Server Commands

password-limit

The number of attempts a user is allowed to enter a password for a serial port connection from the network, before the connection is terminated and the user has to attempt to login again. For users logging into the serial port, if this limit is exceeded, the serial port is disabled for 5 minutes. A user with Admin level rights can restart the serial port, bypassing the timeout, by issuing a kill on the disabled serial port. The default value is 3.

prompt-with-name

Displays the Server Name field value instead of default product name. When enabled, the Server Name is displayed in the IOLAN login prompt, CLI prompt, WebManager login screen, and the heading of the Menu. The default value is Off.

ip-filter

A security feature that when enabled, the IOLAN will only accept data from hosts configured in the IOLAN’s Host Table with an IP address (hosts configured with a Fully Qualified Domain Name, FQDN, will not be able to access the IOLAN when this option is enabled). The default value is Off.

single-telnet

Sets all reverse connections (raw, SSH, and telnet) to a one connection at a time mode. In this mode of operation, the IOLAN will only allow for a single TCP connection at a time to exist for each serial port configured for a reverse connection type. Subsequent connection attempts will be refused until all of the following conditions are met:

zNo active connection to serial port exists and at least 1 second has passed since the last connection was terminated.

zAll data from the previous connection on the serial port has been transmitted.

The IOLAN has logic to automatically detect when a reverse connection is no longer active. When this happens, the connection is reset and the server can go back to a listening for an incoming connection state.

Applications using Single Telnet need to be aware that there can be some considerable delay between a network disconnection and the port being available for the next connection attempt; this is to allow any data sent on prior connections to be transmitted out of the serial port. Application network retry logic needs to accommodate this feature. The default value is Off.

active-standby

(SCS only) Enables/disables the feature of automatically assigning the Ethernet 1 IP address to Ethernet 2 if Ethernet 1 should fail to communicate to the network.

miimon

(SCS only) The interval in which the active interface is checked to see if it is still communicating. The default is 100 ms.

updelay

(SCS only) The time that the IOLAN will wait to make the secondary interface (Ethernet 2) active after it has been detected as up.

power-management-menu-string

Users accessing the IOLAN through reverse sessions can enter the string to bring up a power bar management menu. This string can be up to 8 characters. Control characters can be specified by putting their decimal value within angled brackets. The default value is <016> or Ctrl-pon the keyboard.

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Perle Systems MDC, SDS manual Password-limit, Prompt-with-name, Ip-filter, Single-telnet, Active-standby, Miimon, Updelay
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SDS, MDC specifications

Perle Systems is a leading provider of connectivity solutions, renowned for its robustness and reliability in networking hardware. Among its expansive product offerings, the MDC (Multiport Device Converter) and SDS (Serial Device Server) stand out as pivotal solutions for industries requiring seamless data communication and device management.

The Perle MDC serves as a powerful multi-port device converter, providing the ability to connect multiple serial devices to a computer network without needing a separate connection for each device. This is particularly useful in environments with limited computing resources or high device density, such as railways, manufacturing plants, or remote field operations. It is designed to convert serial communication, which is commonly used in legacy devices, into Ethernet/IP or TCP/IP protocols, ensuring that older devices can integrate into modern networks.

Main features of the MDC include its robust design for industrial environments, support for a variety of serial protocols, and multiple device connections. It supports data rates of up to 115200 bps and provides easy monitoring and configuration via a web-based interface. Additionally, the MDC incorporates advanced security features including SSL and SSH encryption, ensuring data integrity and protection against unauthorized access.

On the other hand, the Perle SDS model exemplifies advanced serial device hosting capabilities, allowing users to connect Ethernet networks to serial devices. It acts as a bridge, enabling remote devices to be configured and managed over IP networks. The SDS series is known for its versatility, supporting a range of serial communication protocols, including RS-232, RS-422, and RS-485, making it suitable for various applications such as point-of-sale systems, industrial automation, and remote monitoring.

The SDS boasts several characteristics that enhance its functionality, such as automatic device discovery, real-time monitoring, and local or cloud-based management options. Its feature set also includes traffic management capabilities, allowing the optimization of device communication by controlling the flow of data, which is critical for applications requiring high reliability and low latency.

Both the MDC and SDS benefit from a strong emphasis on ease of deployment and management. They support a range of network topologies, facilitating seamless integration into existing infrastructures. Furthermore, these devices are backed by Perle Systems' reputation for customer support and a commitment to ongoing innovation, ensuring that organizations can rely on these solutions for future growth and technological advancement.
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