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Lancom Systems manual LANCOM 821 ADSL, LANCOM 1621 ADSL, LANCOM 1711 DSL, WAN connection

Models: 1621 1711 821

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WAN connection

LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN

Chapter 1: Introduction

LANCOM 821 ADSL	LANCOM 1621 ADSL	LANCOM 1711 DSL

LAN to LAN coupling via ISDN

RAS server (via VPN)

RAS server (via ISDN)

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)

N:N mapping for coupling networks using the same IP address ranges

from LCOS 5.0

LANCAPI server for the operating with office applications as fax or answer- ing machine via ISDN interface

WAN connection

Connection for DSL or cable modem

Integrated ADSL modem

ISDN S0 bus in multi device-mode or in point-to-point mode with automatic

D-channel protocol identification. Supports static and dynamic channel bundling per MLPPP and BACP as well as Stac data compression (Hi/fn)

Port for external modem, analogue or GSM (requires LANCOM modem adapter kit; from LCOS 5.0)

LAN connection

Integrated 4-port auto-mode-switch (10/100 Mbps) with private mode for

4 individual Fast Ethernet LAN ports, switchable separately, e.g. as LAN switch or separate DMZ ports, auto crossover.

Security functions

IPSec encryption in external software (VPN client)

IPSec encryption in internal software

IPSec encryption in hardware (optional, activation via the VPN-25-Option)

IP masquerading (NAT, PAT) to hide all workstations of the LAN behind one common public IP address.

Stateful Inspection Firewall

EN

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Lancom Systems LANCOM 821 ADSL, LANCOM 1621 ADSL, LANCOM 1711 DSL, WAN connection, LAN connection, Security functions

Contents

LANCOM 821 ADSL/ISDN - LANCOM 1621 ADSL/ISDN - LANCOM 1711 VPN 2005 LANCOM Systems GmbH, Wuerselen Germany. All rights reserved User manual and reference manual Security settingsPreface Thank you for placing your trust in this LANCOM productThis documentation was compiled … Model variantsinfo@lancom.de Important instruction that should be followed Notes symbolsAdditional instructions which can be helpful, but are not required Setting up Internet access ContentsInstallation Basic configurationSecurity settings Providing dial-up accessLinking two networks Sending faxes with LANCAPIAppendix Troubleshootingwould be possible when relying solely on the telephone network IntroductionHow does ADSL work? High speed via standard telephone linesADSL provider All services via a single cable-thanks to the splitterIdeal for Internet surfers InternetCode ADSL-over-ISDN or ADSL-over-POTS?1.2 Which use does VPN offer? Conventional network infrastructure Networking via the Internet Further important features of the Firewall are Intrusion Detection 1.3 FirewallInternet Denial-of-Service Protection 1.4 What does a router do?Quality-of-Service / Traffic management 1.4.2 Areas of deployment for routers 1.4.1 Bridgehead to the WANLANCOM 1711 DSL 1.5 What can your LANCOM do?LANCOM 821 ADSL LANCOM 1621 ADSLWAN connection LANCOM 821 ADSLLANCOM 1621 ADSL LANCOM 1711 DSLLANCOM 1711 DSL ConfigurationLANCOM 821 ADSL LANCOM 1621 ADSL2.1 Package contents 2 Installation2.2 System preconditions 2.3.1 Status displays 2.3 Introducing LANCOMFront side Meanings of the LEDs Top panelLANCOM Flashing Power LED but no connection?Completely deactivate the lock that has been triggered set limit to The Online LED indicates the overall status of all WAN portsData traffic via the DSL connection Connection status of the ADSL linkConnection status of the WAN connection Data traffic via the ADSL linkStatus of ISDN S0 connection Status of the four LAN ports in the integrated switchSeparate status display for both ISDN B channels ISDN/S0 port ADSL port 2.3.2 The back of the unitVoltage switch Connection for the included power adapter Reset switch Switch with four 10/100Base-Tx connections Serial configuration port2.4 Hardware installation DSL - connect the WAN interface ADSL connector cable transparent plugsusing the included power adapter Connect to power - Connect socket2.5.1 Starting LANCOM setup 2.5 Software installation2.5.2 Which software should you install? 3.1.1 TCP/IP settings 3 Basic configuration3.1 Which information is necessary? IP address and netmask for the LANCOM New LAN-fully automatic configuration possibleConfigure manually nevertheless? Information required for manual TCP/IP configurationEnable DHCP server? 3.1.2 Configuration protection3.1.3 Settings for the DSL connection 3.1.4 Settings for the ISDN connectionLANconfig 3.2 Instructions for LANconfig3.1.5 Connect charge protection Complete the configuration with Finish Network without DHCP server 3.3 Instructions for WEBconfigNetwork with DHCP server Starting the wizards in WEBconfigIf you cannot access an unconfigured LANCOM, the problem may be due to the netmask of the LAN with less than 254 possible hosts net- mask 255.255.255.0, please ensure that the IP address x.x.x.254 is located in your own subnet Entering the password in the web browser Manual IP address assignment 3.4 TCP/IP settings to workstation PCsIP address assignment via the LANCOM default IP address assignment via a separate DHCP serverPage ADSL 4 Setting up Internet accessDoes the setup wizard know your Internet provider? Additional information for unknown Internet providersDynamic channel bundling ISDN only Additional connection optionsUser name and password Protocol PPPoE, PPTP or Plain Ethernet IPoELANconfig Quick access to the setup wizards 4.1 Instructions for LANconfig4.2 Instructions for WEBconfig Tools Setup Wizard5 Linking two networks Always configure both sidesSecurity aspects 5.1.1 General information 5.1 What information is necessary?TCP/IP routing for access to remote network IPX routing for access to remote networkNetBIOS routing for access to remote net Hide local stations for access to remote netNetmask 5.1.2 Settings for the TCP/IP routerDNS access to the remote LAN 5.1.3 Settings for the IPX routerExtranet VPN 5.1.4 Settings for NetBIOS routing 5.3 Instructions for WEBconfig 5.2 Instructions for LANconfigPing - quick testing for TCP/IP connections 6.1 Which information is required? 6 Providing dial-up accessSecurity aspects Entry 6.1.1 General informationNotes to the individual values CouplingThe ISDN calling line identity CLI 6.1.2 Settings for TCP/IP6.1.4 Settings for NetBIOS routing 6.1.3 Settings for IPXUser SAMPLE 6.2.1 Dial-up via VPN 6.2 Settings for the dial-in computer6.2.2 Dial-up via ISDN 6.3 Instructions for LANconfig 6.4 Instructions for WEBconfig ISDN 7 Sending faxes with LANCAPISelect the entry Install LANCOM software in the setup program of your 7.1 Installation of the LANCOM CAPI fax modemLANCOM CD Select the option Printers and Faxes from the control panel 7.2 Installation of the MS Windows fax service7.3 Sending a fax 7.3.2 Send a fax with the MS Windows fax service7.3.1 Send a fax with any given office application LANCOM 821 ADSL/ISDN - LANCOM 1621 ADSL/ISDN - LANCOM 1711 VPN 8.1 The security settings wizard 8 Security settings8.1.1 Wizard for LANconfig 8.2.1 Wizard for LANconfig 8.1.2 Wizard for WEBconfig8.2 The firewall wizard 8.2.2 Configuration under WEBconfig 8.3 The security checklistRules Do you make use of a ’Deny All’ Firewall strategy? Have you assigned a password for the configuration?Have you permitted remote configuration? Have you activated the Firewall?Is your saved LANCOM configuration stored in a safe place? Have you excluded certain stations from access to the router?Have you closed critical ports with filters? 9.2 DSL data transfer is slow 9 TroubleshootingProblems with the cabling? 9.1 No WAN connection is establishedLAN statistics 9.4 Cable testing9.3 Unwanted connections under Windows XP Increasing the TCP/IP window size under WindowsChange then to menu item Expert configuration Status LAN statis LANCOM 10.1 Performance data and specifications10 Appendix LANCOMLANCOM Temperature rangeLANCOM LANCOMLANCOM 10.2 Contact assignment10.2.1 ADSL interface ConnectorConnector 10.2.2 Ethernet WAN interface LANCOM 1711 VPN10.2.3 ISDN-S0 interface ConnectorConnector 10.2.5 Configuration interface Outband10.3 CE declaration of conformity 10.2.4 Ethernet interfaces 10/100Base-TNumerics IndexISDN leased line option 15, 17see status displays Setting up access to the InternetWide Area Network WAN Stateful Inspection Firewall