Sena STS Series User manual

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Secure Terminal Server
STS Series
User Guide
Version 1.3.3
2005-11-08

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Copyright Information
Copyright 1998-2005, Sena Technologies, Inc. All rights reserved.
Sena Technologies reserves the right to make any changes and improvements to its product without
providing prior notice.
Trademark Information
HelloDevice™is a trademark of Sena Technologies, Inc.
Windows® is a registered trademark of Microsoft Corporation.
Ethernet® is aregistered trademark of XEROX Corporation.
Notice to Users
Proper back-up systems and necessary safety devices should be utilized to protect against injury,
death or property damage due to system failure. Such protection is the responsibility of the user.
This device is not approved for use as a life-support or medical system.
Any changes or modifications made to this device without the explicit approval or consent of Sena
Technologies will void Sena Technologies of any liability or responsibility of injury or loss caused by
any malfunction.
Technical Support
Sena Technologies, Inc.
210 Yangjae-dong, Seocho-gu
Seoul 137-130, Korea
Tel: [phone]
Fax: [phone]
E-Mail: [e-mail]
Website: http://www.sena.com

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Revision history
Revision Date Name Description
V1.0.2 2003-12-3 O.J. Jung Initial Release
V1.1.0 2004-01-12 O.J. Jung Revision with release of version 1.1.0
V1.1.1 2004-01-30 O.J. Jung Typographical errors are fixed
V1.2.0 2004-06-11 O.J. Jung Revision with release of version 1.2.0
V1.3.0 2004-10-11 O.J. Jung Revision with release of version 1.3.0
V1.3.1 2004-10-15 O.J. Jung Added Appendix 6
V1.3.2 2005-05-18 O.J. Jung Appendix 7 is added, PC Card List is updated,
The description about DSR behavior is corrected.
Typographical errors are fixed.
V1.3.3 2005-11-08 Hunn Lee Temperature and Humidity update

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Contents
1. Introduction 7
1.1. Overview...................................................................................................................................7
1.2. Package Check List...................................................................................................................8
1.3. Product Specification.................................................................................................................9
1.4. Terminologies and acronyms...................................................................................................10
2. Getting Started 12
2.1. Panel Layout...........................................................................................................................12
2.1.1. STS800 Panel Layout.....................................................................................................12
2.1.2. STS1600 Panel Layout...................................................................................................13
2.2. Connecting the Hardware........................................................................................................13
2.2.1. Connecting the power.....................................................................................................13
2.2.2. Connecting to the network..............................................................................................14
2.2.3. Connecting to the device ................................................................................................15
2.2.4. Accessing the System Console.......................................................................................15
2.2.5. Using the System console ..............................................................................................16
2.2.6. Using Remote console....................................................................................................17
2.3. Accessing the Web Browser Management Interface ...............................................................18
3. Network Configuration 21
3.1. IP Configuration.......................................................................................................................21
3.1.1. Using a Static IPAddress................................................................................................22
3.1.2. Using DHCP ...................................................................................................................23
3.1.3. Using PPPoE..................................................................................................................24
3.2. SNMP Configurations..............................................................................................................25
3.2.1. MIB-II System objects Configuration...............................................................................26
3.2.2. Access Control Configuration..........................................................................................27
3.2.3. Trap Receiver Configuration ...........................................................................................27
3.2.4. Management using SNMP..............................................................................................27
3.3. Dynamic DNS Configuration....................................................................................................28
3.4. SMTP Configuration................................................................................................................29
3.5. IP Filtering...............................................................................................................................30
3.6. SYSLOG server configuration.................................................................................................32
3.7. NFS server configuration.........................................................................................................32
3.8. Ethernet configuration.............................................................................................................33
3.9. Web server configuration.........................................................................................................34
3.10. TCP service configuration......................................................................................................34
4. Serial Port Configuration 36

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4.1. Overview.................................................................................................................................36
4.2. Individual Port Configuration ...................................................................................................39
4.2.1. Port Enable/Disable........................................................................................................40
4.2.2. Port Title .........................................................................................................................40
4.2.3. Apply All Port Settings.....................................................................................................40
4.2.4. Host Mode Configuration ................................................................................................41
4.2.5. Remote host configuration..............................................................................................49
4.2.6. Port IP filtering configuration...........................................................................................50
4.2.7. Cryptography configuration.............................................................................................51
4.2.8. Serial port parameters ....................................................................................................56
4.2.9. Modem configuration ......................................................................................................59
4.2.10. Port Logging .................................................................................................................60
4.2.11. Port event handling configurations................................................................................62
4.3. All Port Configurations.............................................................................................................66
5. PC Card Configuration 68
5.1. LAN Card Configuration ..........................................................................................................69
5.2. Wireless LAN Card Configuration............................................................................................70
5.3. Serial Modem Card Configuration ...........................................................................................72
5.4.ATA/IDE Fixed Disk Card Configuration...................................................................................72
6. System Administration 74
6.1. System Status .........................................................................................................................74
6.2. System Logging.......................................................................................................................74
6.3. User Logged on List................................................................................................................76
6.4. Change Password...................................................................................................................77
6.5. Device Name Configuration.....................................................................................................77
6.6. Date and Time Settings...........................................................................................................77
6.7. Configuration management.....................................................................................................78
6.8. Firmware Upgrade...................................................................................................................80
6.9. User File Uploading.................................................................................................................83
7. System Statistics 85
7.1. Network Interfaces Statistics ...................................................................................................85
7.2. Serial Ports Statistics...............................................................................................................85
7.3. IP Statistics..............................................................................................................................86
7.4. ICMP Statistics........................................................................................................................88
7.5. TCP Statistics..........................................................................................................................90
7.6. UDP Statistics..........................................................................................................................92
8. CLI guide 93
8.1. Introduction .............................................................................................................................93

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8.2. Flash partition..........................................................................................................................93
8.3. Supported Linux Utilities..........................................................................................................94
8.3.1. Shell & shell utilities:.......................................................................................................94
8.3.2. File and disk utils:...........................................................................................................94
8.3.3. System utilities:...............................................................................................................94
8.3.4. Network utilities:..............................................................................................................94
8.4.Accessing CLI as root or system administrator........................................................................94
8.5. Examples ................................................................................................................................94
8.5.1. Disabling the Telnet Port of the Unit................................................................................94
8.5.2. Periodical program execution..........................................................................................96
Appendix 1. Connections 97
A 1.1. Ethernet Pin outs..................................................................................................................97
A 1.2. Console and Serial port pin-outs..........................................................................................97
A 1.3. Ethernet Wiring Diagram......................................................................................................98
A 1.4. RS232 Serial Wiring Diagram ..............................................................................................98
Appendix 2. PC card supported by STS 100
Appendix 3. STS Configuration files 102
A 3.1. System.cnf .........................................................................................................................102
A 3.2. Redirect.cnf........................................................................................................................104
Appendix 4. Well-known port numbers 108
Appendix 5. Guide to the Bootloader menu program 109
A 5.1. Overview............................................................................................................................109
A 5.2. Main menu .........................................................................................................................109
A 5.3. RTC configuration menu ....................................................................................................109
A 5.4. Hardware test menu...........................................................................................................110
A 5.5. Firmware upgrade menu....................................................................................................114
Appendix 6. Using STS Series with Serial/IP 116
A 6.1. STS Series vs. Serial/IP options.........................................................................................116
A 6.2. Connection example - Telnet and SSLv3 encryption..........................................................117
Appendix 7. How to make a certificate for SSL encryption 121
A 7.1. Install the OpenSSL package.............................................................................................121
A 7.2. Make root CA (for Self-signed)...........................................................................................121
A 7.3. Making a certificate request ...............................................................................................123
A 7.4. Signing a certificate request...............................................................................................123
A 7.5. Making certificate for STS..................................................................................................124

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1. Introduction
1.1. Overview
The STS Series is a secure terminal server (or device server) that makes your legacy serial devices
manageable by industry-standard Ethernet network. Based on open network protocols such as TCP/IP
and UDP, it gives you ultimate flexibility to your serial devices. With PPPoE (PPP-over-Ethernet)
connection feature of the STS Series, the RS232 serial devices could be managed over DSL-based
broadband network.
With the rich broadband network connectivity protocols such as DHCP, PPPoE and Dynamic
DNS, you could easily manage the legacy serial devices over broadband Internet by using DSL or
cable modem connection. The built-in Dynamic DNS protocol of the STS Series enables you to access
the serial devices with their domain names.
The STS Series also provides you with full-featured system management functionality of system
status display, firmware upgrade, remote reset and system log display by using various ways such as
telnet, serial console port or web.
You could easily configure and administrate the STS Series, with the full-featured management
functions of status monitor, remote reset, error log monitor and firmware upgrade by using Telnet and
serial console port under the password protection support.
For critical applications of secure data communication, the STS Series supports SSLv2, SSLv3
and TLSv1 for data encryption. In addition, IP address filtering function is provided for protecting
unintentional data streams to be transmitted to the STS Series.
Typical application areas of the STS Series are:
- Industrial automation
- Network management
- Retail/Point of sale
- Remote metering
- Remote display
- Building automation
- Security/Access control systems
- General data acquisition application
- Medical application
The STS Series gives you ideal remote management capability of control, monitoring, diagnosis and
data gathering over RS232 serial devices.
Please note that this manual assumes user knowledge of Internetworking protocols and
serial communications.

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1.2. Package Check List
- STS Series external box
- External 110V or 230V power supply or power cord
- CAT5 cable
- Console cable kit
- Quick Start Guide
- CD-ROM, including the Serial/IP Com Port Redirector, HelloDevice-IDE, HelloDevice Manager
and manuals

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1.3. Product Specification
STS800 STS1600
8-port 16-port
Serial speeds 75bps to 230Kbps
Flow Control:
Hardware RTS/CTS, Software Xon/Xoff
RJ45 connector
Signals:
RS232 Rx, Tx, RTS, CTS, DTR, DSR, DCD, GND
Serial Interface
Modem controls: DTR/DSR and RTS/CTS
10/100 Base-Tx Ethernet with RJ45 Ethernet connector
Network Interface Supports static and dynamic IP address
Protocols - ARP, IP/ICMP, TCP, UDP, Telnet, SSH v1 & v2,
- SSL v2 & v3, TLS v1
- DNS, Dynamic DNS, HTTP, HTTPS,
- SMTP with/without Authentication, pop-before SMTP,
- DHCP client, NTP, PPPoE, SNMP v1 & v2
PCMCIA Supports one of the following PC cards:
ATA flash memory card
802.11b Wireless LAN card
10/100 Base-TX LAN Card
Modem card
User ID & Password
HTTPS
Secure terminal interface: SSH
Data Encryption: SSLv2/v3, TLS v1, 3DES and RC4
IP address filtering
Security
SCP
Modem emulation Full support for AT commands
Web, Telnet or Serial console port or HelloDevice Manager
O/S support: Windows 98/ME/NT/2000/XP
System log
Automatic email delivery of error log
System statistics
Full-featured system status display
Management
Firmware
Stored in Flash memory and upgradeable via serial console, telnet or web
Diagnostic LED Power
Ready
10/100 Base Link, Act
Serial InUse/Rx/ Tx for each port
PC Card
Environmental Operating temperature: 0’C to 50’C
Storage temperature: –20’C to 66’C
Humidity: 90% Non-condensing
Power 5VDC, 1.5A @ 5VDC 110 ~ 240VAC
245 x 153 x 30 (mm) 432 x 193 x 44.5Dimension
L x W x H (mm) DIN-rail mount option 19 in. rack mountable
Weight (kg) 1.5 2.8
Certification FCC(A), CE(A), MIC

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Warranty 5-year limited warranty
1.4. Terminologies and acronyms
This section will define commonly used terms in this manual. These terms are related to
Internetworking, and defined in regards to their use with STS Series.
 MAC address
On a local area network or other network, the MAC (Media Access Control) address is the computer's
unique hardware number. (On an Ethernet LAN,it is the same as the Ethernet address.)
It is a unique 12-digit hardware number, which is composed of 6-digit OUI (Organization Unique
Identifier) number and 6-digit hardware identifier number. The STS Series has the following MAC
address template: 00-01-95-xx-xx-xx. The MAC address can be found on the bottom of the original
package.
 Host
A user’s computer connected to the network
Internet protocol specifications define "host" as any computer that has full two-way access to
other computers on the Internet. A host will have a specific "local” or “host number" that, together with
the network number, forms its unique IP address.
 Session
A series of interactions between two communication end points that occur during the span of a single
connection
Typically, one end point requests a connection with another specified end point. If that end point
replies, agreeing to the connection, the end points take turns exchanging commands and data ("talking
to each other"). The session begins when the connection is established at both ends and terminates
when the connection is ended.
 Client/Server
Client/server describes the relationship between two computer programs in which one program, the
client, makes a service request from another program, the server, which fulfills the request.
A server is a computer program that provides services to other computer programs on one or
many computers. The client is the requesting program or user in a client/server relationship. For
example, the user of a Web browser is effectively making client requests for pages from servers all
over the Web. The browser itself is a client in its relationship with the computer that is getting and
returning the requested HTML file. The computer handling the request and sending back the HTML file
is a server.

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Table 1-1 Acronym Table
ISP Internet Service Provider
PC Personal Computer
NIC Network Interface Card
MAC Media Access Control
LAN Local Area Network
UTP Unshielded Twisted Pair
ADSL Asymmetric Digital Subscriber Line
ARP Address Resolution Protocol
IP Internet Protocol
ICMP Internet Control Message Protocol
UDP User Datagram Protocol
TCP Transmission Control Protocol
DHCP Dynamic Host Configuration Protocol
SMTP Simple Mail Transfer Protocol
FTP File Transfer Protocol
PPP Point-To-Point Protocol
PPPoE Point-To-Point Protocol over Ethernet
HTTP HyperText Transfer Protocol
DNS Domain Name Service
DDNS Dynamic Domain Name Service
SNMP Simple Network Management Protocol
RADIUS Remote Access for Dial-In User Service
SSH Secure Shell
NTP Network Time Protocol
UART Universal Asynchronous Receiver/Transmitter
Bps Bits per second (baud rate)
DCE Data Communications Equipment
DTE Data Terminal Equipment
CTS Clear to Send
DSR Data Set Ready
DTR Data Terminal Ready
RTS Request To Send
DCD Data Carrier Detect

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2. Getting Started
This chapter describes how to set up and configure the STS Series.
- 2.1 Panel Layout explains the layout of the panel and LED indicators.
- 2.2 Connecting the Hardware describes how to connect the power, the network, and the
equipment to the STS Series.
- 2.3 Accessing the Web Browser Management Interface describes how to access the console
port using a serial console or a Telnet or Web menu from remote location.
The following items are required to get started.
- One power cable (included in the package)
- Console and Ethernet cables (included in the package)
- Cable kit (included in the package)
- One PC with Network Interface Card (hereafter, NIC) and/or one RS232 serial port.
2.1. Panel Layout
2.1.1. STS800 Panel Layout
The STS800 has three groups of LED indicator lamps to display the status, as shown in Figure 2-1
and Figure 2-2 (i.e. System, Ethernet and Serial ports). The first three lamps on the left side indicate
Power, Ready and PC Card interface. The next three lamps are for Ethernet 100Mbps, Link and Act.
Next lamps indicate InUse, Receive and Transmit of the serial ports.
Table 2-1 describes the function of each LED indicator lamp. The rear panel shows the serial ports
with RJ45 connector, Ethernet port, the STS800 console port and the power socket.
Figure 2-1 The panel layout of the STS800
Table 2-1 LED indicator lamps of the STS Series

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Lamps Function
Power Turned on if power is supplied
Ready Turned on if system is ready to run
System
PC card Turned on if a PCMCIA device is running
100Mbps Turned on if 100Base-TX connection is detected
LINK Turned on if connected to Ethernet network
Ethernet
Act Blink whenever there is any activities such as incoming or outgoing packets
through the STS Series Ethernet port
InUse Turned on if the serial port is in use (Port buffering enabled or port access in
use)
Serial port
Rx/Tx Blink whenever there is any incoming or outgoing data stream through the
serial port of the STS Series
2.1.2. STS1600 Panel Layout
The STS1600 has three groups of LED indicator lamps to display the status, as shown in Figure 2-2
(i.e. System, Ethernet and Serial ports). The first three lamps on the left side indicate Power, Ready
and PCMCIA interface. The next three lamps are for Ethernet 100Mbps, Link and Act. Next lamps
indicate InUse, Receive and Transmit of the serial ports.
Table 2-1 describes the function of each LED indicator lamp.
Figure 2-2 The panel layout of the STS1600
2.2. Connecting the Hardware
This section describes how to connect the STS Series to the equipment for initial testing.
- Connect a power source to the STS Series
- Connect the STS Series to an Ethernet hub or switch
- Connect the device
2.2.1. Connecting the power
Connect the power cable to the STS Series. If the power is properly supplied, the [Power] lamp will
light up green.

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Figure 2-3 Connecting the power to the STS800
Figure 2-4 Connecting the power to the STS1600
2.2.2. Connecting to the network
Plug one end of the Ethernet cable to the STS Series Ethernet port. The other end of the Ethernet
cable should be connected to a network port. If the cable is properly connected, the STS Series will
have a valid connection to the Ethernet network. This will be indicated by:
The [Link] lamp will light up green.
The [Act] lamp will blink to indicate incoming/outgoing Ethernet packets
The [100Mbps] lamp will light up green if the STS Series is connected to 100Base-TX network
The [100Mbps] lamp will not turn on if the current network connection is 10Base-T.

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Figure 2-5 Connecting a network cable to the STS800/1600
2.2.3. Connecting to the device
Connect the console cable to the STS Series serial port. To connect to the console port of the device,
the user needs to consider the type of console port provided by the device itself. In the STS Series
cable kit package, plug-in adapters are provided for the easier connectivity to the user’s devices.
Please refer to the Appendix 1 Connections for details.
Figure 2-6 Connecting a equipment to the STS800(Left) / STS1600(Right)
2.2.4. Accessing the System Console
There are several ways to access the STS Series. These methods are dependent on whether the user
is located at a local site or a remote site, or whether s/he requires a menu-driven interface, graphic
menu system or CLI (Command Line Interface).

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 System console:
Local users can connect directly to the system console port of the STS Series using the
console/Ethernet cable with the corresponding adapter.
 Remote console:
Remote users who require a menu-driven interface can utilize Telnet (port 23) connections to the
STS Series using terminal emulator.
 Web:
Remote users who want to use a web browser to configure the STS Series can connect to the
STS Series using conventional web browsers, such as Internet Explorer or Netscape Navigator.
The above methods require the user authentication by the STS Series system.
2.2.5. Using the System console
1) Connect one end of the console/Ethernet cable to the console port on the STS Series.
Figure 2-7 Connecting a system console cable to the STS Series
2) Connect to the user’s computer with the RJ45-DB9 female adapter.
3) Connect the other end of the cable to the serial port of the user’s computer.
4) Run a terminal emulator program (i.e. HyperTerminal). Set up the serial configuration
parameters of the terminal emulation program as follows:
 9600 Baud rate
 Data bits 8
 Parity None
 Stop bits 1
 No flow control
5) Press the [ENTER] key.
6) Enter your user name and password to log into the STS Series. The factory default user

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settings are as follows.
Login: root Password: root
Login: admin Password: admin
192.168.161.5 login: root
Password:****
[email protected].5:~#
7) Upon authentication, the CLI are initially provided for configuration. For details on the CLI,
refer to the chapter 8CLI guide.
8) “ss.edit” command will allow you to enter the text-menu driven interface and the menu screen
in Figure 2-8 is displayed.
[email protected].5:~#ss.edit
------------------------------------------------------------------------------
Welcome to STS-800 configuration page
Current time: 08/22/2003 21:52:36 F/W REV.: v1.0.1
Serial No.: STS800438349-42944 MAC address: 00-01-95-04-19-5a
IP mode: DHCP IP address: 192.168.14.7
------------------------------------------------------------------------------
Select menu:
1. Network configuration
2. Serial port configuration
3. PC Card configuration
4. System administration
5. Save changes
6. Exit without saving
7. Exit and apply changes
8. Exit and reboot
<Enter> Refresh
-----> Figure 2-8 The main menu screen (STS800)
From the main menu screen, the user may select the menu item for the configuration of the STS
Series parameters by typing the menu number and pressing the [ENTER] key. In the submenu screen,
users can configure the required parameters guided by online comments. All the parameters are
stored into the non-volatile memory space of the STS Series, and it will not be stored until users select
menu ”5.Save changes”. All the configuration change will be effective after selecting the menu “7. Exit
and apply changes” or “8. Exit and reboot”.
2.2.6. Using Remote console
The IP address of the STS Series must be known before users can access the STS Series using the
Remote console (see chapter 3 Network Configuration for details). The default IP address of STS

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Series is 192.168.161.5.
The Remote console access function can be disabled in the remote host access option (3.5 IP
Filtering for details).
The following instructions will assist in setting up the Remote Console functionality:
1) Run either a Telnet program or a program that supports Telnet functions (i.e. TeraTerm-Pro
or HyperTerminal). The target IP address and the port number must match the STS Series. If
required, specify the port number as 23. Type the following command in the command line
interface of user’s computer.
telnet 192.168.161.5
Or run a Telnet program with the following parameters:
Figure 2-9 Telnet program set up example (TeraTerm Pro)
2) The user must log into the STS Series. Type the user name and password. A factory default
setting of the user name and password are both root for the system root and admin for the
system administrator.
3) Upon authentication by the STS Series, the CLI prompts or text menu screens are shown.
2.3. Accessing the Web Browser Management Interface
The STS Series supports both HTTP and HTTPS (HTTP over SSL) protocols. The STS Series also
provides has its own Web management pages. To access the STS Series Web management page,
enter the IP address or resolvable hostname of the STS Series into the web browser’s URL/Location

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field. This will direct the user to the STS Series login screen. The user must authenticate themselves
by logging into they system with a correct user name and password. The factory default settings are:
Login: root Password: root
Login: admin Password: admin
Note: Before accessing the STS Series Web management page, the user must check the IP address
(or resolvable Hostname) of the STS Series and Subnet mask settings.
Figure 2-10 Login screen of the STS Series web management
Figure 2-10 shows Login screen of the STS Series web management. After login, user can see the
configuration homepage of the STS Series Web management interface shown Figure 2-11.
Figure 2-11 shows the configuration homepage of the STS Series Web management interface. A
menu bar is provided on the left side of the screen. The menu bar includes the uppermost
configuration menu groups. Selecting an item on the menu bar opens a tree view of all the submenus
available under each grouping. Selecting a submenu item will allow the user to modify parameter
settings for that item. Every page will allow the user to [Save to flash], [Save & apply] or [Cancel] their
actions. After changing the configuration parameter values, the users must select [Save to flash] to
save the changed parameter values to the non-volatile memory. To apply all changes made, the user
must select [Apply Changes]. This option is available on the bottom of the menu bar. Only when the
user selects [Apply changes] will the new parameter values be applied to the STS Series configuration.
The user also can select [Save & apply] to save parameters and apply changes in one step.
If the user does not want to save the new parameter values, the user must opt to [Cancel]. All
changes made will be lost and the previous values restored.

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Figure 2-11 The STS Series web management screen