This is a list of TCP and UDP port numbers used by protocols for operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) only need one port for bidirectional traffic. TCP usually uses port numbers that match the services of the corresponding UDP implementations, if they exist, and vice versa.

SG Ports Services and Protocols - Port 512 tcp/udp information, official and unofficial assignments, known security risks, trojans and applications use.

0番のポートはエニーポート（any port）と呼ばれ、アプリケーションに対して、動的に別番号の空きポートを割り当てるために用意された特殊なポート番号である。

Port 512 is a well-known port used by the REXEC protocol for remote command execution in TCP/IP networks, allowing authenticated access.

2024年9月8日 · Ports 512, 513, 514 - Remote services. R-services span across the ports 512, 513, and 514 and are only accessible through a suite of programs known as r-commands. R-Services are a suite of services hosted to enable remote access or issue commands between Unix hosts over TCP/IP.

TCP: The exec protocol is typically run over TCP port 512, as assigned by the IANA. Example traffic. Wireshark. The exec dissector is fully functional. In some instances, such as when packets are lost, the state of the connection cannot be tracked properly.

There are different types of port numbers: Well Known Ports (0 to 1023), Registered Ports (1024 to 49151) and Dynamic or Private Ports (49152 to 65535). How Does Internet Work Menu

Internet TCP port 512 is primarily used by two Unix-based services: exec and biff. The exec service, also known as rexec, is a process that allows commands to be run on a remote server, typically used for remote administration. Biff, on the other hand, is a mail notification system that alerts users when new mail arrives.

2025年2月15日 · What is Port 512? Port number 512 is associated with the "rlogin" protocol, which historically provides a remote login capability to users on Unix and Unix-like operating systems. rlogin allows users to access remote computers and execute commands as if they were logged in locally, facilitating remote administration and management of systems.

2024年5月10日 · Use this comprehensive common ports cheat sheet to learn about any port and several common protocols. It also includes a special search and copy function.