Network/Serial Clients - Digi Connect SP User Manual

•
Network services associated with serial ports in general
•
Network services associated with the command-line interface (CLI)
Network services associated with specific serial ports
•
Reverse telnet: A remote entity establishes telnet connection to a Digi device. Data passes transparently between
the telnet connection and a named serial port.
•
Reverse raw socket: A remote entity establishes a raw TCP socket connection a Digi device. Data passes
transparently between the socket and a named serial port.
•
Reverse TLS socket: An remote entity establishes an encrypted raw TCP socket to a Digi device. Data passes
transparently to and from a named serial port.
•
LPD: A remote entity establishes a TCP connection to a named serial port. The Digi device interprets the LPD
protocol and sends a print job out of the serial port.
•
Modem emulation, also known as pseudo-modem (pmodem): A remote entity establishes a TCP connection to a
named serial port. This connection is "interpreted" as an incoming call to the pseudo-modem.
Network services associated with serial ports in general
•
RealPort: A single TCP connection manages (potentially) multiple serial ports.
•
Modem emulation, also known as pseudo-modem (pool): A TCP connection to the "pool" port is interpreted as
an incoming call to an available pseudo-modem in the "pool" of available port numbers.
•
rsh: Digi devices support a limited implementation of the remote shell (rsh) protocol, in that a single service
listens to connections and allows a command to be executed. Only one class of commands is allowed: a single
integer that specifies which serial port to connect to. Otherwise, the resulting connection is somewhat similar to a
reverse telnet or reverse socket connection.
•
Reverse SSH: An encrypted tcp socket is available for each port that provides a direct connection to the
designated serial port.
•
Reverse telnet: A telnet unencrypted socket is available for each serial port that provides a telnet style
connection directly to the serial port.
•
Raw TCP: A raw TCP unencrypted socket is available for each serial port that provides an 8 bit clean connection to
the serial port
•
SSL: An SSL encrypted Raw TCP raw TCP socket is available for each serial port that provides an 8 bit clean
connection to the serial port.
Network services associated with the command-line interface
•
Telnet: A user can telnet directly to a Digi device's command-line interface.
•
Rlogin: A user can perform a remote login (rlogin) to a Digi device's command-line interface.

Network/serial clients

A network/serial client connection is a situation where a Digi device initiates a network connection or opens a serial
port for communication. There are several categories of network/serial client connections:
•
Autoconnect behavior client connections
•
Command-line interface (CLI)-based clients
•
Modem emulation (pseudo-modem) client connections
Digi Connect Family and ConnectPort TS Family User Guide 16