Used by applications that look up addresses, such as Mail and Address Book. Lightweight Directory Access Protocol (LDAP) Xsan Admin (OS X Mountain Lion v10.8 and later) Server app, Server Admin, Workgroup Manager, Server Monitor, Xsan Admin. Simple Network Management Protocol (SNMP)ĪirPort Base Station PPP status or discovery (certain configurations), AirPort Admin Utility, AirPort Express Assistant
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Used by Microsoft Windows file and print services, such as Windows Sharing in Mac OS X. Windows Datagram Service, Windows Network Neighborhood Used for network time server synchronization, AppleTV Network Time Server Sync Used by applications that read newsgroups.ĭate & Time preferences.
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World Wide Web, iCloud, QuickTime Installer, iTunes Store and Radio, OS X Software Update (OS X Lion and earlier), Mac App Store, RAID Admin, Backup, iCal calendar publishing, WebDAV, Final Cut Server, AirPlay, OS X Internet Recovery, Profile Manager, Xcode Server (Xcode app, hosted and remote Git HTTP, remote SVN HTTP).Īuthenticated Post Office Protocol (APOP) Mail (for sending email) iCloud Mail (sending)īootstrap Protocol Server (BootP, bootps) Xcode Server (hosted and remote Git+SSH remote SVN+SSH) Please refer to the Service Name column in the table to see what the associated label is. The output of Terminal commands may replace the port number with the label that is listed in /etc/services. If your firewall doesn't allow you to specify, making changes to a port probably affects both. For example, NFS may use either or both TCP 2049 and UDP 2049 ports. Some firewalls allow selective configuration of UDP or TCP ports with the same number, so it can be important to note which type of port is to be configured. For example, VPN service may use up to four different ports: 500, 1701, 1723, and 4500. It is recommend that once you've found an instance of a product in this list, search on the name (Command-F) and then repeat (Command-G) to locate all occurrences of the product. If multiple RFCs define a protocol, there may only be one listed here. RFC documents are maintained by RFC Editor. The RFC column lists the number of the Request For Comment document that defines the particular service or protocol, which may be used for reference.
The names of Apple products that use these services or protocols appear in the Used By / Additional Information column. The Service or Protocol Name column lists services registered with the Internet Assigned Numbers Authority except where noted as "unregistered use". Apple products listed in the table are the most commonly used examples, not a comprehensive list. This document is intended as a quick reference and should not be regarded as comprehensive.
This article is updated periodically and contains information that is available at time of publication. Note that Mac OS X v10.5 and later include an Application Firewall, which is different than a port-based firewall.
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Some applications require more than one port and are listed accordingly. Network administrators may also wish to use port-watching software in addition to the information in this article when making decisions about how to set up firewalls or similar access control schemes. Not all ports and services listed are used by all software products. Your network administrator may need this information to make sure your computer or device can connect to services such as automatic software updates, or the App Store. For an explanation of what a TCP or UDP port is, see the "IP Ports" section of " OS X: What Is a Port?" The table below outlines TCP and UDP ports used by Apple products.
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