit

TCP, UDP

MXit Instant Messaging (deprecated)

9800

WebDAV

TCP, UDP

Web-based Distributed Authoring and Versioning, an extension of HTTP

9898

Dabber

TCP

Computer worm (Sasser)

9999

Urchin

TCP, UDP

Urchin Web Analytics

10000

(Multiple uses)

TCP, UDP

Network Data Management Protocol; applications: Webmin, BackupExec, Viatalk; gaming: The Matrix Online, Dungeon Fighter

10161

[[SNMP (10161, UDP 161)]] SNMP-agents (encrypted)

TCP

Simple network management protocol; agents communicate on this port

10162

SNMP-trap (encrypted)

TCP

Simple network management protocol; listens for asynchronous traps

10113

NetIQ

TCP, UDP

NetIQ Endpoint

10114

NetIQ

TCP, UDP

NetIQ Qcheck

10115

NetIQ

TCP, UDP

NetIQ Endpoint

10116

NetIQ

TCP, UDP

NetIQ VoIP Assessor

11371

OpenPGP

TCP, UDP

OpenPGP HTTP Keyserver

12345

NetBus

TCP

NetBus remote administration tool (Trojan horse)

13720-13721

NetBackup

TCP, UDP

NetBackup request daemon

14567

Battlefield

UDP

Gaming

15118

Dipnet/Oddbob

TCP

Trojan horse

19226

AdminSecure

TCP

Panda Software AdminSecure Communication Agent

19638

Ensim

TCP

Ensim Control Panel

20000

Usermin

TCP, UDP

Web email interface for regular non-root users

24800

Synergy

TCP, UDP

Keyboard/mouse sharing software

25999

Xfire

TCP

Communication tool for gamers (deprecated)

27015

Half-Life

UDP

Gaming

27017

MongoDB

TCP

NoSql database

27374

Sub7

TCP, UDP

Trojan horse

28960

Call of Duty

TCP, UDP

Gaming

31337

Back Orifice

TCP, UDP

Remote administration tool used for Trojan horses

33434+

traceroute

UDP

Utility for displaying paths and measuring transit delays of packets across a network

Source: https://www.stationx.net/common-ports-cheat-sheet/

Kubernetes

Service

TCP Ports

etcd

2379, 2380

API server

6443

Scheduler

10251

Controller Manager

10252

Kubelet API

10250

Read-Only Kubelet API

10255

PreviousPort ScanNextDNS (53)

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