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myUTN
USB Deviceserver
User Manual
Linux
utnserver Pro
USB Deviceserver User Manual Linux
Manufacturer & Contact
Document
Type: User Manual
Title: USB Deviceserver User Manual Linux
Version: 1.2 | 2021-12
Legal Information
SEH Computertechnik GmbH has endeavored to ensure that the information in this documentation is correct. If
you detect any inaccuracies please inform us at the address indicated above. SEH Computertechnik GmbH will not
accept any liability for any error or omission. The information in this manual is subject to change without notifi-
cation.
The original manual is the German version of this document and shall govern. All non-German versions of this
document are translation of the original manual.
All rights are reserved. Copying, other reproduction, or translation without the prior written consent from SEH
Computertechnik GmbH is prohibited.
These products include 'open source software'. For detailed information, visit https://www.seh-technology.com.
© 2021 SEH Computertechnik GmbH
All trademarks, registered trademarks, logos and product names are property of their respective owners.
SEH Computertechnik GmbH
Suedring 11
33647 Bielefeld
Germany
Phone: +49 (0)521 94226-29
Fax: +49 (0)521 94226-99
Support: +49 (0)521 94226-44
Email: inf[email protected]
Web: https://www.seh-technology.com
USB Deviceserver User Manual Linux
Content
1 General Information........................................................................................ 1
1.1 Product ..............................................................................................................................................................................................2
1.2 Documentation ..............................................................................................................................................................................3
1.3 Support and Service......................................................................................................................................................................5
1.4 Your Safety .......................................................................................................................................................................................6
1.5 First Steps .........................................................................................................................................................................................7
2 Administration Methods................................................................................. 8
2.1 Administration using the utnserver Control Center .........................................................................................................9
2.2 Administration via the SEH UTN Manager......................................................................................................................... 11
2.3 Administration via Email .......................................................................................................................................................... 17
3 Network Settings ........................................................................................... 19
3.1 How to Configure IPv4 Parameters...................................................................................................................................... 20
3.2 How to Configure IPv6 Parameters...................................................................................................................................... 22
3.3 How to Use the UTN Server in VLAN Environments....................................................................................................... 23
3.4 How to Configure the DNS...................................................................................................................................................... 25
3.5 How to Configure Email (POP3 and SMTP)........................................................................................................................ 26
3.6 How to Configure Bonjour ...................................................................................................................................................... 28
4 Device Settings .............................................................................................. 29
4.1 How to Assign a Description................................................................................................................................................... 30
4.2 How to Configure the Device Time...................................................................................................................................... 31
4.3 How to Configure the (Encrypted) UTN Port .................................................................................................................... 32
4.4 How to Assign a Name to a USB Port................................................................................................................................... 33
4.5 How to Write a Description for a USB port ........................................................................................................................ 34
4.6 How to Get Messages................................................................................................................................................................ 35
5 Working with the SEH UTN Manager ........................................................... 37
5.1 How to Find UTN Servers/USB Devices in the Network................................................................................................ 38
5.2 How to Establish a Connection to a USB Device ............................................................................................................. 40
5.3 How to End the Connection between the USB Device and the Client.................................................................... 41
5.4 How to Request an Occupied USB Device......................................................................................................................... 42
5.5 How to Automate USB Device Connections and Program Starts ............................................................................. 43
5.6 How to Find Status Information on USB Ports and USB Devices............................................................................... 45
5.7 How to Use the Selection List and Manage User Access Rights with It................................................................... 47
5.8 How to Use the SEH UTN Manager without Graphical User Interface (utnm)...................................................... 50
6 Security........................................................................................................... 55
6.1 How to Define the Encryption Strength for SSL/TLS Connections........................................................................... 56
6.2 How to Encrypt the USB Connection................................................................................................................................... 58
6.3 How to Encrypt the Connection to the utnserver Control Center............................................................................ 60
6.4 How to Protect Access to the utnserver Control Center
(User Accounts)61
6.5 How to Block UTN Server Ports (TCP Port Access Control).......................................................................................... 62
6.6 How to Control Access to USB Devices............................................................................................................................... 63
6.7 How to Block USB Device Types............................................................................................................................................ 66
6.8 How to Use Certificates ............................................................................................................................................................ 67
USB Deviceserver User Manual Linux
6.9 How to Configure Network Authentication (IEEE 802.1X)........................................................................................... 72
6.10 How to Configure SNMP .......................................................................................................................................................... 75
6.11 How to Disable a USB Port....................................................................................................................................................... 76
7 Maintenance .................................................................................................. 77
7.1 How to Backup Your Configuration..................................................................................................................................... 78
7.2 How to Reset Parameters to their Default Values........................................................................................................... 80
7.3 How to Perform a Device Software Update ...................................................................................................................... 81
7.4 How to Restart the UTN Server .............................................................................................................................................. 82
8 Appendix ........................................................................................................ 83
8.1 Glossary .......................................................................................................................................................................................... 84
8.2 Troubleshooting ......................................................................................................................................................................... 85
8.3 Parameter lists.............................................................................................................................................................................. 87
8.4 SEH UTN Manager – Feature Overview.............................................................................................................................108
1
USB Deviceserver User Manual Linux General Information
1 General Information
• Product  2
• Documentation  3
• Support and Service  5
• Your Safety  6
• First Steps  7
2
USB Deviceserver User Manual Linux General Information
1.1 Product
Purpose
UTN servers comprise USB Deviceservers and USB Dongleservers. As USB Deviceservers, they make non-network-
ready USB devices (e.g. USB hard disk drives, USB printers, etc.) accessible via TCP/IP network. For this purpose, the
USB devices will be connected to the USB ports of the UTN server. Then the UTN (UTN = USB to Network) func-
tionality and the corresponding software tool 'SEH UTN Manager' establish a virtual USB connection between USB
device and client. The USB device can be used as if it were connected locally.
System Requirements
The UTN server has been designed for use in TCP/IP networks.
The SEH UTN Manager can be used in the following systems:
• Microsoft Windows (32/64-Bit; Windows 10, Windows 11 , Server 2012 R2, 2016, 2019, 2022)
• macOS 10.15 (Catalina), macOS 11 (Big Sur)1, macOS 12 (Monterey)2
• Linux (Ubuntu 18.04/20.0.4, Debian 9/10/11, CentOS 7/8, CentOS Stream 8, Oracle 7/8, RHEL 7.4/8.4, Open-
SUSE Leap 15.3, SUSE Linux Enterprise Server 15) 3
• IPv4 TCP/IP network
• IPv6 TCP/IP network
This document describes usage under Linux environments. Information about the usage in other environments
can be found in the relevant system-specific User Manual. More details can be found in chapter ’Documentation’
 4.
1. macOS 11.x (Big Sur) only limited USB device support not running on Apple Silicon (Apple M1 chip) based Macs
2. macOS 12.x (Monterey) only limited USB device support not running on Apple Silicon (Apple M1 chip) based
Macs
3. A successful installation cannot be guaranteed due to the variety of Linux systems! The installation must be car-
ried out under your own responsibility.
3
USB Deviceserver User Manual Linux General Information
1.2 Documentation
Please load all current documents from our Website:
https://www.seh-technology.com/de/service/downloads.html
Further applicable documents
The USB Deviceserver documentation consists of the following documents:
Quick Installation Guide Print, PDF Information on safety, technical data, declarations of con-
formity and description of the hardware installation and
initial setup.
User Manual PDF Detailed description of the UTN server configuration,
administration and maintenance. System-specific instruc-
tions for the following systems:
- Windows
- macOS
- Linux
Online help HTML Information on how to use the 'utnserver Control Center'
web interface.
(Embedded into web interface; no download.)
Product information Print, PDF Features and technical data
Brochures Print, PDF http://www.seh-technology.com
Open source licenses online https://www.seh-technology.com/services/licenses.html
4
USB Deviceserver User Manual Linux General Information
Symbols and Legend
A variety of symbols and mark-ups are used within this document.
WARNING
Warning A warning contains important information that must be heeded. Non-
observance may lead to malfunctions.
Important:
Important information These notes contain crucial information for failure-free operation.
Requirement Requirements that must be met before you can begin the action.
• Numeration Listing
1. Numeration Step-by-step instructions
Result Outcome of a performed action
Tip Recommendations and beneficial advice
 Reference (Within the document you can use hyperlinks.)
Bold Established terms (e.g. of buttons, menu items, or selection lists)
Courier Code (e.g. for command lines or scripts), Paths
'Proper names' Single quotation marks identify proper names
5
USB Deviceserver User Manual Linux General Information
1.3 Support and Service
SEH Computertechnik GmbH offers extensive Support. If you have any questions, please contact us.
Customers from the United States of America (USA) and Canada please contact North American Support:
All information and downloads regarding your product are available on our website:
Monday through Thursday
Friday
8:00 a.m. to 4:45 p.m.
8:00 a.m. to 15:15 p.m.
+49 (0)521 94226-44
support@seh.de
Monday – Friday 9:00 am – 5:00 pm (EST/EDT)
+1-610-933-2088
support@sehtechnology.com
https://www.seh-technology.com
6
USB Deviceserver User Manual Linux General Information
1.4 Your Safety
Read and observe all safety regulations and warnings found in the documentation, on the device and on the pack-
aging. This will avoid potential misuse and prevent damages to people and devices.
Intended Use
The UTN server is used in TCP/IP networks and has been designed for use in office environments. It allows multiple
network users to access non-network-ready USB devices.
Improper Use
All uses of the device that do not comply with the functionalities described in the USB Deviceserver documenta-
tion are regarded as improper use.
Safety Regulations
Before starting the initial setup of the UTN server, read and observe the safety regulations in the 'Quick Installation
Guide'. This document is enclosed in the packaging in printed form.
Warnings
Read and observe all warnings mentioned in this document. Warnings are found before any instructions known
to be dangerous. They are presented as follows:
Liability and Guarantee
SEH Computertechnik GmbH will not accept any liability for personal injuries, property damages and consequen-
tial damages resulting from the non-observance of the mentioned safety regulations and warnings. Non-obser-
vance will also result in any guarantee claims becoming void.
Modifications to the Device and Repairs
It is not allowed to make modifications to the hardware and software or to try to repair the device. If your device
needs to be repaired, contact our support  5.
WARNING
Warning!