Lancom DSL Series User manual

LANCOM Wireless DSL Series –
LANCOM Wireless ADSL Series

© 2005 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 included with this product is subject to written per-
mission by LANCOM Systems. We reserve the right to make any alterations that arise as the result of technical develop-
ment.
Trademarks
Windows®, Windows XP®and Microsoft®are registered trademarks of Microsoft, Corp.
The LANCOM Systems logo and the name LANCOM are registered trademarks of LANCOM Systems GmbH. All other names
mentioned may be trademarks or registered trademarks of their respective owners.
Subject to change without notice. No liability for technical errors or omissions.
This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit http://www.openssl.org/.
LANCOM Systems GmbH
Adenauerstr. 20/B2
52146 Wuerselen
Germany
www.lancom.de
Wuerselen, January 2005
11
0320
/
0
1
0
5

LANCOM Wireless DSL – LANCOM Wireless ADSL
Preface
3
EN
Preface
Thank you for placing your trust in this LANCOM product.
With the LANCOM Wireless DSL you have chosen a powerful wireless router
that possesses integrated DSL respectively ADSL and ISDN interfaces by
default as well as an integrated 4-port switch. With this router you can simply
and comfortably connect individual PCs or whole local networks to the high-
speed Internet.
As a base station, the LANCOM Wireless DSL provides numerous central func-
tions and services to the participants of wireless networks and it convinces by
a simple configuration and a reliable continuous operation. With high-effec-
tive technologies, it ensures data security within the whole wireless network.
Security settings
For a carefree use of your device, we recommend to carry out all security set-
tings (e.g. Firewall, encryption, access protection, charge lock), which are not
already activated at the time of purchase of your device. The LANconfig wizard
’Check Security Settings’ will support you accomplishing this. Further informa-
tion regarding this topic can be found in chapter ’Security settings’
→page 69.
We ask you additionally to inform you about technical developments and
actual hints to your product on our Web page www.lancom.de, and to down-
load new software versions if necessary.
User manual and reference manual
The documentation of your device consists of two parts: the user manual and
the reference manual.
You are now reading the user manual. It contains all information you need to
start your LANCOM Wireless DSL. It also contains the most important techni-
cal specification for the device.
The reference manual can be found on the CD as an Acrobat (PDF) document.
It is designed as a supplement to the user manual and goes into detail on top-
ics that apply to a variety of devices. These include for example:
Systems design of the LCOS operating system
Configuration
Management
Diagnosis

LANCOM Wireless DSL – LANCOM Wireless ADSL
Preface
4
EN
Security
Routing and WAN functions
Firewall
Quality of Service (QoS)
Virtual Private Networks (VPN)
Virtual Local Networks (VLAN)
LANCAPI
Further server services (DHCP, DNS, charge management)
Model variants
This user manual applies to the following models of the LANCOM Wireless DSL
series:
LANCOM 1511 Wireless DSL
LANCOM 1521 Wireless ADSL
LANCOM 1811 Wireless DSL
LANCOM 1821 Wireless ADSL
Model
restriction The section 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 Wireless DSL.
This documentation was compiled …
...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.
In case you encounter any errors, or just want to issue critics or enhance-
ments, please do not hesitate to send an email directly to:
[email protected]
Our online services ( www.lancom.de) are available to you around the
clock should you have any queries regarding the topics discussed in
this manual or require any further support. In addition, support from
LANCOM Systems is also available to you. Telephone numbers and

LANCOM Wireless DSL – LANCOM Wireless ADSL
Preface
5
EN
contact information for LANCOM Systems support can be found on a
separate insert, or at the LANCOM Systems website.
Notes symbols
Very important instructions. If not followed, damage may result.
Important instruction should be followed.
Additional instructions which can be helpful, but are not
required.
Special formatting in body text
Bold Menu commands, command buttons, or text boxes
Code Inputs and outputs for the display mode
<Value> Placeholder for a specific value

LANCOM Wireless DSL – LANCOM Wireless ADSL
Contents
6
EN
Contents
1 Introduction 9
1.1 How does ADSL work? 9
1.2 Which use does VPN offer? 12
1.3 What does a router do? 15
1.3.1 Bridgehead to the WAN 15
1.3.2 Areas of deployment for routers 16
1.4 What is a Wireless LAN? 17
1.4.1 Which hardware to use? 17
1.4.2 Operation modes of Wireless LANs and base stations
18
1.5 What can your LANCOM Wireless DSL do? 18
2 Installation 22
2.1 Package contents 22
2.2 System preconditions 22
2.3 Introducing LANCOM Wireless DSL 23
2.3.1 Status displays 23
2.3.2 The back of the unit 29
2.4 Hardware installation 30
2.5 Software installation 32
2.5.1 Starting LANCOM setup 32
2.5.2 Which software should you install? 33
3 Basic configuration 34
3.1 Which information is necessary? 34
3.1.1 TCP/IP settings 34
3.1.2 Configuration protection 36
3.1.3 Settings for the Wireless LAN 36
3.1.4 Settings for the DSL connection 37
3.1.5 Settings for the ISDN connection 37
3.1.6 Connect charge protection 38
3.2 Instructions for LANconfig 38
3.3 Instructions for WEBconfig 40
3.4 TCP/IP settings to workstation PCs 44

LANCOM Wireless DSL – LANCOM Wireless ADSL
Contents
7
EN
4 Setting up Internet access 46
4.1 Instructions for LANconfig 48
4.2 Instructions for WEBconfig 48
5 Linking two networks 49
5.1 What information is necessary? 50
5.1.1 General information 50
5.1.2 Settings for the TCP/IP router 52
5.1.3 Settings for the IPX router 53
5.1.4 Settings for NetBIOS routing 54
5.2 Instructions for LANconfig 55
5.3 Instructions for WEBconfig 55
6 Providing dial-up access 57
6.1 Which information is required? 57
6.1.1 General information 58
6.1.2 Settings for TCP/IP 59
6.1.3 Settings for IPX 60
6.1.4 Settings for NetBIOS routing 60
6.2 Settings for the dial-in computer 61
6.2.1 Dial-up via VPN 61
6.2.2 Dial-up via ISDN 62
6.3 Instructions for LANconfig 62
6.4 Instructions for WEBconfig 63
7 Sending faxes with LANCAPI 64
7.1 Installation of the LANCOM CAPI fax modem 65
7.2 Installation of the MS Windows fax service 66
7.3 Sending a fax 67
7.3.1 Send a fax with any given office application 67
7.3.2 Send a fax with the MS Windows fax service 67
8 Security settings 69
8.1 Security for the Wireless LAN 69
8.1.1 Closed network 69
8.1.2 Access control via MAC address 70
8.1.3 LANCOM Enhanced Passphrase Security 70
8.1.4 Encryption of the data transfer 70

LANCOM Wireless DSL – LANCOM Wireless ADSL
Contents
8
EN
8.1.5 802.1x / EAP 72
8.1.6 IPSec over WLAN 73
8.1.7 Tips for handling keys 73
8.2 The security settings wizard 73
8.2.1 Wizard for LANconfig 74
8.2.2 Wizard for WEBconfig 75
8.3 The firewall wizard 75
8.3.1 Wizard for LANconfig 75
8.3.2 Configuration under WEBconfig 76
8.4 The security checklist 76
9 Options and accessories 80
9.1 Optional AirLancer Extender antennas 80
9.2 LANCOM Public Spot Option 81
10 Troubleshooting 83
10.1 No DSL connection is established 83
10.2 DSL data transfer is slow 83
10.3 Unwanted connections under Windows XP 84
10.4 Cable testing 84
11 Appendix 86
11.1 Performance data and specifications 86
11.2 Radio channels 89
11.2.1 Radio channels in the 2,4 GHz frequency band 89
11.2.2 Radio channels in the 5 GHz frequency band 90
11.2.3 Radio channels and frequency ranges for Indoor
and Outdoor operating 92
11.3 Contact assignment 95
11.3.1 ADSL interface 95
11.3.2 DSL interface 95
11.3.3 ISDN-S0interface 96
11.3.4 Ethernet interfaces 10/100Base-T 96
11.3.5 Configuration interface (Outband) 97
11.4 CE declaration of conformity 97
12 Index 98

LANCOM Wireless DSL – LANCOM Wireless ADSL
Chapter 1: Introduction
9
EN
1Introduction
DSL technology permits high-speed Internet access via conventional tele-
phone lines. DSL features an outstanding price/performance ratio and is very
popular among private users as well as small and mid-sized businesses. All of
the devices of the LANCOM Wireless DSL series are fully-featured routers that
therefore also can be used for providing Internet access to a complete local
network (LAN).
The models of the LANCOM Wireless DSL series offer each a DSL or ADSL con-
nector and also an ISDN connector. The ISDN line can be used as back-up for
the DSL connection, for remote management of the router or as basis for the
office communication via LANCAPI.
In addition to their function as routers between LAN and the Internet, all
models of the LANCOM Wireless DSL series operate also as base stations for
wireless networks. With the base station you link wireless PCs and notebooks
to a network, connect these devices to the existing wired LAN and enable also
the wireless devices to access the Internet.
1.1 How does ADSL work?
For LANCOM 1521
Wireless ADSL and
LANCOM 1821
Wireless ADSL only
Since the late 1980s, scientists have been working on the idea of using con-
ventional telephone lines for video and multimedia applications.
High speed via standard telephone lines
Their approach was based on the use of telephone lines only for the distance
between the subscriber and the next local exchange. From the switching
center, the data is then transferred via high-speed connections to the desired
destination or target network (i.e. the Internet). This minimization of the tel-
Internet splitter
LANCOM Wireless DSL
telephone
phone line
DSL modem
WLAN LAN

LANCOM Wireless DSL – LANCOM Wireless ADSL
Chapter 1: Introduction
10
EN
ephone line distance used permits considerably higher transfer rates than
would be possible when relying solely on the telephone network.
All DSL technologies, of which ADSL is the most common, are based on this
concept. Thanks to their high transfer speeds, DSL connections are well-suited
for Internet access.
Ideal for Internet surfers
The ADSL version of DSL was designed for applications in which the user
receives high volumes of data but only transmits relatively small volumes. A
typical example for this would be access to the world wide web (www). Only
a few commands (mouse clicks) are required to initiate the download of very
large volumes of data such as graphics, texts, audio or video files. The user
typically only sends very small amounts of data across the Internet connec-
tion.
With an ADSL connection, a user can download at up to 8 Mbps (“down-
stream”) and upload at up to 800 Kbps (“upstream”). These maximum rates
can be reduced as required by the ADSL provider. A typical access plan might
specify, for example, 768 Kbps download and 128 Kbps upload speed.
All services via a single cable—thanks to the splitter
With ADSL, all traditional telephony applications (telephone, fax, answering
machine, PBX) can still be used without restrictions. So-called splitters make
this possible. Splitters are devices that separate the telephone line's “voice
frequencies” from the “data frequencies” and ensure that the signals are for-
warded to the appropriate networks. Voice signals are passed on to the exist-
ing telephone network, while data signals are forwarded to their destinations
(i.e. Internet providers) via high-bandwidth network connections.
ADSL connection via
telephone line Internet
Local exchange (central office)
LANCOM Wireless DSL
LAN

LANCOM Wireless DSL – LANCOM Wireless ADSL
Chapter 1: Introduction
11
EN
A splitter is also used at the subscriber end to permit ADSL modems/routers
and conventional telephone equipment to be used at the same time.
In some models (like in the picture above) the ADSL modem is integrated
directly in the router (e.g. LANCOM 1521 Wireless ADSL and LANCOM 1821
Wireless ADSL). Other models like LANCOM 1511 Wireless DSL or LANCOM
1811 Wireless DSL are connected to the splitter using a separate ADSL
modem.
The models LANCOM 1511 Wireless DSL and LANCOM 1811 Wireless
DSL can also utilize other broadband connections (e.g. cable modem)
that offer a 10/100Base-Tx-Ethernet connector over PPPoE, PPTP or
plain Ethernet (with or without DHCP).
The models LANCOM 1521 Wireless ADSL and LANCOM 1821
Wireless ADSL can use this option, if the first LAN ports is configured
as WAN interface.
Router with integrated
ADSL modem
Internet
Splitter
Telephone
Telephone
network
Splitter
ADSL provider
Switching node
DSL access
multiplexer
Subscriber
Router
ADSL
modem
Internet
Splitter
Telephone
Telephone
network
Splitter
ADSL provider
Switching node
DSL access
multiplexer
Subscriber

LANCOM Wireless DSL – LANCOM Wireless ADSL
Chapter 1: Introduction
12
EN
ADSL-over-ISDN or ADSL-over-POTS?
ADSL can operate over modern ISDN telephone service as well as conven-
tional analog service (POTS – Plain Old Telephone Service).
There are, however, different technical specifications for the two telephone
systems. For this reason, devices in the LANCOM Wireless DSL series are
offered in two different versions: A version for ADSL-over-POTS and a version
for ADSL-over-ISDN.
You can determine which telephone system a device supports by looking at
the model description on the bottom of the device. The label containing the
device name also contains an additional code which stands for the telephone
system the device supports:
An 'Annex A' type LANCOM Wireless DSL can only be used with ADSL-over-
POTS service. Similarly, an 'Annex B' device can only be used with ADSL-over-
ISDN service. Retrofitting a device to function with a different telephone sys-
tem is not possible.
ADSL-over-ISDN connections also exist that do not operate in conjunction
with ISDN, but which use a conventional analog telephone connection. A
prominent example would be Deutsche Telekom’s T-DSL service.
1.2 Which use does VPN offer?
For LANCOM 1811
Wireless DSL and
LANCOM 1821
Wireless ADSL only
A VPN (Virtual Private Network) can be used to set up cost-effective, public
IP networks, for example via the ultimate network: the Internet.
The models LANCOM 1811 Wireless DSL and LANCOM 1821 Wireless
ADSL are equipped with 5 active channels by default. The LANCOM
VPN Option. The additional VPN-25 Option can extend VPN support
to 25 tunnels (including hardware acceleration).
While this may sound unspectacular at first, in practice it has profound effects.
To illustrate this, let's first look at a typical corporate network without VPN
Code Supported telephone system
'Annex A' ADSL-over-POTS
'Annex B' ADSL-over-ISDN

LANCOM Wireless DSL – LANCOM Wireless ADSL
Chapter 1: Introduction
13
EN
technology. In the second step, we will see how this network can be optimized
by the deployment of VPN.
Conventional network infrastructure
First, let's have a look at a typical network structure that can be found in this
form or similar forms in many companies:
The corporate network is based on the internal network (LAN) in the head-
quarters. This LAN is connected to the outside world in three ways:
A subsidiary is connected to the LAN, typically using a leased line.
PCs dial into the central network via modem or ISDN connections (Remote
Access Service – RAS).
The central LAN has a connection to the Internet so that its users can
access the Web, and send and receive e-mail.
All connections to the outside world are based on dedicated lines, i.e.
switched or leased lines. Dedicated lines are very reliable and secure. On the
other hand, they involve high costs. In general, the costs for dedicated lines
are dependent on the distance. Especially in the case of long-distance con-
nections, keeping an eye out of cost-effective alternatives can be worthwhile.

Head Office
Workstation in remote
access, e.g. homework
Internet
LAN
LAN
Subsidiary

LANCOM Wireless DSL – LANCOM Wireless ADSL
Chapter 1: Introduction
14
EN
The appropriate hardware must be available in the headquarters for every
type of required connection (analog dial-up, ISDN, leased lines). In addition
to the original investment costs, ongoing costs are also incurred for the
administration and maintenance of this equipment.
Networking via the Internet
The following structure results when using the Internet instead of direct con-
nections :
All participants have fixed or dial-up connections to the Internet. Expensive
dedicated lines are no longer needed.
All that is required is the Internet connection of the LAN in the headquar-
ters. Special switching devices or routers for dedicated lines to individual
participants are superfluous.
The subsidiary also has its own connection to the Internet.
The RAS PCs connect to the headquarters LAN via the Internet.
The Internet is available virtually everywhere and typically has low access
costs. Significant savings can thus be achieved in relation to switched or ded-
icated connections, especially over long distances.
The physical connection no longer exists directly between two participants;
instead, the participants rely on their connection to the Internet. The access



Head Office
Workstation in remote
access
Internet
LAN
LAN
Subsidiary

LANCOM Wireless DSL – LANCOM Wireless ADSL
Chapter 1: Introduction
15
EN
technology used is not relevant in this case: ideally is the use of broadband
technologies such as DSL (Digital Subscriber Line) or G.703 (2-Mbit leased
lines). But also a conventional ISDN line can be used.
The technologies of the individual participants do not have to be compatible
to one another, as would be the case for conventional direct connections. A
single Internet access can be used to establish multiple simultaneous logical
connections to a variety of remote stations.
The resulting savings and high flexibility makes the Internet (or any other IP
network) an outstanding backbone for a corporate network.
1.3 What does a router do?
The following sections describe the functionality of routers in general.
The functions supported by your device are listed in the table ’What
can your LANCOM Wireless DSL do?’ →page 18.
Routers connect LANs at different locations and individual PCs to form a Wide
Area Network (WAN). With the appropriate rights, any computer in this WAN
can access other computers and services of the complete WAN (as with 'PC 1'
accessing 'Server A' in the remote LAN in the diagram).
Connecting a LAN to the Internet does not technically differ from coupling
two LANs. The only difference is that it is not just a handful of computers
behind the Internet provider's router. Instead, it is the net of the networks -
the public Internet.
1.3.1 Bridgehead to the WAN
All routers have at least two connections:
at least one for the LAN
router
LAN 1
PC 1
LAN 2
WAN connection
server A
router

LANCOM Wireless DSL – LANCOM Wireless ADSL
Chapter 1: Introduction
16
EN
at least one for WAN connections
In addition to LAN connectivity (10/100 Mbps Ethernet), several models also
offer an integrated switch. For the connecting to the WAN, the routers use
ISDN, xDSL/cable or ADSL connectors. Several devices contain additionally a
wireless network card and can thus integrate also stations of WLANs (Wireless
LANs) into the routing.
The router's task is to transfer data from the local network to the target net-
work via a suitable WAN connection. Data is also transferred from the WAN
to the desired recipients in the LAN.
1.3.2 Areas of deployment for routers
Routers are mainly used for the following applications:
Internet access for a LAN (e.g. via DSL or ISDN)
The Internet consists of countless large and small networks that are inter-
connected into the world's largest WAN via routers. The router links all the
workstation computers on your local area network to the global Internet.
Security functions such as IP masquerading protect your LAN against
unauthorized access from outside.
LAN to LAN coupling (via VPN or ISDN)
LAN to LAN coupling links individual LANs to form one large network,
even if this means crossing continents. A typical example: A branch office
is to be connected to the LAN of the headquarters. In principle, you can
connect LANs in two ways:
Not possible with
all LANCOM
devices.
High-speed coupling via VPN
The fastest and most economical LAN to LAN links are possible with
VPN (Virtual Private Network) technology, as VPN uses the Internet as
the basis for its communications. The fast xDSL connection of the
router comes into its own here. The precondition: a VPN gateway with
access to the Internet is required on either side of the network inter-
connection.
VPN gateways
VPN tunnel via the
Internet

LANCOM Wireless DSL – LANCOM Wireless ADSL
Chapter 1: Introduction
17
EN
Conventional via ISDN
Without VPN, a LAN to LAN interconnection can alternatively be real-
ized via ISDN. In this case, an intelligent line management and
sophisticated filter mechanisms keeps connection costs low.
Remote access to the company network (via VPN or ISDN)
The work of many office workers in modern organizations is less and less
dependent on any definite location—the most important factor here is
unimpaired access to shared and freely available information.
Remote Access Service (RAS) is the magic word here. Employees working
from home or field staff can dial into the company network via VPN or
ISDN. When working with remote access via ISDN, the router protects the
company network: the call back function only grants access to known and
registered users.
1.4 What is a Wireless LAN?
The following sections describe the functionality of wireless networks
in general. The functions supported by your device are listed in the
table ’What can your LANCOM Wireless DSL do?’ →page 18.
A Wireless LAN connects single terminals (e.g. PCs or notebooks) to a local
network (also LAN – Local Area Network). In contrast to a conventional LAN,
communication takes place via radio links rather than via network cables. This
is the reason why a Wireless LAN is also called a Wireless Local Area Network
(WLAN).
All functions of a cable-bound network are also available in a Wireless LAN:
access to files, servers, printers etc. is as possible as the connection of individ-
ual stations to an internal mail system or to the Internet access.
The advantages of Wireless LANs are obvious: notebooks and PCs can be set
up just where they are needed. Due to Wireless LANs, problems with missing
connections or structural alterations belong to the past.
1.4.1 Which hardware to use?
Each station of the Wireless LAN needs access to the Wireless LAN in the form
of a wireless interface. Devices which have no built-in wireless interface can
be upgraded with a supplement card or an adapter.

LANCOM Wireless DSL – LANCOM Wireless ADSL
Chapter 1: Introduction
18
EN
LANCOM Systems offers wireless adapters by its AirLancer product
line. An AirLancer wireless adapter enables a device (e.g. PC or note-
book) for access to the Wireless LAN.
1.4.2 Operation modes of Wireless LANs and base stations
Wireless LAN technology and base stations in Wireless LANs are used in the
following operation modes:
Simple direct connections between terminals without base station (ad-
hoc mode)
Larger Wireless LANs, connection to LANs with one or more base stations
(infrastructure network)
Passing-through of VPN-encrypted connections with VPN pass-through
Setting-up of an Internet access
Connecting two LANs via a direct radio link (point-to-point mode)
Connecting of devices with Ethernet interface via base stations (client
mode)
Extending an existing Ethernet network with WLAN (bridge mode)
1.5 What can your LANCOM Wireless DSL do?
The following table contains a direct comparison of the properties and func-
tions of your devices with other models:
LANCOM 1511
Wireless DSL
LANCOM 1811
Wireless DSL
LANCOM 1521
Wireless ADSL
LANCOM 1821
Wireless ADSL
Applications
Internet access
LAN to LAN coupling via VPN with 5 active tunnels (dynamic VPN)
LAN to LAN coupling via ISDN
RAS server (via VPN)
RAS server (via ISDN)

LANCOM Wireless DSL – LANCOM Wireless ADSL
Chapter 1: Introduction
19
EN
IP router
IPX router (via ISDN), e.g. for coupling of Novell networks or dialling into
Novell networks
NetBIOS proxy for coupling of Microsoft peer-to-peer networks via ISDN
DHCP and DNS server (for LAN and WAN)
LANCAPI server for the operating with office applications as fax or
answering machine via ISDN interface
Wireless LAN
Wireless transmission by IEEE 802.11g and IEEE 802.11b
Wireless transmission by IEEE 802.11a
Roaming function
WEP encryption:
WEP64, WEP128, WEP152 (up to 128 Bit key length)
IEEE 802.1x/EAP
Multi SSID
Individuelle Passphrases pro MAC-Adresse (LEPS)
WPA – TKIP
802.11i with hardware acceleration
MAC address filter (ACL)
Access to RADIUS server
Closed network function
Traffic lock function
VLAN
LANCOM 1511
Wireless DSL
LANCOM 1811
Wireless DSL
LANCOM 1521
Wireless ADSL
LANCOM 1821
Wireless ADSL

LANCOM Wireless DSL – LANCOM Wireless ADSL
Chapter 1: Introduction
20
EN
WAN connection
Connection for DSL or cable modem 1 1
ADSL Connection
ISDN S0bus in multi device-mode or in point-to-point mode with auto-
matic D-channel protocol identification. Supports static and dynamic
channel bundling per MLPPP and BACP as well as Stac data compression
(Hi/fn)
1) First LAN port can be configured as Ethernet WAN interface
LANCOM 1511
Wireless DSL
LANCOM 1811
Wireless DSL
LANCOM 1521
Wireless ADSL
LANCOM 1821
Wireless ADSL
LAN connection
Integrated 4-port auto-mode-switch (10/100 Mbps) to connect terminals
(workstations etc.) or subordinated switches or hubs.
Support of data packets with VLAN resp. QoS marking for an intelligent
data traffic control within the switch
Security functions
IP masquerading (NAT, PAT) to hide all workstations of the LAN behind
one common public IP address.
Stateful Inspection Firewall
Firewall filters for a selective locking of IP addresses, protocols and ports
MAC address filter control e.g. the access of LAN workstations to IP rout-
ing functions
Configuration protection to block “brute force attacks“
LANCOM 1511
Wireless DSL
LANCOM 1811
Wireless DSL
LANCOM 1521
Wireless ADSL
LANCOM 1821
Wireless ADSL