Reserved port；not used（if the sending process does not prepare to accept reply messages，can be used as source port）
Common Software02 TCP/IP Stack TCP/IPProtocol
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
Common Software02 Network Testing NetworkTestingTool
Daytime Protocol service port for retrieving system date and time information
Network Status Protocol service port for displaying network connection status information
Common Software02 Network Diagnostics NetworkTool
Quote of the Day Protocol service port for providing daily quotes and message services
Message SendingProtocol
Common Software02 Message Send Protocol MessageProtocolService
Legacy Messaging MessageService
Character Generator Protocol service port for generating test character streams
Common Software02 Network Testing NetworkTestingTool
FTP data transfer port for File Transfer Protocol data connections
Common Software02 vsftpd Very Secure FTP Daemon, popular FTP server on Linux
Simple Mail Transfer Protocol port for mail transmission and routing services
Common Software02 Legacy File Transfer FileTransferService
Private printer service port
Common Software02 Private Printer Services Private printing service
Legacy Printing Systems Legacy printing system
Resource Location Protocol service port for network resource location and discovery
Graphics Protocol service port for graphics data transmission and processing
Common Software02 Graphics Protocol ProtocolService
Host Name Server port for hostname resolution and name services
WHOIS protocol port for domain name and IP address information queries
TCP 49 is the registered port for TACACS+ (Terminal Access Controller Access-Control System Plus), the AAA protocol network devices use for centralized authentication, authorization and accounting of admin logins — think Cisco ISE or the open TACACS+ daemon.
Common Software02 TACACS Terminal Access Control TerminalControlControlSystem
Authentication Systems authenticationsystem
MTP ，mailtransferprotocol
Common Software02 MTP Server mailtransferprotocolserver
Mail Transfer Systems mailtransfersystem
DHCPv4 servers use UDP 67 and clients use UDP 68. This is an address-lease protocol, not a website to open in a browser.
Common Software03 ISC DHCP Internet Systems Consortium DHCP server
DHCP client port for Dynamic Host Configuration Protocol
Common Software03 dhclient Linux/Unix DHCP client
Gopher protocol port for document retrieval and information browsing
Common Software02 Gopher Server Gopherprotocolserver
Finger protocol port for user information queries and system status retrieval
HTTP alternative port for web services and HTTP communication
Common Software02 Anonymous Browsing Service
HTTP alternative port for web proxy and caching services
Kerberos authentication protocol port
Hostname service port for network hostname resolution
Common Software02 NIC Name Server NetworkServer
Legacy Name Services Service
Ident - Legacy server identification system, still used by IRC servers for user authentication
Common Software02 identd Identity daemon process
IRC Servers IRC server authentication
UUCP path service port for Unix-to-Unix copy protocol path information
Common Software02 UUCP Path UNIXUNIXProtocolService
Network News Transfer Protocol port for newsgroup article distribution and retrieval
Common Software03 NNTP新闻组 Network News Transfer Protocol
Microsoft RPCEndpoint Mapper，forWindows RPCService
Common Software03 Windows RPC WindowsRemoteService
DCOM Distributed Component Distributed
Microsoft RPC MicrosoftRemoteService
UDP 137 is the NetBIOS Name Service (NBNS) from the legacy Windows stack — it resolves computer names to IPs. UDP 138 (datagram) and TCP 139 (session) complete the trio. Modern Windows networks rely on DNS plus SMB over 445, leaving 137 as legacy.
Common Software03 Windows NetBIOS WindowsNetBIOSService
Samba UnixSystemSMB/CIFSProtocol
NetBIOS Name Service NetBIOSService
NetBIOS datagram service port for Windows network connectionless communication
Common Software03 Windows NetBIOS WindowsNetBIOSService
Samba UnixSystemSMB/CIFSProtocol
NetBIOS Datagram Service NetBIOSService
BFTP, BackgroundFileTransferProgram
Common Software02 Background File Transfer FileTransfer
Batch Transfer Systems TransferSystem
Simple GatewayMonitoringProtocol（[Simple Gateway Monitoring Protocol]( )，SGMP）
Common Software02 SGMP Gateway MonitoringProtocol
Distributed Mail System Protocol port for mail routing and transmission
Common Software02 DMSP Server DistributedMailServiceProtocolServer
Mail Distribution Systems MailSystem
Network printing protocol port for network printing services
Common Software02 Network Print Services networkprintingservice
Unix Print Spooler UnixPrinting
Border Gateway Protocol port for internet routing information exchange
AppleTalk Routing Maintenance
Common Software02 Legacy Apple Networking NetworkService
Quick Mail Transfer Protocol port for mail transmission and relay services
Common Software02 Quick Mail Transfer MailTransferProtocol
IPX protocol port for Novell network communication protocol
Common Software02 IPX Gateway IPXgatewayservice
Novell NetWare Novellnetworkservice
Message Posting Protocol port for message distribution and publishing services
Common Software02 Message Publishing MessageSystem
IMAP3 protocol port for mail retrieval and management
Efficient Short Remote Operations protocol port for short message transmission services
Common Software02 ESRO Service RemoteService
Remote Operations RemoteSystem
BGMP protocol port for Border Gateway Multicast Protocol
Novastor Online Backup
Common Software02 Online Backup BackupService
AppleShare IP file service port for Apple file sharing protocol
Timestamp Protocol port for time synchronization and timestamp services
Common Software02 TSP Service TimeProtocolService
Time Synchronization TimeSyncService
H.323 call signaling port for audio-video communication protocol
Common Software02 IMMP Server MessageProtocolServer
Message Mapping MessageService
ODMR，On DemandMailDelivery
Rpc2portmap service port for remote procedure call port mapping
Common Software02 Rpc2portmap RPC2PortService
RPC Services RemoteService
Remote Network Connection protocol port for network device remote management
Common Software02 Remote Network Server remotenetworkserversystem
Network Services networkservice
AURP, AppleTalk Upgrade RoutingProtocol
Common Software02 AURP Router AppleTalkProtocol
Unassigned protocol port for application-specific services
Common Software02 Power Management ManagementSystem
Direct Connect protocol port for peer-to-peer file transfer
Common Software02 Direct Connect Hub Direct ConnectService
Trap Convention port for system monitoring and alert services
Common Software02 Direct Connect Client Direct Connectclient
File Sharing FileSharingApplication
Service Location Protocol port for network service discovery
Common Software02 SLP Service ServiceProtocol
Simple Network Paging Protocol port for paging and notification services
Common Software02 SNPP Service NetworkProtocol
Kerberos password change port for password modification and key management
Common Software02 Password Management ManagementSystem
Retrospect service port for file system backup and recovery
IPSec (Internet Protocol Security) IKE (Internet Key Exchange) port
Common Software03 Windows IPSec WindowsIPSecService
Remote Execution protocol port for remote command execution services
Common Software02 Berkeley r-commands Remote
Remote Login protocol port for remote login and authentication services
Common Software02 Remote Login RemoteService
Syslog system log protocol port for log transmission
Common Software02 Syslog System log protocol port
TCP 515 is the LPD (line printer daemon) protocol from Unix history, kept alive for legacy printers and enterprise print servers. New deployments should prefer IPP (631) or raw jetdirect (9100).
Common Software02 LPD (Line Printer Daemon) Printing
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
Common Software02 Courier RPC Courier RPCsystem
netnews protocol port for network news transmission and distribution
UUCP Unix-to-Unix Copy Protocol port for file transfer
Common Software02 UUCP Daemon UNIXUNIXProtocol
File Transfer filetransfersystem
DHCPv6 client
Common Software02 IPv6 Configuration IPv6configurationservice
DHCPv6 client port for IPv6 dynamic host configuration
IMAP over SSL port for secure mail retrieval
Common Software02 Secure Mail Access securemailaccess
Internet Printing Protocol port for network printing service management
Common Software02 Windows Print Spooler WindowsPrinting
Doom game protocol port for multiplayer game network communication
Common Software01 Doom Game Doom multiplayer game port
MS Exchange routing port for mail system routing services
Common Software01 MS Exchange Routing Microsoft Exchange Routing Group port
VMware ESX server port for virtualization management services
Common Software01 VMware Auth VMware ESX server authentication port
Dynamic port range starting port, beginning of system-assigned ephemeral ports
Common Software01 Dynamic Port Start Dynamic port range starting port, beginning of system-assigned ephemeral ports
Dynamic port range port for client temporary connections
Common Software01 Windows Messenger Windows MessengerServicePort
Dynamic port range port for network application temporary connections
Common Software01 ICQ Instant Messaging ICQCommunicationSoftware
Dynamic port range port for system service temporary connections
Dynamic port range port for inter-process temporary communication
Common Software01 Windows RPC WindowsRemotePort
Dynamic port range port for application temporary port allocation
Common Software01 BBN IAD BBN IADNetworkProtocol
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
Common Software01 Windows Live Messenger Windows Live Messenger instant messaging
L2TP protocol port for Layer 2 Tunneling Protocol
Common Software01 L2TP VPN Layer 2 Tunneling Protocol VPN
PPTP protocol port for Point-to-Point Tunneling Protocol
Common Software02 PPTP VPN Point-to-Point Tunneling Protocol VPN service
Windows Media service port for streaming media transmission
Common Software01 Windows Media Services Microsoft Windows Media streaming service
RADIUS authentication port for network access authentication services
Common Software01 RADIUS Authentication RADIUS Remote Authentication Dial-In User Service
RADIUS accounting port for network access accounting services
Common Software01 RADIUS Accounting RADIUS accounting and auditing service
MSN Messenger port for instant messaging services
Common Software01 MSN Messenger Microsoft MessengerService
Cisco SCCP protocol port for IP telephony signaling control
Common Software01 Cisco SCCP Cisco Skinny Client Control Protocol
Device management port for network device configuration
Common Software02 device2 Device2NetworkProtocol
Device management port for backup network device configuration
Infowave Mobility service port for mobile application communication
Common Software02 cPanel cPanelWebsiteControlPanel
Infowave InfowaveMobileSystem
Zephyr notification service port for message notification systems
Common Software02 Zephyr Notification Zephyr notification system service
IBM MQSeries - IBM MQSeriesMessage Queue
Symantec AV port for antivirus software communication
Common Software01 Symantec AntiVirus Symantec AntiVirus management service
iTunes Digital Audio Access Protocol port for music sharing services
Common Software01 iTunes DAAP iTunes Digital Audio Access Protocol
RadminVPN service port for remote desktop connections
Common Software01 Radmin Remote Control Radmin remote desktop management tool
Universal network service port for socket communication
Common Software01 Slingbox Slingbox media streaming device
FileMaker Pro database port for database network sharing
Common Software01 FileMaker Pro FileMaker Pro database service
RTP media transport port for real-time media streaming
Common Software01 RTP Real-time Transport Real-time Transport Protocol media streaming
Service: Yahoo! Messenger...; Java frameworks: Ratpack
Common Software02 Yahoo Messenger Yahoo instant messaging service
Ratpack Default port for Ratpack asynchronous web framework
Session Initiation Protocol port for VoIP voice calls and video communication
Common Software01 SIP Voice Call Session Initiation Protocol port for VoIP voice calls and video communication
AOL Instant Messaging
Common Software01 AOL Instant Messenger America Online instant messaging service
XMPP client connection
Common Software01 XMPP Client XMPP Extensible Messaging and Presence Protocol client
XMPP server connection
Common Software01 XMPP Server XMPP server-to-server communication protocol
VNC remote desktop port for cross-platform remote desktop access
NRPE Plugin
Common Software02 Nrpe Nagios Nagios Remote Plugin Executor
X Window System display protocol port for graphical interface forwarding
Common Software01 X11 Forwarding X Window System display protocol port for graphical interface forwarding
DameWare remote support
Common Software01 DameWare Remote DameWare remote management tool
Service: BitTorrent Tracker...
Common Software01 BitTorrent Tracker BitTorrent file sharing 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
Common Software02 Zabbix MonitoringMonitoringNetworkApplication
Zabbix Server port for monitoring server data collection
Common Software02 Zabbix MonitoringMonitoringNetworkApplication
Memcached cache port for distributed memory caching system
Common Software02 Memcached Default port for Memcached memory caching system
Network service port for high-port application services
Common Software01 Usermin UserminUserManagementInterface
Network service port for high-port application services
Common Software01 DAHUA DVR DAHUA Digital Video Recorder management port