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Remote Telnet
Port 107 is traditionally associated with the Remote Telnet service, providing remote login and command-line access to servers and network devices over plaintext connections. While Telnet was once widely used for managing networked systems, it has largely been replaced by more secure protocols such as SSH due to its lack of encryption, which poses a significant security risk when transmitting credentials and data. Nonetheless, some legacy systems or network devices may still use this port for diagnostic or management purposes in controlled environments..
Port 107 was officially assigned for the Remote Telnet Service, which is an extension or an alternative port for standard Telnet traffic that typically occurs on port 23. Telnet provides a bidirectional interactive text-oriented communication facility using a virtual terminal connection over the TCP/IP protocol. It allows users to remotely connect and manage systems via a command-line interface.
Unlike SSH, Telnet transmits data, including usernames and passwords, in plaintext, which makes it easy to intercept communications using packet sniffers. Port 107 historically served situations where a secondary Telnet service was needed, such as for segregated management access or specific network functions distinct from the primary Telnet service.
In contemporary networking, Telnet's primary port remains 23, and use of port 107 is rare and typically limited to legacy equipment or specialized environments. Modern best practices recommend using encrypted alternatives due to inherent security concerns with plaintext protocols.