The role of the port

Service processes usually use a fixed port.The role of ports

Port 21: Port 21 is mainly used for FTP (File Transfer Protocol, file transfer protocol) services.Port 23: Port 23 is mainly used for Telnet (remote login) services, and is a commonly used login and emulation program on the Internet.
Port 25: Port 25 is opened by SMTP (Simple Mail Transfer Protocol, Simple Mail Transfer Protocol) server,
Mainly used for sending mail, most mail servers use this protocol today.
Port 53: Port 53 is opened by the DNS (Domain Name Server, domain name server) server.
It is mainly used for domain name resolution. DNS service is the most widely used in the NT system.
Ports 67 and 68: Ports 67 and 68 are the ports opened by Bootstrap Protocol Server
(bootstrap protocol server) and Bootstrap Protocol Client (bootstrap protocol client) serving Bootp respectively.
Port 69: TFTP is a simple file transfer protocol developed by Cisco, similar to FTP.
Port 79: Port 79 is open for Finger service, mainly used to query remote host online users, Operating system type and user details such as buffer overflows.Port 880: Port 80 is open for HTTP (HyperText Transport Protocol),
This is the most used protocol for surfing the Internet, mainly used to transmit information on WWW (World Wide Web, World Wide Web) servicesprotocol.
Port 99: Port 99 is used for a service called "Metagram Relay" (sub-countermeasure delay),
This service is relatively rare and generally not used.
Ports 109 and 110: Port 109 is open for POP2 (Post Office Protocol Version 2, Post Office Protocol 2) service,
Port 110 is open for POP3 (Mail Protocol 3) service, both POP2 and POP3 areMainly used to receive mail.
Port 111: Port 111 is the port opened by SUN's RPC (Remote Procedure Call, Remote Procedure Call) service.
It is mainly used for internal process communication between different computers in a distributed system. RPC is used in various networks.Services are important components.
Port 113: Port 113 is mainly used for the "Authentication Service" of Windows.
Port 119: Port 119 is open for "Network News Transfer Protocol" (NNTP for short).
Port 135: Port 135 is mainly used to use the RPC (Remote Procedure Call, Remote Procedure Call) protocol and provide DCOM (Distributed Component Object Model) services.
Port 137: Port 137 is mainly used for "NetBIOS Name Service" (NetBIOS Name Service).
Port 139: Port 139 is provided for "NetBIOS Session Service", which is mainly used to provide Windows file and printer sharing and Samba services in Unix.
Port 143: Port 143 is mainly used for "Internet Message Access Protocol" v2 (Internet Message Access Protocol, IMAP for short).
Port 161: Port 161 is used for "Simple Network Management Protocol" (Simple Network Management Protocol, SNMP for short).
Port 443: Port 43 is the web browsing port, mainly used for HTTPS service, which is another HTTP that provides encryption and transmission through a secure port.
Port 554: Port 554 is used by default for "Real Time Streaming Protocol" (Real Time Streaming Protocol, RTSP for short).
Port 1024: Port 1024 is generally not fixedly assigned to a service, and the interpretation in English is "Reserved" (reserved).
Port 1080: Port 1080 is the port used by the Socks proxy service. The WWW service that everyone usually uses to surf the Internet uses the proxy service of the HTTP protocol.
Port 1755: Port 1755 is used by default for "Microsoft Media Server" (Microsoft Media Server, MMS for short).
Port 4000: Port 4000 is used for the QQ chat tool that everyone often uses. To be more specific, it is the port opened for the QQ client. The port used by the QQ server is 8000.
Port 5554: On April 30 this year, it was reported that a new worm virus - Sasser (Worm.Sasser) targeting Microsoft's lsass service appeared. This virus can use TCP port 5554 to open an FTP service.for the spread of viruses.
Port 5632: Port 5632 is the port opened by the familiar remote control software pcAnywhere.
Port 8080: Port 8080 is the same as port 80. It is used for WWW proxy service and can realize web browsing.

Ports & Reason:

22: SSH RUMA, OSEGW servers, MiniPC, AAS radios need ssh for access platform also other services based on ssh such as scp.

23: telnet RUMA,MOXA need telnet for access and control the equipments which conneted to Moxa,such as Serial and PDU.

80: http SSI need http to use resultweb

443:https SSI need http to use resultweb

8443:jekins