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Port RangeProtocolService/Protocol NameRFCService NameUsed By22TCPSecure Shell (SSH), SSH File Transfer Protocol (SFTP), Secure Copy (SCP)4253sshXcode Server (hosted and remote Git+SSH; remote SVN+SSH)25TCPSimple Mail Transfer Protocol (SMTP)5321smtpMail (sending email); iCloud Mail (sending email)53TCP/UDPDomain Name System (DNS)1034domain—80TCPHypertext Transfer Protocol (HTTP)2616httpWorld 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)88TCPKerberos4120kerberosKerberos, including Screen Sharing authentication110TCPPost Office Protocol (POP3), Authenticated Post Office Protocol (APOP)1939pop3Mail (receiving email)123UDPNetwork Time Protocol (NTP)1305ntpDate & Time preferences, network time server synchronization, Apple TV network time server sync137UDPWindows Internet Naming Service (WINS)—netbios-ns—138UDPNETBIOS Datagram Service—netbios-dgmWindows Datagram Service, Windows Network Neighborhood139TCPServer Message Block (SMB)—netbios-ssnFile sharing and Windows print services143TCPInternet Message Access Protocol (IMAP)3501imapMail (receiving email)192UDPOSU Network Monitoring System—osu-nmsAirPort Base Station PPP status or discovery (certain configurations), AirPort Admin Utility, AirPort Express Assistant389TCPLightweight Directory Access Protocol (LDAP)4511ldapApps that look up addresses, such as Mail and Address Book443TCPSecure Sockets Layer (SSL or HTTPS)2818httpsTLS 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)445TCPMicrosoft SMB Domain Server—microsoft-ds—465TCPMessage Submission for Mail (Authenticated SMTP)smtp (legacy)smtpMail (sending mail)500UDPWi-Fi Calling5996IKEv2Wi-Fi Calling515TCPLine Printer (LPR), Line Printer Daemon (LPD)—printerPrinting to a network printer, Printer Sharing in macOS548TCPApple Filing Protocol (AFP) over TCP—afpovertcpAppleShare, Personal File Sharing, Apple File Service554TCP/UDPReal Time Streaming Protocol (RTSP)2326rtspAirPlay, streaming media players587TCPMessage Submission for Mail (Authenticated SMTP)4409submissionMail (sending mail), iCloud Mail (SMTP authentication)631TCPInternet Printing Protocol (IPP)2910ippmacOS Printer Sharing, printing to many common printers636TCPSecure LDAP—ldaps—749TCP/UDPKerberos 5 admin/changepw—kerberos-adm—993TCPMail IMAP SSL—imapsiCloud Mail (SSL IMAP)995TCP/UDPMail POP SSL—pop3s—1900UDPSSDP—ssdpBonjour2197TCPApple Push Notification Service (APNS)——Push notifications3031TCP/UDPRemote AppleEvents—eppcProgram Linking, Remote Apple Events3283TCP/UDPApple Remote Desktop and Classroom—net-assistant, classroomApple Remote Desktop3284TCPClassroom File Transfer—classroomClassroom app (document sharing)3285TCPClassroom—classroomClassroom3478–3497UDP——nat-stun-port - ipether232portFaceTime, Game Center3689TCPDigital Audio Access Protocol (DAAP)—daapiTunes Music Sharing, AirPlay3690TCP/UDPSubversion—svnXcode Server (anonymous remote SVN)4398UDP———Game Center4500UDPWi-Fi Calling5996IKEv2Wi-Fi Calling5100TCP——socaliamacOS camera and scanner sharing5223TCPApple Push Notification Service (APNS)——iCloud DAV Services (Contacts, Calendars, Bookmarks), Push Notifications, FaceTime, iMessage, Game Center, Photo Stream5228TCP———Spotlight Suggestions, Siri5297TCP———Messages (local traffic)5350UDPNAT Port Mapping Protocol Announcements——Bonjour5351UDPNAT Port Mapping Protocol—nat-pmpBonjour5353UDPMulticast DNS (MDNS)3927mdnsBonjour, AirPlay, Home Sharing, Printer Discovery5900TCPRemote Framebuffer6143rfbApple Remote Desktop, Screen Sharing5900UDPRemote Framebuffer, Real-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)——Apple Remote Desktop, Screen Sharing5901–5902UDPReal-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)——Apple Remote Desktop, Screen Sharing8000–8999TCP——irdmiWeb service, iTunes Radio streams9100TCPPrinting——Printing to certain network printers9418TCP/UDPgit pack transfer—gitXcode Server (remote git)16384–16403UDPReal-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)—connected, —Messages (Audio RTP, RTCP; Video RTP, RTCP)16384–16387UDPReal-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)—connected, —FaceTime, Game Center16393–16402UDP———FaceTime, Game Center16403–16472UDPReal-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)——Game Center42000–42999TCP———iTunes Radio streams49152–65535TCPXsan——Xsan Filesystem Accesshttps://support.apple.com/en-us/103229
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