https://support.apple.com/en-us/103229

TCP and UDP ports used by Apple software products

TCP and UDP ports used by Apple software products
These are some of the common TCP and UDP ports used by Apple products, such as macOS and iCloud. Many are well-known, industry-standard ports.

This list and the list of hosts and ports required to use Apple products on enterprise networks are updated periodically.

If you’re configuring a firewall or similar access-control scheme, port-watching software can help you decide how to do it. Be aware that some products can use different ports and services, including ports and services not documented here. And some services, such as those used for a VPN, can use multiple ports. If your firewall doesn’t specify a port's type, it probably configures that port for both TCP and UDP. (The application firewall in macOS controls access by app, not by port.)

Port

Type

Service1 or protocol

RFC2

Service name3

Used by

22

TCP

Secure Shell (SSH), SSH File Transfer Protocol (SFTP), and Secure copy (scp)

4253

ssh

Xcode Server (hosted and remote Git+SSH, remote SVN+SSH)

25

TCP

Simple Mail Transfer Protocol (SMTP)

5321

smtp

Mail (sending email), iCloud Mail (sending email)

53

TCP, UDP

Domain Name System (DNS)

1034

domain

—

80

TCP

Hypertext Transfer Protocol (HTTP)

2616

http

World Wide Web, FaceTime, iMessage, iCloud, Maps, Apple Music, iTunes Store, Podcasts, Mac App Store, Backup, Calendar, WebDAV, AirPlay, macOS Internet Recovery, Xcode Server (Xcode app, hosted and remote Git HTTP, remote SVN HTTP)

88

TCP

Kerberos

4120

kerberos

Kerberos, including Screen Sharing authentication

110

TCP

Post Office Protocol (POP3),

Authenticated Post Office Protocol (APOP)

1939

pop3

Mail (receiving email)

123

UDP

Network Time Protocol (NTP)

1305

ntp

Date & Time preferences, network time server synchronization, Apple TV network time server sync

137

UDP

Windows Internet Naming Service (WINS)

—

netbios-ns

—

138

UDP

NETBIOS Datagram Service

—

netbios-dgm

Windows Datagram Service, Windows Network Neighborhood

139

TCP

Server Message Block (SMB)

—

netbios-ssn

File sharing and Windows print services

143

TCP

Internet Message Access Protocol (IMAP)

3501

imap

Mail (receiving email)

192

UDP

OSU Network Monitoring System

—

osu-nms

AirPort Base Station PPP status or discovery (certain configurations), AirPort Admin Utility, AirPort Express Assistant

389

TCP

Lightweight Directory Access Protocol (LDAP)

4511

ldap

Apps that look up addresses, such as Mail and Address Book

443

TCP

Secure Sockets Layer (SSL or HTTPS)

2818

https

TLS websites, iTunes Store, Software Update, Spotlight Suggestions, Mac App Store, Maps, FaceTime, Game Center, iCloud authentication and DAV Services (Contacts, Calendars, Bookmarks), iCloud backup and apps (Calendars, Contacts, Find My iPhone, Find My Friends, Mail, iMessage, Documents & Photo Stream), iCloud Key Value Store (KVS), AirPlay, macOS Internet Recovery, Dictation, Siri, Xcode Server (hosted and remote Git HTTPS, remote SVN HTTPS, Apple Developer registration), Push notifications (if necessary)

443

UDP

QUIC

—

https

iCloud Private Relay

445

TCP

Microsoft SMB Domain Server

—

microsoft-ds

—

465

TCP

Message Submission for Mail (Authenticated SMTP)

urd, smtp (legacy)

Mail (sending mail)

500

UDP

Wi-Fi Calling

5996

isakmp

Wi-Fi Calling

515

TCP

Line Printer (LPR), Line Printer Daemon (LPD)

—

printer

Printing to a network printer, Printer Sharing in macOS

548

TCP

Apple Filing Protocol (AFP) over TCP

—

afpovertcp

AppleShare, Personal File Sharing, Apple File Service

554

TCP, UDP

Real Time Streaming Protocol (RTSP)

2326

rtsp

AirPlay, streaming media players

587

TCP

Message Submission for Mail (Authenticated SMTP)

4409

submission

Mail (sending mail), iCloud Mail (SMTP authentication)

631

TCP

Internet Printing Protocol (IPP)

2910

ipp

macOS Printer Sharing, printing to many common printers

636

TCP

Secure LDAP

—

ldaps

—

749

TCP, UDP

Kerberos 5 admin/changepw

—

kerberos-adm

—

993

TCP

Mail IMAP SSL

—

imaps

iCloud Mail (SSL IMAP)

995

TCP, UDP

Mail POP SSL

—

pop3s

—

1900

UDP

SSDP

—

ssdp

Bonjour

2197

TCP

Apple Push Notification Service (APNS)

—

mnp-exchange

Push notifications

3031

TCP, UDP

Remote AppleEvents

—

eppc

Program Linking, Remote Apple Events

3283

TCP, UDP

Apple Remote Desktop

—

net-assistant

Apple Remote Desktop

3284

TCP

Classroom File Transfer

—

4talk, classroom

Classroom app (document sharing)

3285

TCP

Classroom

—

plato, classroom

Classroom

3478–3497

UDP

—

—

nat-stun-port, etc. 

FaceTime, Game Center

3689

TCP

Digital Audio Access Protocol (DAAP)

—

daap

iTunes Music Sharing, AirPlay

3690

TCP, UDP

Subversion

—

svn

Xcode Server (anonymous remote SVN)

4398

UDP

—

—

—

Game Center

4500

UDP

Wi-Fi Calling

5996

ipsec-msft

Wi-Fi Calling

5100

TCP

—

—

socalia

macOS camera and scanner sharing

5223

TCP

Apple Push Notification Service (APNS)

—

—

iCloud DAV Services (Contacts, Calendars, Bookmarks), Push Notifications, FaceTime, iMessage, Game Center, Photo Stream

5228

TCP

—

—

—

Spotlight Suggestions, Siri

5297

TCP

—

—

—

Messages (local traffic)

5350

UDP

NAT Port Mapping Protocol Announcements

—

—

Bonjour

5351

UDP

NAT Port Mapping Protocol

—

nat-pmp

Bonjour

5353

UDP

Multicast DNS (MDNS)

3927

mdns

Bonjour, AirPlay, Home Sharing, Printer Discovery

5900

TCP

Remote Framebuffer

6143

rfb

Apple Remote Desktop, Screen Sharing

5900

UDP

Remote Framebuffer, Real-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)

—

rfb

Apple Remote Desktop, Screen Sharing

5901–5902

UDP

Real-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)

—

—

Apple Remote Desktop, Screen Sharing

8000–8999

TCP

—

—

irdmi, etc.

Web service, iTunes Radio streams

9100

TCP

Printing

—

hp-pdl-datastr

Printing to certain network printers

9418

TCP, UDP

git pack transfer

—

git

Xcode Server (remote git)

16384–16403

UDP

Real-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)

—

connected, etc.

Messages (Audio RTP & RTCP, Video RTP & RTCP)

16384–16387

UDP

Real-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)

—

connected, etc.

FaceTime, Game Center

16393–16402

UDP

Real-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)

—

connected, etc.

FaceTime, Game Center

16403–16472

UDP

Real-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)

—

—

Game Center

42000–42999

TCP

—

—

—

iTunes Radio streams

49152–65535

TCP

Xsan

—

—

Xsan Filesystem Access

The service registered with the Internet Assigned Numbers Authority, excluding any noted as for “unregistered use.”

The number of a Request for Comment document, maintained by RFC Editor, that defines the service or protocol.

In the output of Terminal commands, the port number might be replaced by this name, which is the label listed for that port in /etc/services.

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Published Date: April 10, 2025