System

Reserved port；not used（if the sending process does not prepare to accept reply messages，can be used as source port）

TCP Multiplexer service port for multiplexing multiple TCP connections on a single port

Remote Job Entry service port for remote job submission and management

Echo Protocol service port for network connection testing and diagnostics

Discard Protocol service port for network testing and data discarding

Systemstatus display

Daytime Protocol service port for retrieving system date and time information

Network Status Protocol service port for displaying network connection status information

Quote of the Day Protocol service port for providing daily quotes and message services

Message SendingProtocol

Character Generator Protocol service port for generating test character streams

FTP data transfer port for File Transfer Protocol data connections

Simple Mail Transfer Protocol port for mail transmission and routing services

Private printer service port

Resource Location Protocol service port for network resource location and discovery

Graphics Protocol service port for graphics data transmission and processing

Host Name Server port for hostname resolution and name services

WHOIS protocol port for domain name and IP address information queries

TACACS authentication protocol port for network device authentication and authorization

MTP ，mailtransferprotocol

DHCP server port for Dynamic Host Configuration Protocol

DHCP client port for Dynamic Host Configuration Protocol

Gopher protocol port for document retrieval and information browsing

Finger protocol port for user information queries and system status retrieval

HTTP alternative port for web services and HTTP communication

HTTP alternative port for web proxy and caching services

Kerberos authentication protocol port

Hostname service port for network hostname resolution

Ident - Legacy server identification system, still used by IRC servers for user authentication

UUCP path service port for Unix-to-Unix copy protocol path information

Network News Transfer Protocol port for newsgroup article distribution and retrieval

Microsoft RPCEndpoint Mapper，forWindows RPCService

NetBIOS name service port for Windows network name resolution

NetBIOS datagram service port for Windows network connectionless communication

BFTP, BackgroundFileTransferProgram

Simple GatewayMonitoringProtocol（[Simple Gateway Monitoring Protocol]( )，SGMP）

Distributed Mail System Protocol port for mail routing and transmission

Network printing protocol port for network printing services

Border Gateway Protocol port for internet routing information exchange

AppleTalk Routing Maintenance

Quick Mail Transfer Protocol port for mail transmission and relay services

IPX protocol port for Novell network communication protocol

Message Posting Protocol port for message distribution and publishing services

IMAP3 protocol port for mail retrieval and management

Efficient Short Remote Operations protocol port for short message transmission services

BGMP protocol port for Border Gateway Multicast Protocol

Novastor Online Backup

AppleShare IP file service port for Apple file sharing protocol

Timestamp Protocol port for time synchronization and timestamp services

H.323 call signaling port for audio-video communication protocol

ODMR，On DemandMailDelivery

Rpc2portmap service port for remote procedure call port mapping

ClearCase Load Balancing

Remote Network Connection protocol port for network device remote management

AURP, AppleTalk Upgrade RoutingProtocol

Unassigned protocol port for application-specific services

Direct Connect protocol port for peer-to-peer file transfer

Trap Convention port for system monitoring and alert services

Service Location Protocol port for network service discovery

Simple Network Paging Protocol port for paging and notification services

Kerberos password change port for password modification and key management

Retrospect service port for file system backup and recovery

IPSec (Internet Protocol Security) IKE (Internet Key Exchange) port

Remote Execution protocol port for remote command execution services

Remote Login protocol port for remote login and authentication services

Syslog system log protocol port for log transmission

Line Printer Daemon port for network printing services

Routing Information Protocol port for routing table information exchange

Routing Information Protocol port for network routing information exchange

Extended File Transfer Protocol port for enhanced file transfer services

RPC Remote Procedure Call port for distributed system communication

netnews protocol port for network news transmission and distribution

UUCP Unix-to-Unix Copy Protocol port for file transfer

DHCPv6 client

DHCPv6 client port for IPv6 dynamic host configuration

IMAP over SSL port for secure mail retrieval

Internet Printing Protocol port for network printing service management

Doom game protocol port for multiplayer game network communication

MS Exchange routing port for mail system routing services

VMware ESX server port for virtualization management services

Dynamic port range starting port, beginning of system-assigned ephemeral ports

Dynamic port range port for client temporary connections

Dynamic port range port for network application temporary connections

Dynamic port range port for system service temporary connections

Dynamic port range port for inter-process temporary communication

Dynamic port range port for application temporary port allocation

SOCKS proxy protocol port for proxy server connections

OpenVPN service port for VPN connections and secure tunneling

T.120 protocol port for multimedia conference data transmission

L2TP protocol port for Layer 2 Tunneling Protocol

PPTP protocol port for Point-to-Point Tunneling Protocol

Windows Media service port for streaming media transmission

RADIUS authentication port for network access authentication services

RADIUS accounting port for network access accounting services

MSN Messenger port for instant messaging services

Cisco SCCP protocol port for IP telephony signaling control

raid-cd - RAID CDService

Device management port for network device configuration

Device management port for backup network device configuration

Infowave Mobility service port for mobile application communication

Zephyr notification service port for message notification systems

IBM MQSeries - IBM MQSeriesMessage Queue

Symantec AV port for antivirus software communication

iTunes Digital Audio Access Protocol port for music sharing services

RadminVPN service port for remote desktop connections

Universal network service port for socket communication

FileMaker Pro database port for database network sharing

RTP media transport port for real-time media streaming

Service: Yahoo! Messenger...; Java frameworks: Ratpack

Session Initiation Protocol port for VoIP voice calls and video communication

AOL Instant Messaging

XMPP client connection

XMPP server connection

VNC remote desktop port for cross-platform remote desktop access

NRPE Plugin

X Window System display protocol port for graphical interface forwarding

DameWare remote support

Service: BitTorrent...

Service: BitTorrent Tracker...

HTTP alternative port for web servers and applications

HTTPS alternative port for secure web applications

HTTP alternative port for web application services

HAProxy statistics port for load balancer monitoring

Prometheus Node Exporter port for system metrics collection

Zabbix Agent port for system monitoring agent communication

Zabbix Server port for monitoring server data collection

Memcached cache port for distributed memory caching system

Network service port for high-port application services

Network service port for high-port application services