Seiko NS-2250 User manual

Console server
NS-2250
Before using this console server, carefully read
this instruction manual so you can use the console
server correctly.
After reading this manual, store it in a safe place
so can be accessed easily when necessary.
Instruction Manual

U00135010100 2015 Oct
U00135010101 2016 Jan
U00135010102 2016 Jun
U00135010103 2016 Dec
U00135010104 2017 Apr
© Seiko Solutions Inc., 2015
No copying.
The content of this manual may change without notice.
“SEIKO” is a registered trademark of Seiko Holdings Corporation.
Ethernet is a registered trademark of Fuji Xerox Co., Ltd.
Seiko Solutions Inc. is not responsible for damages caused by this manual or the use of products
described in this manual or the expenses necessary to compensate for such damages.
When you dispose of the NS-2250, observe the regulations of local government. For details, contact
your local goverment.
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case
the user will be required to correct the interference at his own expense.

i
Introduction
Thank you for purchasing the SmartCS NS-2250 console server (hereinafter
referred to as the NS-2250).
This document is the instruction manual for the NS-2250. This manual
describes the specifications, operation methods, maintenance methods, and
other information of the NS-2250, for IT professionals who must remotely
configure/manage the network equipments with serial port.
As shown in the following table, the number of serial ports of the NS-2250
depends on the model you are using. The examples in this manual may
state that the serial port specification is 1-48. Change this value to 1-16 or
1-32 or 1-48 as appropriate for the model you are using.
Power
Model
Number of serial ports
AC power model
NS-2250-16
16 ports
NS-2250-32
32 ports
NS-2250-48
48 ports
For the installation and cable connections of the NS-2250, see the NS-2250
SmartCS console server installation manual (hereinafter referred to as the
Installation manual). For details about commands for the SmartCS, see the
NS-2250 Console server command reference (hereinafter referred to as the
Command Reference).
Before installing the NS-2250, read the following Safety precautions and
Handling precautions.

ii
Safety precautions
Before using the NS-2250, carefully read these safety precautions so you can use the
console server safely.
In this manual, the following symbols are used to call your attention to precautions so that
you can use the NS-2250 safely and prevent damage to equipment.
The following table shows the meaning of these symbols. Understand the content of the
table fully before reading this manual.
Warning
Ignoring the displayed contents and handling the console
server incorrectly may result in death or serious injury.
Caution
Ignoring the displayed contents and handling the console
server incorrectly may result in injury or physical damage.
Examples of symbols
This symbol indicates content that
requires attention (including danger and
warnings).
The display example on th
e left indicates a
warning or precaution.
This symbol indicates a prohibited action.
The display example on the left indicates that
disassembly is prohibited.
This symbol indicates a required action or
an instruction.
The display example on the l
eft indicates
removal of the power plug from the outlet.

iii
Do not disassemble or modify the NS-2250.
Doing so can result in heat generation, fire, electric shock, or malfunction.
Do not remove the metal cover of the NS-2250.
There are no user-serviceable parts inside.
Doing so can result in heat generation, fire, electric shock, or malfunction.
Never use the NS-2250 in a location of extremely high humidity or a location
in which it may be exposed to water or other liquids.
Doing so can result in heat generation, fire, electric shock, or malfunction.
Never drop metal pieces or drip water or other liquids into the interior or gaps
of the NS-2250.
Doing so can result in heat generation, fire, electric shock, or malfunction.
Do not connect or disconnect the power cable or other cables with wet hands.
Doing so can result in electric shock.
Do not block the heat vents of the NS-2250.
Heat generation may cause fire, electric shock, or malfunction.
In the following situations, remove the power plug from the outlet.
Continuing to use the NS-2250 under such abnormal conditions may cause
an accident or fire.
◆When you are repairing the NS-2250 or dealing with errors
◆When you notice unusual odors, smoke, or unusual noises
◆
If metal pieces or water or other liquids enter the interior or gaps of the
NS-2250
◆If the NS-2250 has been dropped or the exterior surface of the NS-2250
has been damaged
Mechanical loading - Mounting of the equipment in the rack should be such
that a hazardous condition is not achieved due to uneven mechanical
loading. Personal injury or equipment damage might result if mishandled.
Warning

iv
Never perform the following actions.
These actions can cause fire, electric shock, accident, or malfunction.
◆Do not place objects on the NS-2250.
◆Do not apply impact to the NS-
2250 with blows or other similar
actions.
◆Do not place the NS-2250 in an unstable location.
◆Do not place objects on cables, twist cables, or pull cables strongly.
Do not install the NS-2250 in the following locations or conditions.
Doing so can result in malfunction.
◆Direct sunlight
◆Severe changes in temperature or humidity
◆Very dusty locations
◆Locations subject to vibrations
◆Near a heating-cooling combination appliance
Always perform the following actions.
Neglecting these actions can cause fire, electric shock, accident, or
malfunction.
◆Always use the NS-2250 at the specified power voltage.
The power voltage of the NS-2250 is displayed on the nameplate on
its bottom surface and near the AC inlet.
◆Potential difference may be generated between the NS-
2250 and
connected equipment depending on the installation environment.
When connecting a cable, do not touch the terminal of the connector
section. Doing so can result in electric shock.
◆
Use an outlet that is near the NS-2250 and can be easily accessed
Always ground the power cable.
Neglecting to ground the power cable can result in fire or electric shock.
In addition, follow the warnings and precautions indicated in each section.
Caution

v
Handling precautions
●Never perform the following actions.
They can result in malfunction of the NS-2250 or USB memory or corrupt the contents of
the USB memory.
・While the STATUS 4 light is on, do not remove the USB memory. If the USB memory
is removed during operation, the operation of the NS-2250 is not guaranteed.
・While the NS-2250 is running normally, do not cut the power of the NS-2250 by
switching off the power switch or pulling out the power cable, or press the RESET
switch.
Before you switch off the power, carry out the “shutdown” command to exit the system
software. Next, either confirm that the “MON>” prompt is displayed on the console or
wait for the STATUS 2 light on the front of the NS-2250 to switch on. Finally, switch off
the power.
・Do not touch the connector of the USB memory with your hand or metal directly.
●To press the RESET switch, use an item with a narrow tip, such as the tip of a ballpoint
pen.
Do not use a mechanical pencil. If the lead of a mechanical pencil breaks and falls inside
the NS-2250, a malfunction may result.
●After you cut the power by the POWER switch off or removing the power cable of the
NS-2250, wait 10 seconds or more before the POWER switch on or inserting the power
cable of the NS-2250.
If power is supplied too quickly, the NS-2250 may not reset normally.
When a redundant power is used, turn off both power.
●Clean the heat vents with a vacuum cleaner or similar device about once every two
months.
●If the exterior of the NS-2250 becomes soiled, soak a soft cloth in a neutral detergent
diluted with water, wring it well, and then wipe the exterior. Next, wipe with a dry cloth.
●This equipment is for indoor use and all the communication wirings are limited to inside of
the building.

vi
Third-party software licenses
Parts of the software of the NS-2250 use the following software. For details of the
licenses of the following software, see Appendix D, “Third-party software licenses”.
SysVinit
SysVinit-tools
bootlogd
busybox
dropbear
e2fsprogs
eglibc
ethtool
freeradius
ftp
iptables
kernel
Linux-PAM
libcap
libgcc
libpcap
linux
logrotate
net-snmp
net-snmp-libs
openssh
openssh-server
pam
pam_tacplus
procps
proftpd
rsyslog
strace
strongswan
tcl
tclx
tcpdump
tcp_wrappers
telnet-server
udev
u-boot
vzctl
xinetd
zlib

Table of contents-1
Table of contents
Chapter 1 Overview of the NS-2250 1-1
1.1 Features and main functions 1-2
1.1.1 Features 1-2
1.1.2 Main functions 1-7
1.2 Part names 1-9
1.2.1 Front of NS-2250 1-9
1.2.2 Rear of NS-2250 1-11
1.3 Interface specifications 1-13
Chapter 2 Functions 2-1
2.1 Port server functions 2-2
2.1.1 Overview of port server functions 2-2
2.1.2 Connect to a port server (Direct mode) 2-4
2.1.3 Connect to a port server (Select mode) 2-6
2.1.4 Port selection menu 2-8
2.1.5 Port server menu 2-13
2.1.6 Port user authentication 2-16
2.1.7 Other port server functions 2-19
2.2 Port log functions 2-20
2.2.1 Overview of the port log function 2-20
2.2.2 Port log save function 2-21
2.2.3 Time stamp function 2-22
2.2.4 Login stamp function 2-23
2.2.5 Port log display function 2-23
2.2.6 Port log sending function (syslog/NFS/FTP/mail) 2-25
2.3 Security functions 2-27
2.3.1 User management/authentication function 2-27
2.3.2 RADIUS authentication / accounting function 2-29
2.3.3 User group identification and access control of serial ports by
RADIUS 2-34
2.3.4 TACACS+ function 2-36
2.3.5 User group identification and access control of serial ports by
TACACS+ 2-41
2.3.6 Control access to servers (allowhost) 2-42
2.3.7 Firewall (ipfilter) 2-43
2.3.8 IPsec 2-45
2.4 Operation management functions 2-46

Table of content-2
Chapter 3 Configuration procedures 3-1
3.1 Start, check, and stop the NS-2250 3-2
3.1.1 Insert an USB memory 3-2
3.1.2 Connect a device management terminal 3-4
3.1.3 Start the NS-2250 3-6
3.1.4 Check the NS-2250 3-7
3.1.5 Stop the NS-2250 3-9
3.2 Set up the NS-2250 3-10
3.2.1 Log in and log out 3-11
3.2.2 Use the CLI 3-13
3.2.3 Insert configuration commands 3-15
3.2.4 Save settings 3-16
3.2.5 Restart the NS-2250 3-18
Chapter 4 Settings 4-1
4.1 Configure the network 4-2
4.1.1 Change the host name or IP address of the NS-2250 4-2
4.1.2 Configure the static routing function 4-7
4.1.3 Configure the DNS client 4-9
4.2 Configure the CONSOLE port 4-10
4.3 Configure the serial ports 4-11
4.4 Configure the port server 4-13
4.4.1 Configure the connection modes (Direct mode/Select mode) 4-13
4.4.2 Show the port server menu 4-14
4.4.3 User authentication of the port server (port user authentication) 4-15
4.4.4 Access control of the port server (connection protocol and
connection mode) 4-15
4.4.5 Connect multiple sessions of the port server 4-15
4.4.6 Change the TCP port number of the port server (Direct mode) 4-16
4.4.7 Add a port user 4-17
4.4.8 Configure labeling of serial ports 4-18
4.4.9 Configure the automatic session disconnection function of the port
server 4-19
4.4.10 Configure other port server functions 4-19
4.5 Configure port logs 4-22
4.5.1 Enable and disable port log functions 4-22
4.5.2 Configure port log size 4-23
4.5.3 Configure time stamps 4-23
4.5.4 Configure login stamps 4-24
4.5.5 Configure email sending 4-25
4.5.6 Configure FTP sending 4-26
4.5.7 Configure syslog sending 4-27
4.5.8 Configure NFS sending 4-29
4.5.9 Check port log settings 4-30
4.6 Configure security settings 4-31
4.6.1 Register and delete users 4-31