Lancom L-54g Wireless User manual

110702/0909
LANCOM Systems GmbH
Adenauerstr. 20/B2
52146 Würselen
Germany
E-Mail: [email protected]
Internet www.lancom.eu
LANCOM L-54g Wireless
LANCOM L-54ag Wireless
LANCOM L-54 dual Wireless
LANCOM L-54g Wireless – LANCOM L-54ag Wireless – LANCOM L-54 dual Wireless
쮿Handbuch
쮿Manual
...connecting your business
110702_LC-L54-L54dual-MANUAL_cov1 1110702_LC-L54-L54dual-MANUAL_cov1 1 03.09.2009 12:33:2203.09.2009 12:33:22

LANCOM L-54g Wireless
LANCOM L-54ag Wireless
LANCOM L-54 dual Wireless

© 2011 LANCOM Systems GmbH, Wuerselen (Germany). All rights reserved.
While the information in this manual has been compiled with great care, it may not be deemed an assurance of product
characteristics. LANCOM Systems shall be liable only to the degree specified in the terms of sale and delivery.
The reproduction and distribution of the documentation and software supplied with this product and the use of its contents
is subject to written authorization from LANCOM Systems. We reserve the right to make any alterations that arise as the
result of technical development.
Windows®, Windows Vista™, Windows NT® and Microsoft® are registered trademarks of Microsoft, Corp.
The LANCOM Systems logo, LCOS and the name LANCOM are registered trademarks of LANCOM Systems GmbH. All other
names or descriptions used may be trademarks or registered trademarks of their owners.
Subject to change without notice. No liability for technical errors or omissions.
Products from LANCOM Systems include software developed by the OpenSSL Project for use in the OpenSSL Toolkit (http:/
/www.openssl.org/).
Products from LANCOM Systems include cryptographic software written by Eric Young ([e-mail]).
Products from LANCOM Systems include software developed by the NetBSD Foundation, Inc. and its contributors.
Products from LANCOM Systems contain the LZMA SDK developed by Igor Pavlov.
LANCOM Systems GmbH
Adenauerstr. 20/B2
52146 Wuerselen
Germany
www.lancom.eu
Wuerselen, Juli 2011
11
0
7
02
/
0
711

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Preface
3
EN
Preface
Thank you for placing your trust in this LANCOM Systems product.
The models LANCOM L-54g Wireless, LANCOM L-54ag Wireless and LANCOM
L-54 dual Wireless offer professional Access Point technology and a maximum
of WLAN performance.
Model variants
This documentation is for users of LANCOM Access Points. The access point is
to choose from different models. These are:
LANCOM L-54g Wireless, complying to the 802.11g standard in the 2,4
GHz band, which is downward-compatible to 802.11b devices. This opens
a vast range of possibilities where to use the LANCOM L-54g Wireless: at
the bureau, in open spaces or to interconnect LANs.
LANCOM L-54ag Wireless operates alternatively either in 802.11g mode
in the 2,4 GHz band, or in 802.11a mode in the 5 GHz band as well.
The LANCOM L-54 dual Wireless operates with two integrated 108-Mbps
wireless modules that comply with the WLAN standards IEEE 802.11a/h
or IEEE 802.11b/g and offers simultaneous operations in the 2.4-GHz and/
or the 5-GHz frequency bands. There is no limit to the range of applica-
tions that the LANCOM L-54 dual Wireless can be used for-be it within
infrastructure networks or as a WLAN bridge for network coupling.
Model
restriction
The sections of the documentation that refer only to a range of models are
marked either in the corresponding text itself or with appropriate comments
placed beside the text.
In the other parts of the documentation, all described models have been clas-
sified under the general term LANCOM Access Point.
Security settings
To maximize the security available from your product, we recommend that you
undertake all of the security settings (e.g. firewall, encryption, access protec-
tion) that were not already activated when you purchased the product. The
LANconfig Wizard 'Security Settings' will help you with this task. Further infor-
mation is also available in the chapter 'Security settings'.
We would additionally like to ask you to refer to our Internet site
www.lancom.eu for the latest information about your product and technical
developments, and also to download our latest software versions.

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Preface
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EN
Components of the documentation
The documentation of your device consists of the following parts:
Installation Guide
User manual
Reference manual
Menu Reference Guide
You are now reading the user manual. It contains all information you need to
put your device into operation. It also contains all of the important technical
specifications.
The Reference Manual is to be found as an Acrobat document (PDF file) at
www.lancom.eu/download or on the CD supplied. It is designed as a supple-
ment to the user manual and goes into detail on topics that apply to a variety
of models. These include, for example:
The system design of the operating system LCOS
Configuration
Management
Diagnosis
Security
Routing and WAN functions
Firewall
Quality of Service (QoS)
Virtual Local Networks (VLAN)
Wireless networks (WLAN)
Backup solutions
Further server services (DHCP, DNS, charge management)
The Menu Reference Guide (also available at www.lancom.eu/download or on
the CD supplied) describes all of the parameters in LCOS, the operating system
used by LANCOM products. This guide is an aid to users during the configu-
ration of devices by means of WEBconfig or the telnet console.
This documentation was created by …
... several members of our staff from a variety of departments in order to
ensure you the best possible support when using your LANCOM product.

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Preface
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EN
Should you find any errors, or if you would like to suggest improvements,
please do not hesitate to send an e-mail directly to:
[email protected]
Our online services www.lancom.eu are available to you around the
clock if you have any questions on the content in this manual, or if you
require any further support. The area 'Support' will help you with
many answers to frequently asked questions (FAQs). Furthermore, the
knowledgebase offers you a large reserve of information. The latest
drivers, firmware, utilities and documentation are constantly available
for download.
In addition, LANCOM Support is available. For telephone numbers
and contact addresses for LANCOM Support, please refer to the
enclosed leaflet or the LANCOM Systems Web site.
Information symbols
Very important instructions. Failure to observe these may result in damage.
Important instruction that should be observed.
Additional information that may be helpful but is not essential.

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Contents
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EN
Contents
1 Introduction 9
1.1 What is a wireless LAN? 9
1.1.1 Modes of operation of wireless LANs and access points
10
1.2 What can your LANCOM do? 10
2 Installation 13
2.1 Package contents 13
2.2 System requirements 13
2.2.1 Configuring the LANCOM devices 13
2.2.2 Operating access points in managed mode 14
2.3 Status displays, interfaces and hardware installation 14
2.3.1 Status displays 14
2.3.2 The connectors 18
2.3.3 Connecting the LANCOM Access Point 21
2.4 Software installation 23
2.4.1 Starting Software Setup 23
2.4.2 Which software should I install? 24
3 Basic configuration 25
3.1 Details you will need 25
3.1.1 TCP/IP settings 26
3.1.2 Configuration protection 27
3.1.3 Settings for the wireless LAN 28
3.2 Instructions for LANconfig 29
3.3 Instructions for WEBconfig 30
3.4 TCP/IP settings for PC workstations 34

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Contents
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EN
4 Security settings 36
4.1 Security in the wireless LAN 36
4.1.1 Encrypted data transfer (802.11i/WPA or WEP) 36
4.1.2 802.1x / EAP 37
4.1.3 LANCOM Enhanced Passphrase Security 37
4.1.4 Access control by MAC address 38
4.1.5 IPSec over WLAN 38
4.2 Tips for the proper treatment of keys and passphrases 39
4.3 Security settings Wizard 39
4.3.1 LANconfig Wizard 40
4.3.2 WEBconfig Wizard 41
4.4 The security checklist 41
5 Advanced wireless LAN configuration 46
5.1 WLAN configuration with the wizards in LANconfig 46
5.2 Point-to-point connections 48
5.2.1 Geometric dimensioning of outdoor wireless network
links 48
5.2.2 Antenna alignment for P2P operations 53
5.2.3 Measuring wireless bridges 55
5.2.4 Activating the point-to-point operation mode 55
5.2.5 Configuration of P2P connections 56
5.2.6 Access points in relay mode 59
5.2.7 Security for point-to-point connections 59
5.3 Client mode 61
5.3.1 Client settings 62
5.3.2 Set the SSID of the available networks 63
5.3.3 Encryption settings 64
6 Setting up Internet access 66
6.1 The Internet Connection Wizard 67
6.1.1 Instructions for LANconfig 67
6.1.2 Instructions for WEBconfig 68

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Contents
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7 Options and accessories 69
7.1 Optional AirLancer Extender antennas 69
7.1.1 Antenna diversity 69
7.1.2 Polarization diversity 70
7.1.3 Installing the AirLancer Extender antennas 70
7.2 LANCOM Public Spot Option 71
8 Troubleshooting 73
8.1 No DSL connection is established 73
8.2 DSL data transfer is slow 73
8.3 Unwanted connections under Windows XP 74
9 Appendix 75
9.1 Performance data and specifications 75
9.2 Contact assignment 76
9.2.1 Ethernet interface 10/100Base-TX, DSL interface 76
9.2.2 Configuration interface (Outband) 76
9.3 Declaration of conformity 77
10 Index 78

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Chapter 1: Introduction
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EN
1Introduction
1.1 What is a wireless LAN?
The following sections describe the functionality of wireless networks
in general. You can see from the table 'What your LANCOM can do'
further below which functions your device supports. Please refer to
the reference manual for further information on this topic.
A wireless LAN connects individual end-user devices (PCs and mobile comput-
ers) to form a local network (also called – Local Area Network). In contrast to
a traditional LAN, communication takes place over a wireless connection and
not over network cables. For this reason it is called a Wireless Local Area Net-
work (WLAN).
A wireless LAN provides the same functionality as a cable-based network:
Access to files, servers, printers etc. as well as the integration of individual
work stations into a corporate mail system or access to the Internet.
There are obvious advantages to wireless LANs: Notebooks and PCs can be
installed where they are needed—problems with missing connections or
structural changes are a thing of the past with wireless networks.
Apart from that, wireless LANs can also be used for connections over longer
distances. Expensive leased lines and the associated construction measures
can be saved.
LANCOM Wireless Routers and LANCOM Access Points can be oper-
ated either as self-sufficient Access Points with their own configura-
tion (WLAN modules in "Access Point mode“) or as components in a
WLAN infrastructure, which is controlled from a central WLAN-
Controller ("managed mode").
Split management can be used to separate the WLAN configuration
from the rest of the router configuration. This allows router settings
and VPN settings to be adjusted locally, for example in a branch office
or home office installation, and the WLAN configuration is regulated
by a LANCOM WLAN Controller at the main office.
Please observe the corresponding notices to this in this documenta-
tion or in the LCOS reference manual.

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Chapter 1: Introduction
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1.1.1 Modes of operation of wireless LANs and access points
Wireless LAN technology and access points in wireless LANs are used in the
following modes of operation:
Simple, direct connection between terminal devices with an access point
(ad-hoc mode)
Extensive wireless LANs, possibly connected to a LAN, with one or more
access points (infrastructure network)
Establishing access to the Internet
Connecting two LANs over a wireless link (point-to-point mode)
Connecting devices with an Ethernet interface via an access point (client
mode)
Extending an existing Ethernet network with a wireless LAN (bridge mode)
Relay function for connecting networks via multiple access points
WDS (Wireless Distribution Systems)
Central administration using a LANCOM WLAN Controller
1.2 What can your LANCOM do?
The following table shows the properties and functions of your device:
LANCOM
L-54g
Wireless
LANCOM
L-54ag
Wireless
LANCOM
L-54 dual
Wireless
Applications
Expansion of the LAN through WLAN (infrastructure mode) ✔✔✔
WLAN via point-to-point and relais mode (2 WLAN modules) ✔
Internet Access ✔✔✔
IP router with Stateful Inspection Firewall ✔✔✔
DHCP and DNS server (for LAN and WLAN) ✔✔✔
N:N mapping for routing networks with the same IP-address ranges over
VPN
✔✔✔
Policy-based routing ✔✔✔
Backup solutions and load balancing with VRRP ✔✔✔
PPPoE Server ✔✔✔

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Chapter 1: Introduction
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EN
WAN RIP ✔✔✔
Spanning Tree protocol ✔✔✔
Layer 2 QoS tagging ✔✔✔
WLAN
Wireless transmission by IEEE 802.11g and IEEE 802.11b ✔✔✔
Wireless transmission by IEEE 802.11a and IEEE 802.11h ✔✔
Wireless transmission by IEEE 802.11b/g and IEEE 802.11a/h at the same
time
✔
Point-to-point mode (six P2P paths can be defined per WLAN interface) ✔✔✔
Access point mode ✔✔✔
Client mode ✔✔✔
Managed mode for central configuration of WLAN modules by a WLAN
Controller
✔✔✔
Relay function to link two P2P connections ✔
Turbo Mode: Double the bandwidth at 2.4 GHz and 5 GHz. ✔✔✔
Super AG incl. hardware compression and bursting ✔✔✔
Multi SSID ✔✔✔
Roaming function ✔✔✔
802.11i / WPA with hardware AES encryption ✔✔✔
WEP encryption (up to 128 Bit key length, WEP152) ✔✔✔
IEEE 802.1x/EAP ✔✔✔
MAC address filter (ACL) ✔✔✔
Individual passphrases per MAC address (LEPS) ✔✔✔
Closed network function ✔✔✔
Integrated RADIUS server ✔✔✔
VLAN ✔✔✔
Intra-Cell Blocking ✔✔✔
LANCOM
L-54g
Wireless
LANCOM
L-54ag
Wireless
LANCOM
L-54 dual
Wireless

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Chapter 1: Introduction
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WLAN QoS (IEEE 802.11e, WME) ✔✔✔
LAN Connection
Fast Ethernet LAN port (10/100Base-TX) ✔✔ 2x
Power over Ethernet (PoE) ✔✔ 2x
redundant
DHCP and DNS server ✔✔✔
WAN Connection
Connection for DSL or cable modem ✔✔✔
Connection for serial modem ✔✔✔
Internet access (IP router)
Stateful-Inspection Firewall ✔✔✔
Firewall filters (IP addresses, ports) ✔✔✔
IP masquerading (NAT, PAT) ✔✔✔
Quality of Service ✔✔✔
Configuration and firmware
Configuration with LANconfig or with web browser, additionally terminal
mode for Telnet or other terminal programs, SNMP interface and TFTP
server function., SSH connection.
✔✔✔
Setup wizards ✔✔✔
FirmSafe with firmware versions for absolutely secure software upgrades ✔✔✔
Monitoring and management of the WLAN with Rogue AP Detection ✔✔✔
Optional software extensions
LANCOM Public Spot Option ✔✔✔
Optional hardware extensions
AirLancer Extender antennas for increased range ✔✔✔
LANCOM Serial Adapter Kit for connection of analog or GSM modems to
the serial interface
✔✔✔
LANCOM
L-54g
Wireless
LANCOM
L-54ag
Wireless
LANCOM
L-54 dual
Wireless

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Chapter 2: Installation
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EN
2 Installation
This chapter will assist you to quickly install hardware and software. First,
check the package contents and system requirements. The device can be
installed and configured quickly and easily if all prerequisites are fulfilled.
2.1 Package contents
Please check the package contents for completeness before starting the
installation. In addition to the base station itself, the package should contain
the following accessories:
If anything is missing, please contact your retailer or the address stated on the
delivery slip of the unit.
2.2 System requirements
2.2.1 Configuring the LANCOM devices
Computers that connect to a LANCOM must meet the following minimum
requirements:
Operating system with TCP/IP support, suchas Windows, Linux, BSD Unix,
Apple Mac OS, OS/2.
Access to the LAN via the TCP/IP protocol.
Wireless LAN adapter or LAN access (if the access point is to be connected
to the LAN).
LANCOM
L-54g
Wireless
LANCOM
L-54ag
Wireless
LANCOM
L-54 dual
Wireless
12 V DC power adapter ✔
18 V DC power adapter ✔✔
Dualband antennas with screw connection 2 4
Singleband antennas with screw connection 2
PoE Ethernet cable (green plugs) ✔✔✔
LANCOM CD ✔✔✔

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Chapter 2: Installation
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The LANtools also require a Windows operating system. A web
browser under any operating system provides access to WEBconfig.
2.2.2 Operating access points in managed mode
LANCOM Wireless Routers and LANCOM Access Points can be operated either
as self-sufficient Access Points with their own configuration ("Access Point
mode“) or as components in a WLAN infrastructure, which is controlled from
a central WLAN-Controller ("managed mode").
For operation in managed mode the Access Points require firmware of
version 7.22 or higher and a current loader (version 1.86 or higher).
2.3 Status displays, interfaces and hardware installation
2.3.1 Status displays
Front side
The LANCOM L-54ag Wireless and LANCOM L-54g Wireless have status dis-
plays on the front panel.
LANCOM L-54 dual
Wireless
LANCOM L-54g
Wireless
LANCOM L-54ag
Wireless
Top panel
Two additional LEDs on the top panel provide a convenient overview of the
most important status information, especially when the device is mounted
vertically.
L-54 dual Wireless
Power
ETH 1
WLAN 1 Link
WLAN 2 Link
ETH 2


L-54ag Wireless
Power
LAN Link
WLAN Link WLAN Data
LAN Data
 

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Chapter 2: Installation
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Meanings of the LEDs
In the following sections we will use different terms to describe the behaviour
of the LEDs:
Blinking means, that the LED is switched on or off at regular intervals in
the respective indicated colour.
Flashing means, that the LED lights up very briefly in the respective col-
our and stay then clearly longer (approximately 10x longer) switched off.
Inverse flashing means the opposite. The LED lights permanently in the
respective colour and is only briefly interrupted.
Flickering means, that the LED is switched on and off in irregular inter-
vals.
Power This LED provides information on the device's operating state.
WLAN Link (1+2)
Power
Off Device switched off
Green blinking Self-test after power-up
Green On (perma-
nently)
Device operational

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Chapter 2: Installation
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The power LED blinks alternately in red/green until a configuration
password has been set. Without a configuration password, the con-
figuration data in the LANCOM is unprotected. Normally you would
set a configuration password during the basic configuration (instruc-
tions in the following chapter). Information about setting a configu-
ration password at a later time is available in the section 'The Security
Wizard'.
WLAN Link or
WLAN Link 1/2
Provides information about the WLAN connections via the internal WLAN
modules.
Red/green Blinking alter-
nately
Device insecure: Configuration password not set
Orange/green In the housing
cover; blinking
alternately with
the online LED
At least one WLAN module is in managed mode and
has not found a WLAN Controller yet. The correspond-
ing WLAN module(s) is/are switched off until a WLAN
Controller is found to supply a configuration, or until
being switched manually into another operating mode.
Orange /red In the housing
cover; blinking
alternately with
the online LED
At least one WLAN module is in managed mode and
has found a WLAN Controller. However, the WLAN
Controller cannot assign a configuration because the
firmware and/or the device's loader version is not com-
patible with the WLAN Controller.
The power LED is blinking and no connection can be
made?
If the power LED blinks red and no WAN connections can be
established, there is no cause for concern. This merely means
that a pre-set charge or time limit has been reached.
There are three ways to remove the lock:
Reset the toll protection.
Increase the limit.
Deactivate the lock completely (set limit to '0').
LANmonitor shows you when a charge or time limit has been reached. To reset the toll protec-
tion, activate the context menu (right-mouse click) Reset charge and time limits. The charge
settings are defined in LANconfig under Management Costs (these settings are only avail-
able if the 'Complete configuration display' is activated under Tools Options).
With WEBconfig, charge protection and all parameters are to be found under LCOS menu tree
Setup Charges Reset budgets.
Power
Power
Signal that a
charge or time
limit has been
reached

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Chapter 2: Installation
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Provides information about the WLAN connections via the internal WLAN
module.
The following can be displayed for WLAN link:
WLAN Data
(LANCOM L-
54g Wireless
and LANCOM
L-54ag
Wireless only)
Provides information about the data traffic at the internal WLAN modules.
Provides information about the data traffic at the internal WLAN module.
The following can be displayed for WLAN data:
ETH
LAN link (only
LANCOM L-
54g Wireless
and LANCOM
L-54ag
Wireless)
Condition of the LAN interface:
Off No WLAN network defined or WLAN module deacti-
vated. The WLAN module is not transmitting beacons.
Green At least one WLAN network is defined and WLAN mod-
ule activated. The WLAN module is transmitting bea-
cons.
Green Inverse flashing Number of flashes = number of connected WLAN sta-
tions and P2P wireless connections, followed by a pause
(default).
Alternatively, the frequency of the flashed can indicate
the received signal strength of a P2P link or the received
signal strength from an access point, to which this
device is connected in client mode.
Green Blinking DFS scanning or other scan procedure.
Red Blinking Hardware error in the WLAN module
Green Flickering TX data traffic.
Red Flickering Error in wireless LAN (TX error, e.g. transmission error
due to a poor connection)
Red Blinking Hardware error in the WLAN module
Off No networking device attached
Green On (perma-
nently)
Connection to network device operational, not data traffic
Green Flickering Data traffic
off no network device connected
green constantly on network device connected; transfer rate 100 Mbps

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Chapter 2: Installation
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LAN Data (only
LANCOM L-
54g Wireless
and LANCOM
L-54ag
Wireless)
Indicating data traffic on the LAN interface:
2.3.2 The connectors
With your LANCOM Access Point the connectors and switches of the base sta-
tion are located on the back panel:
LANCOM L-54 dual
Wireless
LANCOM L-54g
Wireless
LANCOM L-54ag
Wireless
Aux connector for (second) WLAN module. Diversity antennas are con-
nected to the Aux connectors.
Connection for the included power adapter.
Aux connector for (first) WLAN module.
(Second) 10/100base-Tx for the connection to the LAN. 10Mbp- or
100Mbp connections are supported. The used transfer speed will auto-
matically be identified (autosensing).
The LAN connector of the LANCOM Access Point supports the Power-
over-Ethernet standard (PoE). You find further information about operat-
green regularly blinking connection establishing DSL over LAN
green on with short inter-
ruptions
DSL over LAN active (e.g. PPPoE via LAN access)
orange network device connected; transfer rate 100 Mbps (The
device cannot function as directed, since a 10 Mbps fast
connection is too slow for a 54 Mbps fast WLAN data
transmission in the LAN.)
off no data traffic
green flickering data traffic
  
 

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Chapter 2: Installation
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EN
ing with PoE in the info box ’Power-over-Ethernet – elegant power supply
through the LAN wiring’ →Page 20.
By activated DSLoL option, the LAN connector can also be used for con-
necting the LANCOM Access Point to a broadband modem.
(First) Ethernet connector.
Connection for the serial configuration cable.
Main connector for the (second) WLAN module. Additional AirLancer
antennas are connected to the Main connectors if necessary.
Reset switch – has two different functions depending on the length of
time that it is pressed.
Main connector for the (first) WLAN module.
Reset switch of LANCOM L-54 dual Wireless
The reset button offers two basic functions—boot (restart) and reset (to the
factory settings)—which are called by pressing the button for different
lengths of time.
Some devices simply cannot be installed under lock and key. There is
consequently a risk that the configuration will be deleted by someone
pressing the reset button too long. With the suitable setting, the behavior of
the reset button can be controlled accordingly.
Reset button
This option controls the behavior of the reset button when it is pressed:
Ignore: The button is ignored.
Please observe the following notice: The settings 'Ignore' or 'Boot
only' makes it impossible to reset the configuration to the factory set-
tings using the reset button.
If the password is lost for a device with this setting, there is no way to
access the configuration! In this case the serial communications inter-
face can be used to upload a new firmware version to the device-this
resets the device to its factory settings, which results in the deletion
Configuration tool Call
WEBconfig, Telnet Expert configuration > Setup > Config