Lancom Systems 821, 1711, 1621 manual Firewall

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

Chapter 1: Introduction

technologies such as DSL (Digital Subscriber Line). 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.

1.3Firewall

The integrated Stateful Inspection Firewall ensures an effective protection against undesired intrusion in your network by permitting only incoming data traffic as reaction to outgoing data traffic. The router’s IP masquerading func- tion hides all workstations of the LAN behind a single public IP address. The actual identities (IP addresses) of the individual workstations remain con- cealed. Firewall filters of the router permit specific IP addresses, protocols and ports to be blocked. With MAC address filters it is also possible to specifically monitor the access of workstations in the LAN to the IP routing function of the device.

 

LAN

Internet

 

Firewall

LANCOM

Further important features of the Firewall are

Intrusion Detection

Break-in attempts into the local network or on the central Firewall are rec- ognized, repelled and logged by the Intrusion Detection system (IDS) of the LANCOM DSL. Thereby it can be selected between logging within the device, email notification, SNMP trap or SYSLOG alarms.

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Contents Lancom 821 ADSL/ISDN Lancom 1621 ADSL/ISDN Lancom 1711 VPN Lancom Systems GmbH, Wuerselen Germany. All rights reserved Security settings PrefaceThank you for placing your trust in this Lancom product Model variants Preface Contents Sending faxes with Lancapi Providing dial-up accessInstallation of the MS Windows fax service Sending a fax Linking two networksSecurity checklist TroubleshootingAppendix Addresses Access to a complete local network LANIntroduction How does Adsl work?Ideal for Internet surfers All services via a single cable-thanks to the splitterCode ADSL-over-ISDN or ADSL-over-POTS?Which use does VPN offer? Conventional network infrastructure Networking via the Internet Firewall Denial-of-Service Protection Quality-of-Service / Traffic managementWhat does a router do? LAN to LAN coupling via VPN or Isdn Bridgehead to the WANAreas of deployment for routers At least one for WAN connectionsRemote access to the company network via VPN or Isdn What can your Lancom do?Conventional via Isdn WAN connection Configuration Installation Package contentsSystem preconditions Introducing Lancom Status displaysFront side Top panel Meanings of the LEDsLED remains lit green Online LED indicates the overall status of all WAN ports Flashing Power LED but no connection?Data traffic via the DSL connection Connection status of the Adsl linkConnection status of the WAN connection Data traffic via the Adsl linkSeparate status display for both Isdn B channels Status of the four LAN ports in the integrated switchBack of the unit Hardware installation Using the included power adapter Adsl connector cable transparent plugsStarting Lancom setup Software installationWhich software should you install? Basic configuration 1 TCP/IP settingsWhich 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? Configuration protectionSettings for the DSL connection Settings for the Isdn connectionConnect charge protection Instructions for LANconfigStart up LANconfig by clicking Start Programs Lancom LANconfigComplete the configuration with Finish Network without Dhcp server Instructions for WEBconfigStarting the wizards in WEBconfig Network with Dhcp serverOr with a name as discribed above Basic configuration Entering the password in the web browser Manual IP address assignment TCP/IP settings to workstation PCsIP address assignment via the Lancom default IP address assignment via a separate Dhcp serverBasic configuration Setting up Internet access Does the setup wizard know your Internet provider?Additional information for unknown Internet providers Dynamic channel bundling Isdn only User name and passwordProtocol PPPoE, Pptp or Plain Ethernet IPoE Additional connection optionsTools Setup Wizard LANconfig Quick access to the setup wizardsComplete the configuration with Apply Always configure both sides Linking two networksSecurity aspects General information What information is necessary?Isdn Settings for the TCP/IP router Settings for the IPX router DNS access to the remote LANExtranet VPN Settings for NetBIOS routing Perform the configuration on both routers, one at a time Ping quick testing for TCP/IP connections Which information is required? Providing dial-up accessCoupling Entry Isdn calling line identity CLI Settings for TCP/IPWAN Settings for IPXSettings for the dial-in computer Dial-up via VPNDial-up via Isdn Instructions for LANconfig Instructions for WEBconfig Sending faxes with Lancapi Lancom CD Installation of the Lancom Capi fax modemSelect the option Printers and Faxes from the control panel Installation of the MS Windows fax serviceSend a fax with the MS Windows fax service Sending a faxSend a fax with any given office application Sending faxes with Lancapi Security settings Security settings wizardWizard for LANconfig Firewall wizard Wizard for WEBconfigSecurity checklist Configuration under WEBconfigRules 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?Have you closed critical ports with filters? Is your saved Lancom configuration stored in a safe place?DSL data transfer is slow TroubleshootingProblems with the cabling? No WAN connection is establishedLAN statistics Cable testingUnwanted connections under Windows XP Increasing the TCP/IP window size under WindowsTroubleshooting Appendix Performance data and specificationsATM Contact assignment Adsl interfacePin RJ45 socket Ethernet WAN interface Lancom 1711 VPN ISDN-S0interfacePin RJ45 socket, corresponding to ISO 8877, EN Pin mini-DIN socket Configuration interface OutbandCE declaration of conformity Ethernet interfaces 10/100Base-TNumerics IndexConnector cable Configuration port Channel FirmSafe IPX conventions Flat rate IPX router SettingsHardware installation 1TR6 Caller ID Installation ConnectionLAN to LAN coupling 17, 18, 19, 34 Power adapter 21, 27NetBIOS Security aspects Server Setup Specify MSNSystem preconditions Connector cable WAN connection Settings Stateful Inspection TelephoneOnline Power Voltage switch WAN data VPN client WAN status Switch
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1621, 1711, 821 specifications

Lancom Systems is a notable player in the networking solutions market, and its range of routers, specifically the 821, 1621, and 1711 models, showcases the company's commitment to delivering robust, high-quality products for various enterprise needs. Each model brings distinct features, making them suitable for different environments and operational demands.

The Lancom 821 is particularly designed for small to medium-sized enterprises (SMEs) requiring reliable internet connectivity and secure networking. This router supports various VPN technologies, ensuring secure data transmission across the organization. Equipped with advanced firewall capabilities, the 821 can handle multiple connections while protecting against potential cyber threats. Its support for IPv6 enhances compatibility with future networks, making it a long-term investment. The device’s manageable architecture allows for remote access and troubleshooting, reducing the need for on-site IT interventions.

On the other hand, the Lancom 1621 is tailored for larger organizations or those with more extensive networking demands. This model offers enhanced throughput and is capable of managing large volumes of traffic without compromising performance. It features a variety of WAN connection options, including DSL, LTE, and fiber, allowing businesses to choose the best solution for their requirements. The 1621 also incorporates sophisticated Quality of Service (QoS) settings, which prioritize critical applications to ensure optimal performance during peak times. Built-in redundancy features enhance reliability, making it an excellent choice for mission-critical applications.

The Lancom 1711 takes networking capabilities a step further, targeting enterprises with even more complex needs. It boasts advanced routing and switching features, making it suitable for enterprise-grade deployments. The 1711 supports enterprise WLAN management, allowing seamless integration with wireless access points. Its robust performance over WAN connections enables the deployment of various real-time applications, such as voice over IP (VoIP) and video conferencing, without latency issues. Security is a top priority, with features including an IPSec VPN and integrated threat detection to safeguard organizational data.

In summary, the Lancom 821, 1621, and 1711 routers serve as versatile tools for businesses, each designed with distinct capabilities to meet specific networking needs. Their strengths lie in their security features, support for various connection types, and reliable performance under heavy loads. With these devices, organizations can ensure that their network infrastructure not only meets current demands but is also poised for future growth.
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