Lantronix EDS4100 User Manual

6: Networking and Security
EDS4100 4 Port Device Server User Guide 123
Tunneling and the EDS4100
Each EDS4100 serial port supports two concurrent tunneling connections, Connect mode
and Accept mode. These connections operate independently of the other EDS4100 serial
ports.
 In Connect mode, the EDS4100 actively makes a connection. The receiving node on
the network must listen for the Connect mode’s connection. By default, Connect
mode is disabled.
 In Accept mode, the EDS4100 listens for a connection. A node on the network
initiates the connection. By default, Accept mode is enabled.
 Disconnect mode defines how an active connection is disconnected. The parameters
used to drop the connection are user configurable. The EDS4100’s Disconnect mode
disconnects both Accept mode and Connect mode connections on a serial port when
it observes the defined event occur on that port.
When any character arrives through the serial port, it gets copied to both the Connect
mode connection and Accept mode connection if both are active.
Connect Mode
For Connect mode to work:
 Connect mode must be enabled on the EDS4100 (see Tunnel – Connect Mode Page
on page 54).
 A remote station (node) must be configured for Connect mode.
 A remote TCP or UDP port must be configured.
When Connect mode is enabled, it remains on until it is ended by Disconnect mode.
Connect mode supports the following protocols:
 TCP
 AES encryption over UDP
 AES encryption over TCP
 SSH (the EDS4100 is the SSH client)
 UDP (available only in Connect mode since it is a connectionless protocol)
For AES encryption, both the encrypt key and the decrypt key must be specified. The
encrypt key is used with data sent from the EDS4100, while the decrypt key is used when
the EDS4100 receives data. Both keys can have the same value.
If the remote address or port is not configured for Connect mode using UDP, the
EDS4100 accepts packets from any device on the network and sends packets to the last
device that sent it packets. Therefore, configure the remote address and port. When the
remote port and station are configured, the EDS4100 ignores date from other sources.
To configure SSH, the SSH client username must be configured. In Connect Mode, the
EDS4100 is the SSH client. Ensure the EDS4100’s SSH client username is configured on
the SSH server before using it with the EDS4100.

Lantronix EDS4100 Specifications

General

Ethernet Ports	4
Network Ports	4
Console Port	1
Storage Temperature	-40°C to 85°C
Humidity	5% to 95% non-condensing
Memory	32MB SDRAM, 8MB Flash
Operating Temperature	0°C to 50°C
Power Supply	External

Summary

Preface to EDS4100 User Guide

Purpose, Audience, and Chapters

Defines target users, guide scope, and outlines chapter content.

Additional Documentation

Lists supplementary guides available on CD or Lantronix website.

Introduction to EDS4100 Device Server

Overview and Key Features

Introduces the device, its capabilities, and lists primary features.

Evolution OS and Configuration Methods

Details the OS features and outlines Web, CLI, and XML configuration interfaces.

SNMP, XML, Security, and Troubleshooting

Explains SNMP, XML, enterprise security, and diagnostic tools for the device.

Applications of EDS4100

Lists various use cases including automation, healthcare, retail, console, and traffic management.

Installation and Setup Guide

Package Contents, User Items, and Hardware

Lists included items, user items, and identifies physical components of the EDS4100.

Ports, Indicators, and Power Options

Details serial/Ethernet ports, status LEDs, and power-up methods.

Installation Procedure and Configuration Methods

Guides device connection and introduces Web, CLI, XML configuration.

Device Configuration Tools Overview

Describes DeviceInstaller, Web Manager, CLI, and XML interfaces for setup.

Web Manager Configuration Details

Accessing and Navigating the Web Manager

Step-by-step guide to logging in and navigating the interface.

Device Status and Network Configuration

Overview of device status and configuring network parameters like IP address, mask, and gateway.

Serial Line and Tunnel Configuration

Details settings for serial ports (baud, parity) and configuring up to four tunnels.

Protocol, Security, and XML Settings

Covers DNS, SNMP, FTP, TFTP, HTTP, SSH, SSL, and XML configuration options.

Filesystem and Network Stack Management

Manages files, browses filesystem, and configures protocol stack and IP filters.

Diagnostic Tools and System Management

Provides tools for ping, traceroute, DNS lookup, memory, processes, and system settings.