Digi LTS 32 User manual

ConnectPort®LTS
User’s Guide
ConnectPort LTS 8, ConnectPort LTS 8 MEI,
ConnectPort LTS 8 W, ConnectPort LTS 8 MEI W,
ConnectPort LTS 16, ConnectPort LTS 16 MEI,
ConnectPort LTS 16 W, ConnectPort LTS 16 MEI W,
ConnectPort LTS 16 MEI 2AC
ConnectPort LTS 32, ConnectPort LTS 32 MEI,
ConnectPort LTS 32 W, ConnectPort LTS 32 MEI W
90001001_D

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© Digi International Inc.2012.All Rights Reserved.
Digi, Digi International, the Digi logo, ConnectPort, XBee, and RealPort are trademarks or
registered trademarks of Digi International, Inc. in the United States and other countries worldwide.
All other trademarks are the property of their respective owners.
Information in this document is subject to change without notice and does not represent a
commitment on the part of Digi International.
Digi provides this document ―as is,‖ without warranty of any kind, either expressed or implied,
including, but not limited to, the implied warranties of fitness or merchantability for a particular
purpose. Digi may make improvements and/or changes in this manual or in the product(s) and/or
the program(s) described in this manual at any time.
This product could include technical inaccuracies or typographical errors. Changes are periodically
made to the information herein; these changes may be incorporated in new editions of the
publication.
Notice to Users
This equipment is for indoor use and all the communication wiring should be limited to inside of the
building.

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Contents
Contents............................................................................................................................................... 3
1. About this guide .......................................................................................................................... 7
Purpose........................................................................................................................................ 7
Audience...................................................................................................................................... 7
Scope ........................................................................................................................................... 7
Where to find more information.................................................................................................. 7
General release documentation............................................................................................ 7
Additional product information on www.digi.com.............................................................. 8
Digi contact information.............................................................................................................. 8
2. Introduction ................................................................................................................................. 9
Important Safety Information...................................................................................................... 9
The ConnectPort LTS Family.................................................................................................... 10
Features...................................................................................................................................... 10
User interfaces ................................................................................................................... 10
Quick reference for configuring features........................................................................... 11
Hardware and network interface features .......................................................................... 15
Configurable network services .......................................................................................... 15
IP protocol support............................................................................................................. 16
IP address assignment alternatives..................................................................................... 21
Alarms................................................................................................................................ 23
Modem emulation.............................................................................................................. 23
Security features ................................................................................................................ 24
Configuration management................................................................................................ 25
Supported connections and data paths....................................................................................... 26
Network services................................................................................................................ 26
Network/serial clients........................................................................................................ 28
Configuration capabilities and interfaces.................................................................................. 30
Configuration capabilities.................................................................................................. 30
Configuration interfaces .................................................................................................... 30
Digi Device Discovery utility............................................................................................ 31

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The Web interface.............................................................................................................. 33
Command-line interface..................................................................................................... 34
Simple Network Management Protocol (SNMP) .............................................................. 35
LCD panel.......................................................................................................................... 36
Monitoring capabilities and interfaces....................................................................................... 37
LCD panel.......................................................................................................................... 38
Administration tasks.................................................................................................................. 38
3. Configuration............................................................................................................................. 39
Alternate methods for assigning an IP address.......................................................................... 39
Configure an IP address using DHCP................................................................................ 39
Configure an IP address using Auto-IP.............................................................................. 39
Configure an IP address from the command-line interface................................................ 40
Test the IP address configuration....................................................................................... 40
Configuration through the web interface................................................................................... 41
Open the web interface...................................................................................................... 41
Organization of the web interface...................................................................................... 45
Change the IP address from the web interface, as needed................................................. 49
Network configuration settings.......................................................................................... 50
Serial port settings ............................................................................................................. 61
Alarms................................................................................................................................ 75
System settings .................................................................................................................. 77
User settings....................................................................................................................... 81
Peripheral........................................................................................................................... 86
Applications....................................................................................................................... 90
PPP configuration .............................................................................................................. 93
Configuration through the command line................................................................................ 101
Access the command line................................................................................................. 101
Verify device support of commands ................................................................................ 102
Configuration through Simple Network Management Protocol (SNMP)............................... 105
4. Monitoring and management................................................................................................... 106
Monitoring capabilities in the web interface........................................................................... 106
Display system information............................................................................................. 106
Manage connections and services.................................................................................... 116

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Monitoring capabilities from the command line ..................................................................... 117
Commands for displaying device information and statistics ........................................... 117
Commands for managing connections and sessions........................................................ 120
Monitoring Capabilities from SNMP ...................................................................................... 121
5Administration tasks................................................................................................................ 122
Administration from the web interface.................................................................................... 122
File management.............................................................................................................. 123
Administration from the command-line interface................................................................... 130
6LCD interface: configuration, monitoring, and diagnostics.................................................... 131
Basic keypad operation and LCD display ............................................................................... 131
Keys................................................................................................................................. 131
Keypad operations ........................................................................................................... 132
Configuration using the LCD interface................................................................................... 133
Change IP settings............................................................................................................ 133
Change the hostname....................................................................................................... 136
Change the DNS configuration........................................................................................ 138
Monitoring using the LCD interface ....................................................................................... 139
Diagnostics using the LCD interface....................................................................................... 139
Miscellaneous functions in LCD interface.............................................................................. 140
Factory Reset ................................................................................................................... 140
LED Settings.................................................................................................................... 141
7Disaster recovery..................................................................................................................... 142
Restore Digi ConnectPort LTS to Factory Default Settings.................................................... 142
8Hardware specifications .......................................................................................................... 144
9Regulatory Information and Certifications.............................................................................. 145
FCC certifications and regulatory information (USA only) .................................................... 145
FCC Part 15 Class B........................................................................................................ 145
Radio Frequency Interface (RFI) (FCC 15.105).............................................................. 145
Labeling Requirements (FCC 15.19)............................................................................... 145
Modifications (FCC 15.21).............................................................................................. 146
Declaration of Conformity....................................................................................................... 146
Industry Canada (IC) certifications ......................................................................................... 146
China regulatory information .................................................................................................. 147

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Safety statements..................................................................................................................... 148
5.10 Ignition of Flammable Atmospheres ................................................................... 148
Potentially Hazardous Atmospheres................................................................................ 148
Safety in Aircraft.............................................................................................................. 148
Safety in Hospitals........................................................................................................... 148
Pacemakers ...................................................................................................................... 148
Persons with Pacemakers:................................................................................................ 148
Rack-mountable:.............................................................................................................. 149
Lithium Battery................................................................................................................ 150
Modem............................................................................................................................. 150
Cabling............................................................................................................................. 150

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1. About this guide
Purpose
This guide describes and shows how to configure, monitor, and administer ConnectPort LTS
products.
Audience
This guide is intended for those responsible for setting up ConnectPort LTS products. It assumes
some familiarity with networking concepts and protocols.
Scope
This guide focuses on configuration, monitoring, and administration of ConnectPort LTS products.
It does not cover hardware details beyond a certain level, application development, or customization.
Where to find more information
In addition to this guide, find additional product and feature information in these documents:
General release documentation
These documents are of interest to end users:
Online help and tutorials in the web interface for the product
Digi Connect Hardware Reference Manuals
Quick Start Guides
RealPort®Installation Guide
Digi Connect Family Customization and Integration Guide
Release Notes
Cabling Guides
Python developer Wiki

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Additional product information on www.digi.com
In addition to the previous documents, product information is available on the Digi website,
www.digi.com, including:
Support Forums
Knowledge Base
Data sheets/product briefs
Application/solution guides
Digi contact information
For more information about Digi products, or for customer service and technical support, contact
Digi International.
To Contact Digi International by:
Use:
Mail
Digi International
11001 Bren Road East
Minnetonka, MN 55343
U.S.A.
World Wide Web:
http://www.digi.com/support/
email
http://www.digi.com/support/
Telephone (U.S.)
[phone] or [phone]
Telephone (other locations)
[phone] or [phone]

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2. Introduction
This chapter introduces ConnectPort LTS products, types of supported connections and data paths,
and the interface options available for configuration, monitoring, and administration tasks.
Important Safety Information
To avoid contact with electrical current:
Never install electrical wiring during an electrical storm.
Never install an Ethernet connection in wet locations unless that connector is specifically
designed for wet locations.
Use caution when installing or modifying Ethernet lines.
Use a screwdriver and other tools with insulated handles.
Wear safety glasses or goggles.
Do not place Ethernet wiring or connections in any conduit, outlet or junction box containing
electrical wiring.
Installation of inside wire may bring you close to electrical wire, conduit, terminals and other
electrical facilities. Extreme caution must be used to avoid electrical shock from such facilities.
Avoid contact with all such facilities.
Ethernet wiring must be at least 6 feet from bare power wiring or lightning rods and associated
wires, and at least 6 inches from other wire (antenna wires, doorbell wires, wires from
transformers to neon signs), steam or hot water pipes, and heating ducts.
Do not place an Ethernet connection where it would allow a person to use an Ethernet device
while in a bathtub, shower, swimming pool, or similar hazardous location.
Protectors and grounding wire placed by the service provider must not be connected to,
removed, or modified by the customer.
Do not touch no insulated Ethernet wiring if lightning is likely!
External Wiring: Any external communications wiring installed needs to be constructed to all
relevant electrical codes. In the United States this is the National Electrical Code Article 800.
Contact a licensed electrician for details.

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The ConnectPort LTS Family
ConnectPort LTS (Linux Terminal Server) products provide serial over Ethernet connectivity for
applications today and into the future. They support IPv4 and IPv6 Ethernet protocols. The
ConnectPort LTS MEI product is the same size as the ConnectPort LTS (RS-232 only version) and
is the fastest multi-port device with a Multiple Electrical Interface (MEI) in the industry.
Features
This is an overview of key product features. Firmware features are covered in more detail in the
next three chapters. For hardware specifications, see
http://www.digi.com/products/serialservers/connectportlts#specs. See also Chapter 6, "Regulatory
Information and certifications.‖
User interfaces
There are several user interfaces for configuration and monitoring, including:
A web-based interface.
A command-line interface.
Simple Network Management Protocol (SNMP).
An LCD Panel.
For additional details on these user interfaces, see "Configuration interfaces" and
"Monitoring interfaces.‖ Some user interfaces can be customized.

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Quick reference for configuring features
This guide primarily focuses on configuration, monitoring, and administration tasks from the web
interface. This table provides a quick reference for configuring features and performing device tasks,
and where to find the features and settings in the web interface and this guide.
Some features are configurable from the command line interface only. In those cases, the
commands that configure the feature are noted. The command descriptions are in the ConnectPort
LTS Command Reference.
Feature/task
Path to feature in the web interface
Administration/Configuration management:
File management: uploading and
downloading files, such as applet files,
and custom splash screens.
Administration > File Management
See also the Digi Connect Family Customization and
Integration Guide for information on uploading and
downloading files used to customize a the product’s look-
and-feel.
Python program file management.
Administration > File Management
Backup/restore configuration settings
Administration > Backup/Restore
Note: TFTP or BOOTP required if backing up from the
command line.
Update firmware
Administration > Update Firmware
Reset configuration to factory defaults
Administration > Factory Default Settings
System information, including device
identifiers and statistics
Administration > System Information
Reboot the device
Administration > Reboot
Alarms
Configuration > Alarms
Autoconnection: automatically connect a
user to a server or network device
Configuration > Serial Ports > port > Profile Settings >
TCP Sockets >
Automatically establish TCP connections
Connection management:
Manage serial port connections
Management > Serial Ports
Manage active PPP connections
Management > Connections > Active PPP Connections
Manage active system connections
Management > Connections > Active System
Connections
Domain Name System (DNS) Client
Configuration > Network > DNS > Primary DNS and
Secondary DNS
Ethernet settings
Configuration > Network > Advanced Network Settings

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Feature/task
Path to feature in the web interface
Help on configuring features
Help button on each page.
Host name for a device
Configuration > Network > Advanced Network Settings
> Host Name
IP address settings:
Using static IP addresses
Configuration > Network > IP Settings
Using DHCP
Configuration > Network > IP Settings
IPv6 Settings
Configuration > Network > IP Settings
Source Based Routing
Configuration > Network > IP Settings
Using Auto IP
Configuration > Network > Advanced Settings
Advanced network services settings:
Web settings
Configuration > Network > Network Services Settings >
Advanced Network Service Settings
SMTP settings
Configuration > Network > Network Services Settings >
Advanced Network Service Settings
NFS settings
Configuration > Network > Network Services Settings >
Advanced Network Service Settings
Samba settings
Configuration > Network > Network Services Settings >
Advanced Network Service Settings
Syslog settings
Configuration > Network > Network Services Settings >
Advanced Network Service Settings
Modem emulation
Configuration > Serial Ports > Port Profile Settings >
Modem Emulation
Multiple Electrical Interface (MEI)
Configuration > Serial Ports > Basic Serial Settings ->
MEI Type
Port logging: enabling port buffering and
displaying contents of a port buffer
To enable port logging:
Configuration > Serial Ports > Advanced Serial Settings
To display the contents of a port buffer:
Management > Serial Ports > Port Logs
Port profiles: sets of preconfigured serial-
port settings for a particular connection
and use scenario
Configuration > Serial Ports > Port Profile Settings

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Python support: loading and running
custom programs authored in the Python
programming language.
Configurable from command line only. See the set python
command in the Connect Family Command Reference.
RealPort (COM port redirection)
configuration
Configuration > Serial Ports > port > Port Profile
Settings > RealPort
See also the RealPort Installation Guide.
Reverting configuration settings
Administration > Factory Default Settings
Security/access control features:
Control access to inbound ports
Configuration > Serial Ports > port > Port Profile
Settings >
TCP Sockets or UDP Sockets or Custom port profile
Secure Shell Server (SSH)
Network > Network Service Settings -> Basic Network
Services Settings > Enable Secure Shell Server (SSH)
Establish/change user name for a user
Configuration > Users > select a user to change,or select
Add New User for a new user
Issue a new/changed password to a user
Configuration > Users > select a user to change or select
Add New User for a new user
Set permissions associated with various
services and commands
Configuration > Users > select a user to change or add
Set authentication method for port access
Configuration > Serial Ports > port > Authentication
Settings
Serial port configuration:
Basic serial port settings
Configuration > Serial Ports > Basic Serial Settings
Advanced serial port settings
Configuration > Serial Ports > Advanced Serial Settings
Port profiles: associate a serial port with
a set of preconfigured port settings for a
specific use
Configuration > Serial Ports > Port Profile Settings
RTS Toggle
Configuration > Serial Ports > Advanced Serial Settings
Port Sharing: allow a serial port to be
shared by multiple software applications
Configuration > Serial Ports > Port > Port Profile
Settings > TCP Server Settings (if TCP Sockets profile is
set) or Network Services (if Custom profile is set)
Note: Not available for RealPort.

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Simple Network Management Protocol (SNMP):
Configure SNMP through the web
interface
Configuration > System > Simple Network
Management Protocol (SNMP) Settings
Enable/disable SNMP service
Network > Network Service Settings -> Basic Network
Services Settings
Enable/disable SNMP alarm traps
Configuration > Alarms > alarm > Send SNMP trap to
following destination when alarm occurs
Use SNMP as primary configuration
interface
Basic network and serial settings configurable through
standard and Digi-specific Management Information
Blocks (MIBs).
More advanced settings are also possible through SNMP.
System information: assign system-
identifying information to a device
Configuration > System > Device Identity Settings
Authentication configuration for Web
and CLI access
Configuration > System > Authentication Settings
Statistics
Administration > System Information
Status information
Management > Serial Ports, Connections, Network
Services
Peripheral settings:
SD Memory
Peripheral > SD Memory
USB
Peripheral > USB
Modem
Peripheral > Modem
LCD
Peripheral > LCD
XBee
Peripheral > XBee
Application settings:
PPP
Application > PPP
Python
Application->Python
RealPort
Application->RealPort

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Hardware and network interface features
For detailed hardware specifications and network interface information, go to:
http://www.digi.com/products/serialservers/connectportlts#specs.
See also the data sheet for your Digi product.
Configurable network services
Access to network services can be enabled and disabled. This means that a device’s use of network
services can be restricted to those strictly needed by the device. To improve device security,
non-secure services, such as Telnet, can be disabled. Network services that can be enabled or
disabled include:
Advanced Digi Discovery Protocol (ADDP): can enable or disable ADDP, but cannot change
its network port number.
RealPort
Encrypted RealPort
HTTP/HTTPS
Line Printer Daemon (LPD)
Remote Login (rlogin)
Remote Shell (rsh)
Simple Network Management Protocol (SNMP)
Telnet
Secure Shell Server (SSH)
In the web interface, access to network services is enabled and disabled on the Network Services
page of Network Configuration. For more information, see ―Basic Network Services Settings‖ on
page 53.
In the command-line interface, network services are enabled and disabled through the set service
command. See the ConnectPort LTS Command Reference for the set service command description.

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IPprotocol support
All ConnectPort LTS products include a robust on-board TCP/IP stack with a built-in web server.
Supported protocols include, unless otherwise noted:
Transmission Control Protocol (TCP)
User Datagram Protocol (UDP)
Dynamic Host Configuration Protocol (DHCP)
Simple Network Management Protocol (SNMP)
Secure Sockets Layer (SSL)/Transport Layer Security (TLS)
Telnet Com Port Control Option (Telnet).See "Serial data communication over TCP and UDP"
for additional information.
Remote Login (rlogin)
Line Printer Daemon (LPD)
HyperText Transfer Protocol (HTTP)/HyperText Transfer Protocol over Secure Socket Layer
(HTTPS)
Simple Mail Transfer Protocol (SMTP)
Internet Control Message Protocol (ICMP)
Internet Group Management Protocol (IGMP)
Address Resolution Protocol (ARP)
Advanced Digi Discovery Protocol (ADDP)

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Following is an overview of some of the services provided by these protocols.
Serial data communication over TCP and UDP
ConnectPort LTS products support serial data communication over TCP and UDP. Key features
include:
Serial data communication over TCP, also known as autoconnect and tcpserial can
automatically perform the following functions:
–Establish bidirectional TCP connections, known as autoconnections, between the serial device
and a server or other network device. Autoconnections can be made based on data and or
serial hardware signals.
–Control forwarding characteristics based on patterns
–Allow incoming raw, Telnet, and SSL/TLS (secure-socket) connections
Serial data communication over UDP, also known as udpserial, can automatically perform the
following functions:
–Digi Connect products can automatically send serial data to one or more devices or systems
on the network using UDP sockets. Options for sending data include whether specific data
is on the serial line, a specific time period has elapsed, or after the specified number of
bytes has been received on the serial port.
–Control forwarding characteristics based on patterns.
–Support incoming datagrams from multiple destinations.
–Support outgoing datagrams sent to multiple destinations.
TCP/UDP forwarding characteristics.
Extended communication control on TCP/UDP data paths.
–Timeout
–Hangup
–User-configurable Socket ID string (text string identifier on autoconnect only)
Dynamic Host Configuration Protocol (DHCP)
Dynamic Host Configuration Protocol (DHCP) can be used to automatically assign IP addresses,
deliver TCP/IP stack configuration parameters such as the subnet mask and default router, and
provide other configuration information. For further details, see "Alternate methods for assigning an
IP address.‖ on page 39.

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Auto-IP
Auto-IP is a protocol that will automatically assign an IP address from a reserved pool of standard
Auto-IP addresses to the computer on which it is installed. ConnectPort LTS is set to obtain its IP
address automatically from a DHCP server. But if the DHCP server is unavailable or nonexistent,
Auto-IP will assign the device an IP address. For further details, see "IP address assignment
alternatives.‖
Simple Network Management Protocol (SNMP)
Simple Network Management Protocol (SNMP) is a protocol for managing and monitoring network
devices. SNMP architecture enables a network administrator to manage nodes--servers,
workstations, routers, switches, hubs, etc.--on an IP network; manage network performance, find
and solve network problems, and plan for network growth. ConnectPort LTS products support
SNMP Versions 1, 2, and 3. For more information on SNMP as a device-management interface, see
"Simple Network Management Protocol (SNMP).‖
Supported RFCs and MIBs
ConnectPort LTS products support these SNMP-related Request for Comments (RFCs) and
Management Information Bases (MIBs):
RFC 1213 - Management Information Base (MIB) II
RFC 1215 - Generic Traps (coldStart, linkUp, authenticationFailure, Login only)
RFC 1316 - Character MIB
RFC 1317 - RS-232 MIB
DIGI-DEVICE-INFO.mib - A Digi enterprise MIB for displaying device information.
DIGI-SERIAL-ALARM-TRAPS.mib - A Digi enterprise MIB for sending alarms as SNMP
traps.
DIGI-CONNECPORT-LTS.mib - A Digi enterprise MIB for configuring ConnectPort LTS.
Supported SNMP traps
SNMP traps can be enabled or disabled. Supported SNMP traps include:
Authentication failure
Login
Cold start
Link up
Alarms can be issued in the form of SNMP traps

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Secure Sockets Layer (SSL)/Transport Layer Security (TLS)
Secure Sockets Layer (SSL)/Transport Layer Security (TLS) are used to provide authentication and
encryption for ConnectPort LTS products. For more information, see ‖Security features.‖
Telnet
ConnectPort LTS products support the following types of Telnet connections:
Telnet Client
Telnet Server
Reverse Telnet, often used for console management or device management
Telnet Autoconnect
For more information on these connections, see "Supported connections and data paths.‖ Access to
Telnet network services can be enabled or disabled.
Remote Login (rlogin)
Users can perform logins to remote systems (rlogin). Access to rlogin service can be enabled or
disabled.
Line Printer Daemon (LPD)
The Line Printer Daemon (LPD) allows network printing over a serial port. Each serial port has a
dedicated LPD server that is independently configurable. Access to LPD service can be enabled or
disabled.
HyperText Transfer Protocol (HTTP)
HyperText Transfer Protocol over Secure Socket Layer (HTTPS)
ConnectPort LTS products provide web pages for configuration that can be secured by requiring a
user login.
Internet Control Message Protocol (ICMP)
ICMP statistics can be displayed, including the number of messages received, bad messages
received, and destination unreachable messages received.

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Point-to-Point Protocol (PPP)
The Point-to-Point Protocol (PPP) transports multi-protocol packets over point-to-point links. PPP
encapsulates the data packet, allows the server to inform the dial-up client of its IP address (or client
to request the IP address), authenticates the exchange, negotiates multiple protocols, and
reassembles the data packet for network communication.
Advanced Digi Discovery Protocol (ADDP)
The Advanced Digi Discovery Protocol (ADDP) runs on any operating system capable of sending
multicast IP packets on a network. ADDP allows the system to identify all ADDP-enabled
ConnectPort LTS products attached to a network by sending out a multicast packet. The
ConnectPort LTS products respond to the multicast packet and identify themselves to the client
sending the multicast. ADDP needs to communicate with the TCP/IP stack using UDP. The TCP/IP
stack should be able to receive multicast packets and transmit datagrams on a network. Not all Digi
devices support ADDP. Access to ADDP service can be enabled or disabled, but the network port
number for ADDP cannot be changed from its default.
Secure Shell (SSH)
ConnectPort LTS units support the following types of Secure Shell (SSH) connections: Reverse
SSH and SSH Autoconnect. Limited use of SSH via SSH client is available from the Linux
command line/bash shell. For more information on these connections, see "Supported connections
and data paths.‖ Access to Secure Shell network services can be enabled or disabled.