ELSA Lancom DSL/10 Office User manual

MELSA LANCOM TM DSL/10 Office
20554
/
0200

© 2000 ELSA AG, Aachen (Germany)
While the information in this manual has been compiled with great care, it may not be deemed an
assurance of product characteristics. ELSA 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 ELSA. We reserve the right to make any
alterations that arise as the result of technical development.
ELSA is DIN EN ISO 9001 certified. The accredited TÜV CERT certification authority has confirmed ELSA
conformity to the worldwide ISO 9001 standard in certificate number 09 100 5069, issued on June 15,
1998.
Trademarks
Windows®, Windows NT®and Microsoft®are registered trademarks of Microsoft, Corp.
The ELSA logo is a registered trademark of ELSA AG. 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.
ELSA AG
Sonnenweg 11
52070 Aachen
Germany
www.elsa.com
Aachen, February 2000

Preface
Thank you for placing your trust in this ELSA product.
By selecting the ELSA LANCOM DSL/10 Office you have chosen a router which you can
use to connect local area networks or single workstations to the Internet via an xDSL
connection. You can now surf the Internet 12 times faster than over a single B channel
in the ISDN network.
The highest quality standards in manufacturing and stringent quality control are the basis
for high product standards and consistent quality of ELSA products.
Documentation
The accompanying documentation comprises:
K
Manual
Hardware installation, description of functions and operating modes and examples
of configurations
K
CD containing electronic documentation
Basic technical information (e.g. on xDSL, general network technology, TCP/IP),
workshop with comprehensive usage examples, reference section with complete
menu description
Our online services (Internet server www.elsa.com) 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 the Support file section under 'Know-How', you can find answers to
frequently asked questions (FAQs). The KnowledgeBase also contains a large pool of
information. Current drivers, firmware, tools and manuals can be downloaded at any
time.
The KnowledgeBase can also be found on the CD. Just open the file \Misc\Support\
MISC\ELSASIDE\index.htm.

Contents
ELSA LANCOM DSL/10 Office
V
Contents
Introduction .................................................................................................................. 1
What does a router do? ........................................................................................ 1
What does the ELSA LANCOM DSL/10 Office offer? .......................................... 2
Installation ...................................................................................................................5
Package contents.................................................................................................. 5
Introducing the ELSA LANCOM DSL/10 Office .................................................... 5
How to connect the router.................................................................................... 7
Software installation ............................................................................................ 8
Basic configuration............................................................................................... 8
Make basic settings with ELSA LANconfig ................................................ 8
Configuring the basic settings using telnet.............................................. 10
Configuration modes ................................................................................................ 11
Many paths lead to the ELSA LANCOM DSL/10 Office ..................................... 11
The user-friendly method: inband....................................................................... 11
Preconditions............................................................................................. 11
Alternatively: Address administration with the DHCP server .................. 12
Beginning configuration using ELSA LANconfig....................................... 12
Start up inband configuration using telnet............................................... 13
Configuration commands ................................................................................... 13
New firmware with FirmSafe ............................................................................. 14
This is how FirmSafe works...................................................................... 14
How to load new software ....................................................................... 15
Configuration using SNMP ................................................................................. 17
General...................................................................................................... 17
Accessing tables and parameters using SNMP ....................................... 18
The Management Information Base (MIB) ............................................... 20
Operating modes and functions ............................................................................. 21
Security for your configuration ........................................................................... 21
Password protection ................................................................................. 21
Login barring ............................................................................................. 22
Access control via TCP/IP ......................................................................... 22
Security for your LAN.......................................................................................... 22
The hiding place—IP masquerading (NAT/PAT) ...................................... 23
TCP/IP packet filters.................................................................................. 23
Call charge management.................................................................................... 23
Time-dependent connection control ......................................................... 23
Settings in the charge module.................................................................. 24
xDSL connections................................................................................................ 24

Contents
ELSA LANCOM DSL/10 Office
VI
Name-list................................................................................................... 26
PPP-list ...................................................................................................... 27
IP routing............................................................................................................. 27
The IP routing table................................................................................... 27
Local routing.............................................................................................. 29
Dynamic routing with IP RIP...................................................................... 29
IP masquerading (NAT, PAT)..................................................................... 31
DNS forwarding ........................................................................................ 32
Policy Based Routing................................................................................. 32
Automatic address administration with DHCP................................................... 33
The DHCP server ....................................................................................... 33
DHCP—'on', 'off' or 'auto'?....................................................................... 33
How are the addresses assigned?............................................................ 34
DNS..................................................................................................................... 36
What does a DNS server do?.................................................................... 36
Setting up the DNS server ........................................................................ 37
Appendix ..................................................................................................................... 41
Technical data..................................................................................................... 41
Declaration of conformity ................................................................................... 42
Warranty conditions ........................................................................................... 43
Index ............................................................................................................................ 45
Description of the menu options (on CD only) .....................................................R1
Status.................................................................................................................. R3
Status/Connection-state........................................................................... R4
Status/Current-time.................................................................................. R4
Status/Operating-time.............................................................................. R4
Status/WAN-statistics.............................................................................. R4
Status/LAN-statistics................................................................................ R6
Status/PPP-statistics................................................................................. R8
Status/TCP-IP-statistics .......................................................................... R13
Status/IP-router-statistics....................................................................... R18
Status/Config-statistics .......................................................................... R20
Status/DSL-statistics.............................................................................. R20
Status/DSL-statistics/PPPoE-statistics................................................... R21
Status/Queue-statistics .......................................................................... R22
Status/Connection-statistics .................................................................. R23
Status/Info-connection ........................................................................... R23
Status/Remote-statistics ........................................................................ R23
Status/Channel-statistics ....................................................................... R24
Status/Time-statistics............................................................................. R25
Status/Delete-values.............................................................................. R25

Contents
ELSA LANCOM DSL/10 Office
VII
Setup................................................................................................................. R25
Setup/WAN-module ............................................................................... R26
Setup/Charges-module........................................................................... R29
Setup/LAN-module ................................................................................. R30
Setup/TCP-IP module.............................................................................. R31
Setup/IP-router-module .......................................................................... R34
Setup/SNMP-module.............................................................................. R42
Setup/DHCP-server-module.................................................................... R43
Setup/DNS module................................................................................. R45
Setup/Config-module.............................................................................. R46
Setup/Time-module ................................................................................ R47
Firmware ........................................................................................................... R47
Other ................................................................................................................. R49

Contents
ELSA LANCOM DSL/10 Office
VIII

Introduction
ELSA LANCOM DSL/10 Office
1
Introduction
The sheer speed of development of computer technology over the last few years has
resulted in a huge increase in the volume of electronic data traffic. More users every day
want to send and receive a constantly increasing volume of data. Conventional
transmission technologies (modem or ISDN devices) are no longer equal to the demand.
New technologies are eliminating the restrictions and are offering the user true
broadband communications at significantly higher transfer speeds. An important
criterion for the spread of these new access technologies is their availability in as many
offices and companies as possible. One new technology is transmission by xDSL, which
covers the “last mile”over conventional copper wires.
The ELSA LANCOM DSL/10 Office gives you a router that has been specially developed
for xDSL terminals.
ELSA LANCOM DSL/10 Office can connect individual workstations or entire local
networks to the Internet. It makes it possible for you to download data from the Internet
at previously unknown speeds (768 Kbps).
This section is a brief introduction to the device and its functions. See the following
sections for a detailed description of the functions, the software and how to use it and
an introduction to the technical basics.
What does a router do?
A router connects local networks (LANs) and individual PCs to form a Wide Area Network
(WAN). This allows any computer in this WAN to access the computers and services on
the entire network, depending on its access privileges. The router does this by seeking
out a path over which data can be exchanged between the computers.
This is available in the form of an xDSL connection, for example, that can be realized via
normal copper telephone lines.
Connection to the Internet is a particularly widespread form of network connection. If
the local network in a company is connected with the network of an Internet service
provider, all computers in the LAN will be able to access the services and sites on the
World Wide Web.
The router is incorporated into the network in the same way as any normal PC. Any data
traveling on the network cable, therefore, is seen by the router too. It automatically
determines whether or not the data needs to be transmitted to another network. If
necessary, it establishes the connection to the destination network.

Introduction
ELSA LANCOM DSL/10 Office
2
When precisely should the router be used?
As a matter of fact, wherever computers need to be joined together and a simple modem
operation no longer fits the bill. An example is the use of the Internet in the LAN.
Many companies are experiencing an increasing demand for Internet access from all
workstations on the LAN. Online research, file transfer and e-mail are just some of the
applications intended to lighten the workload of those working at a PC.
The router links all the workstation computers on your local area network to the global
Internet. Security features such as IP masquerading not only save you money but also
shield your network against access from outside.
What does the ELSA LANCOM DSL/10 Office offer?
The following is an outline of the principal features of the device giving you a quick
overview of its capabilities.
Easy installation
K Connect the ELSA LANCOM DSL/10 Office to the power supply.
K
Establish a link to the LAN.
K
Connect to the xDSL terminal.
K
Switch it on.
K Go!
LAN connection
DSL router from ELSA can be connected to a (Fast) Ethernet network using the 10/
100Base-T port. The connection automatically determines the speed at which the local
network is running.
WAN connection
The ELSA LANCOM DSL/10 Office can be connected to the Ethernet interface of an xDSL
connection.
Status displays
LED indicators on the front of your device allow you to monitor the xDSL and Ethernet
connection, thus simplifying the process of diagnosing any systems failures.