TCP and UDP ports used by Apple software products

Learn about TCP and UDP ports used by Apple products such as macOS, and iCloud. Many of these are well-known, industry-standard ports.

Ports used by Apple products

This is a quick-reference guide showing common examples, not a comprehensive list of ports. This guide is updated periodically with information available at the time of publication. For hosts and ports specific to enterprise networks, learn about using Apple products on enterprise networks.

Some software might use different ports and services, so it can be helpful to use port-watching software when deciding how to set up firewalls or similar access-control schemes.

Some services might use more than one of these ports. For example, a VPN service can use up to four different ports. When you find a product in this list, search (Command-F) in your browser for that name, then repeat your search (Command-G) to locate all occurrences of that product.

Some firewalls allow selective configuration of UDP or TCP ports with the same number, so it's important to know the type of port you're configuring. If your firewall doesn't allow you to specify the type of port, configuring one type of port probably configures the other.

Port

TCP or

UDP

Service or

protocol name1

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)

445

TCP

Microsoft SMB Domain Server

microsoft-ds

465

TCP

Message Submission for Mail (Authenticated SMTP)

smtp (legacy)

Mail (sending mail)

500

UDP

Wi-Fi Calling

5996

IKEv2

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)

Push notifications

3031

TCP/UDP

Remote AppleEvents

eppc

Program Linking, Remote Apple Events

3283

TCP/UDP

Apple Remote Desktop and Classroom

net-assistant, classroom

Apple Remote Desktop

3284

TCP

Classroom File Transfer

classroom

Classroom app (document sharing)

3285

TCP

Classroom

classroom

Classroom

3478–3497

UDP

nat-stun-port - ipether232port

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

IKEv2

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)

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

Web service, iTunes Radio streams

9100

TCP

Printing

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, —

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

16384–16387

UDP

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

connected, —

FaceTime, Game Center

16393–16402

UDP

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

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

1. The service registered with the Internet Assigned Numbers Authority, except where noted as “unregistered use.”

2. The number of a Request for Comment (RFC) document that defines the service or protocol. RFC documents are maintained by RFC Editor.

FaceTime is not available in all countries or regions.

Learn more

The application firewall in macOS is not a port-based firewall. It controls access by app, instead of by port.

Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. Contact the vendor for additional information.

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