Lancom Systems LCOS 3.50 Manuel d'utilisateur

Reference ManualLANCOM LCOS 3.50

LANCOM Reference Manual LCOS 3.50  Chapter 1: Preface10Preface1PrefaceUser’s manual and reference manualThe documentation of your device consists of

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections100Routing and WAN connections The callback party selects 'Call back t

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.50101Routing and WAN connectionsThe setting 'Name' offers the greate

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections102Routing and WAN connectionsTwo methods of channel bundling Static channe

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.50103Routing and WAN connections Depending on the type of application, the B1

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall104Firewall8FirewallFor most companies and many private users a work without the Internet is no

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50105Firewall Destroy data on the workstations of the LAN. Paralyse workstations of the LAN or

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall106Firewallprotocol, the search for open ports is also called “port scanning”. On the occa-sion

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50107Firewallthat a defenceless workstation installed in the Internet will - perhaps evenaccident

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall108Firewallwhich are used for creation of the rules and which are checked during theoperation o

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50109FirewallPacket filtersOne speaks about a packet filter-based Firewall, if the router only ch

 Chapter 1: Preface LANCOM Reference Manual LCOS 3.5011Prefaceucts. The extensive feature set is available throughout all LANCOM products(provided re

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall110Firewallit is expecting the connection. The server will establish as a result from its port2

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50111Firewallpackets that do not belong to one of the tracked session of the connectionstate tabl

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall112Firewalltable, because the connection to the LAN has been initiated from the client.Afterwar

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50113Firewallonly the one with the correct delivery note will pass. Likewise, a second cou-rier d

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall114FirewallApplication Gateways: It never exists a direct connection e.g. between a clientof th

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50115Firewall8.3.1 How the LANCOM Firewall inspects data packetsThe Firewall filters only those d

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall116FirewallThe Firewall only checks routed data packets!The Firewall only checks data packets r

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50117FirewallThe LANCOM Firewall uses several lists for checking data packets, which areautomatic

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall118Firewalllist will be carried out. If the action intends to accept the packet, then anentry i

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50119Firewalla dynamic one, new entries can be added continuously with the appropri-ate Firewall

LANCOM Reference Manual LCOS 3.50  Chapter 1: [email protected] online services ( www.lancom.de) are available to you around theclock

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall120FirewallHowever, if the server wants to send larger sets of data (e.g. TFTP) and wouldnot li

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50121FirewallICMP connectionsFor ICMP two cases must be differentiated: The ICMP request/reply co

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall122FirewallPlease notice that the N:N mapping functions (’N:N mapping’→page 80) are only active

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50123Firewall Route: Fragmented packets are passed on without any further checkingby the Firewal

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall124Firewallroute" are also suppressed, so that the LANCOM cannot be found, neither by"

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50125Firewallthe needed port will be opened for a short time (20 seconds) solely for theauthentic

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall126Firewall Create VPN rule: Is this Firewall rule also used to create a VPN rule?(→page 127)P

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50127Firewall either a rule applies to the packet, for which observe further rules is notactivat

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall128Firewallaction sets. If the same trigger is used for several action sets, thesequence of act

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50129Firewall The entire local network (LAN) Certain remote stations (described by the name of

 Chapter 2: System design LANCOM Reference Manual LCOS 3.5013System design2 System designThe LANCOM operating system LCOS is a collection of differen

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall130FirewallLimit / TriggerThe limit or trigger describes a quantified threshold value that must

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50131Firewall SNMP/LANmonitor: Sends a SNMP trap, that will be analyzed e. g. byLANmonitor.Each

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall132FirewallFirewall. The specific parameters for the different alerting types such as thereleva

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50133FirewallFROM: [email protected] TO: [email protected] SUBJECT: packet

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall134FirewallSNMP: Generic trap = enterpriseSpecific (6) SNMP: Specific trap = 26 (0x1A) SNMP: Ti

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50135FirewallThis contradiction shows the dilemma of the responsible administrators whohave devel

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall136FirewallSome LANCOM models support this structure by a separate LAN interface onlyused for t

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50137FirewallA direct data exchange between LAN and DMZ via LAN bridge is not possibleif a dedica

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall138FirewallIf you operate a web server in your LAN, that has been permittedaccess to this servi

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50139Firewall Example configuration “Basic Internet” If you want to permit a VPN dial-in to a L

LANCOM Reference Manual LCOS 3.50  Chapter 2: System design14System design LANCOM Wireless access points resp. LANCOM routers with wirelessmodules o

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall140Firewall For a network coupling you permit additionally the communicationbetween the involv

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50141Firewall8.3.8 Configuration of Firewall rulesFirewall wizardThe fastest method to configure

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall142FirewallLANconfigThe filters can be installed very comfortably with LANconfig. Starting from

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50143Firewall The option 'Observe further rules ...' can be used to create complexfunc

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall144Firewall Stations: Here the stations – as sender or addressee of the packets – arespecifi

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50145FirewallWEBconfig, TelnetUnder WEBconfig or Telnet the Firewall rules are configured in the

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall146Firewallaction table for Firewall actions(→page 147). It can also contain directdescriptions

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50147FirewallStations and services can be described according to the following rules in theobject

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall148Firewall Conditions If no further actions are specified in a “connect” or “Internet” fi

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50149FirewallIf an action is given without any associated limit, then implicitly apacket limit is

 Chapter 3: Configuration and management LANCOM Reference Manual LCOS 3.5015Configuration and manage-ment3 Configuration and managementThis section w

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall150Firewall Further measuresIf the "close port" action is executed, an entry in a bl

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50151Firewallsend at the same time an email to the administrator, then the description ofthe obje

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall152Firewalllast five events, that were triggered either by a Firewall rule, the DoS, or theIDS

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50153FirewallIf you call up the logging table via LANmonitor, it looks like the followingdepictio

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall154FirewallAll Firewall actions are likewise displayed within the IP router trace(’How to start

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50155FirewallOn Telnet level, the content of the filter list can be displayed with the com-mand s

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall156FirewallThe connection listThe connection table files source address, destination address,

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50157FirewallThe table contains the following elements: Element Element meaningSrc addr. Source

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall158FirewallMeaning of the flags of the connection listPort block listAddress, protocol and port

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50159FirewallSorting is done according to address, protocol and port. The table contains thefollo

LANCOM Reference Manual LCOS 3.50  Chapter 3: Configuration and management16Configuration and manage-ment3.2 Configuration softwareSituations in whic

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall160Firewall8.4 Protection against break-in attempts: Intrusion DetectionA Firewall has the task

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50161Firewall8.4.2 Configuration of the IDSLANconfigParameters of the Intrusion Detection System

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall162Firewall8.5 Protection against “Denial of Service” attacksAttacks from the Internet can be b

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50163Firewallduring the attack and, moreover, the owner of the falsified address cannotreceive no

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall164Firewalla new Denial of Service attack can result thereby if the memory of the victimis exha

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50165Firewall8.5.2 Configuration of DoS blockingLANconfigParameters against DoS attacks are set i

LANCOM Reference Manual LCOS 3.50  Chapter 8: Firewall166Firewall The connection will be cut off. The sender address will be blocked for an adjusta

 Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50167FirewallWEBconfig, TelnetWith WEBconfig or Telnet the suppression of responses can be confi

LANCOM Reference Manual LCOS 3.50  Chapter 9: Quality of Service168Quality of Service9 Quality of ServiceThis chapter dedicates itself to quality: Un

 Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50169Quality of Servicedesired data transfer, certain data packets must be treated pref

 Chapter 3: Configuration and management LANCOM Reference Manual LCOS 3.5017Configuration and manage-mentOnce LANconfig has finished its search, it d

LANCOM Reference Manual LCOS 3.50  Chapter 9: Quality of Service170Quality of Service Limited maximum bandwidthWhat is DiffServ?DiffServ stands for

 Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50171Quality of Service9.2.1 Guaranteed minimum bandwidthsHereby you give priority to e

LANCOM Reference Manual LCOS 3.50  Chapter 9: Quality of Service172Quality of Service9.2.2 Limited maximum bandwidthsHereby you limit e.g. the entire

 Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50173Quality of ServiceAs long as the interval for the minimum bandwidth is not exceede

LANCOM Reference Manual LCOS 3.50  Chapter 9: Quality of Service174Quality of Servicedata packets it is still able to receive, and thus brakes the da

 Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50175Quality of Servicestandard DSL connection, the DSL interface is thus adjusted in t

LANCOM Reference Manual LCOS 3.50  Chapter 9: Quality of Service176Quality of Service Standard reception queueAll packets that do not need special t

 Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50177Quality of ServiceA resulting delay has no disadvantageous effect to the TCP-secur

LANCOM Reference Manual LCOS 3.50  Chapter 9: Quality of Service178Quality of Serviceoffice via VPN connection, over which the Internet traffic is no

 Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50179Quality of ServiceAccordingly, a VoIP connection should be configured such that th

LANCOM Reference Manual LCOS 3.50  Chapter 3: Configuration and management18Configuration and manage-mentManagement of multiple devicesLANconfig supp

LANCOM Reference Manual LCOS 3.50  Chapter 9: Quality of Service180Quality of ServiceIn detail, delay is determined especially by the codec used, the

 Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50181Quality of Servicethe IPSec header must be added (RTP and IPSec headers can be lar

LANCOM Reference Manual LCOS 3.50  Chapter 9: Quality of Service182Quality of ServiceThe transfer time of the packets to the interface (serialization

 Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50183Quality of Servicetion always the physical data transfer via the respective interf

LANCOM Reference Manual LCOS 3.50  Chapter 9: Quality of Service184Quality of Service DiffServ: The ToS/DiffServ field is interpreted as DiffServ fi

 Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50185Quality of ServiceWEBconfig, TelnetFor configuration with WEBconfig or Telnet, the

LANCOM Reference Manual LCOS 3.50  Chapter 9: Quality of Service186Quality of Service The guaranteed bandwidth is defined on index card 'QoS&ap

 Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50187Quality of ServiceA maximum bandwidth is simply defined by a limit rule, which dis

LANCOM Reference Manual LCOS 3.50  Chapter 9: Quality of Service188Quality of Service(e.g. Voice over IP), this extra overhead is quite noticeable. E

 Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50189Quality of Service9.7.4 Sending and receiving directionLANconfigThe interpretation

 Chapter 3: Configuration and management LANCOM Reference Manual LCOS 3.5019Configuration and manage-mentSecure with HTTPSWEBconfig offers an encrypt

LANCOM Reference Manual LCOS 3.50  Chapter 9: Quality of Service190Quality of Service Not packets of certain protocols are reduced, rather than all

 Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50191Quality of ServiceThe following example shows a setting for Voice over IP telephon

LANCOM Reference Manual LCOS 3.50  Chapter 10: Virtual LANs (VLANs)192Virtual LANs (VLANs)10 Virtual LANs (VLANs)10.1 What is a Virtual LAN?The incre

 Chapter 10: Virtual LANs (VLANs) LANCOM Reference Manual LCOS 3.50193Virtual LANs (VLANs) Data traffic of certain logical units should be transmitt

LANCOM Reference Manual LCOS 3.50  Chapter 10: Virtual LANs (VLANs)194Virtual LANs (VLANs)The tagging is realized by an additional field within the M

 Chapter 10: Virtual LANs (VLANs) LANCOM Reference Manual LCOS 3.50195Virtual LANs (VLANs)rules for generating and processing of the VLAN tags are as

LANCOM Reference Manual LCOS 3.50  Chapter 10: Virtual LANs (VLANs)196Virtual LANs (VLANs)Management and user traffic on a LANSeveral hot spots are i

 Chapter 10: Virtual LANs (VLANs) LANCOM Reference Manual LCOS 3.50197Virtual LANs (VLANs)But this task is very burdensome to realize by hardware cha

LANCOM Reference Manual LCOS 3.50  Chapter 10: Virtual LANs (VLANs)198Virtual LANs (VLANs)10.3 Configuration of VLANsVLAN technology functions are pr

 Chapter 10: Virtual LANs (VLANs) LANCOM Reference Manual LCOS 3.50199Virtual LANs (VLANs)Example for a network table:10.3.2 The port tableThe port t

© 2004 LANCOM Systems GmbH, Wuerselen (Germany)While the information in this manual has been compiled with great care, it may not be deemed an assuran

LANCOM Reference Manual LCOS 3.50  Chapter 3: Configuration and management20Configuration and manage-mentThe syntax of the TFTP call is dependent on

LANCOM Reference Manual LCOS 3.50  Chapter 10: Virtual LANs (VLANs)200Virtual LANs (VLANs)10.3.3 Configuration with LANconfigParameters for virtual n

 Chapter 10: Virtual LANs (VLANs) LANCOM Reference Manual LCOS 3.50201Virtual LANs (VLANs)The definition of the used virtual networks can be accessed

LANCOM Reference Manual LCOS 3.50  Chapter 10: Virtual LANs (VLANs)202Virtual LANs (VLANs)The VLAN configuration shows up under WEBconfig as follows:

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50203Wireless LAN – WLAN11 Wireless LAN – WLAN11.1 What is a Wireless LAN?The followi

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN204Wireless LAN – WLANIEEE 802.11a: 54 MbpsIEEE 802.11a describes the operation of

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50205Wireless LAN – WLANtransmission. If exactly this range is used by another transm

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN206Wireless LAN – WLANYour LANCOM base station supports - according to the model ty

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50207Wireless LAN – WLAN Larger Wireless LANs, connection to LANs with one or more b

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN208Wireless LAN – WLAN Connecting the Wireless LAN to an existing LAN Extending t

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50209Wireless LAN – WLANIn the example above, the roaming function of the mobile stat

 Chapter 3: Configuration and management LANCOM Reference Manual LCOS 3.5021Configuration and manage-mentYou can also reserve a special calling numbe

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN210Wireless LAN – WLANalso possible to specifically control the access of workstati

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50211Wireless LAN – WLANBy the use of narrow beam antennas (e.g. AirLancer Extender),

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN212Wireless LAN – WLANbase station. Due to the client mode, it is also possible to

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50213Wireless LAN – WLANIn some applications, however, it may be desirable to divide

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN214Wireless LAN – WLANOn the way from the original WEP of the 802.11 standard to 80

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50215Wireless LAN – WLANcase, so-called assymetric encryption methods such as RSA can

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN216Wireless LAN – WLANdata packet—a double application of the XOR operation with th

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50217Wireless LAN – WLANcombination of two clear text packets. If one already knows t

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN218Wireless LAN – WLANusually weaker than 40 or 104 bits (the current IEEE standard

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50219Wireless LAN – WLANfor certain values of the RC4 key, conclusions may be drawn a

LANCOM Reference Manual LCOS 3.50  Chapter 3: Configuration and management22Configuration and manage-ment햳 Open a Telnet session to the LANCOM. Use t

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN220Wireless LAN – WLANwhich could automatically crack an arbitrary WLAN connection

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50221Wireless LAN – WLANthe possibility of installing a valid WEP key for the next se

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN222Wireless LAN – WLANThe access point is thus a sort of middle man between client

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50223Wireless LAN – WLANFurther advantages of this procedure include its simple imple

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN224Wireless LAN – WLAN A simplified procedure for deriving the Master Secret menti

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50225Wireless LAN – WLANa new component (green), however, besides the CRC, the unencr

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN226Wireless LAN – WLANdecryption part of TKIP checks this sequentiality and discard

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50227Wireless LAN – WLANThe key handshake breaks down into two phases: first the pair

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN228Wireless LAN – WLANThe client still can't be 'approved', however,

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50229Wireless LAN – WLANpoint to show whether encryption should be used or not. This

 Chapter 3: Configuration and management LANCOM Reference Manual LCOS 3.5023Configuration and manage-ment햲 Switch to the 'Security' tab in

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN230Wireless LAN – WLAN11.2.6 AES and 802.11i In mid-2004, the long awaited 802.11i

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50231Wireless LAN – WLANSimilar to TKIP, CCM uses a 48-bit Initial Vector in each pac

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN232Wireless LAN – WLANsteps like WPA, the IEEE committee has now presented the new

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50233Wireless LAN – WLANexample, is not a particularly secure SSID. (’Network setting

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN234Wireless LAN – WLANapply to all of the logical wireless networks supported by th

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50235Wireless LAN – WLANstations. If the stations do not answer these packets, then t

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN236Wireless LAN – WLANCheck that the setting 'filter out data from the listed

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50237Wireless LAN – WLANConfiguration with LANconfigFor configuration with LANconfig

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN238Wireless LAN – WLAN Redirect address when the 'Redirect' action is se

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50239Wireless LAN – WLANincorporated in the 802.11 standard for the encryption of dat

LANCOM Reference Manual LCOS 3.50  Chapter 3: Configuration and management24Configuration and manage-menttime under Windows operating systems—of all

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN240Wireless LAN – WLANKey 1/passphraseIn line with the encryption method activated,

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50241Wireless LAN – WLANRules of the entry of the keys can be found in the descriptio

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN242Wireless LAN – WLANkeys: a special key for each logical WLAN interface and three

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50243Wireless LAN – WLANRules for entering WEP keysWEP keys can be entered as ASCII c

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN244Wireless LAN – WLANConfiguration with LANconfigFor the configuration with LANcon

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50245Wireless LAN – WLANthe list of physical WLAN interfaces by clicking on the butto

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN246Wireless LAN – WLANConfiguration with WEBconfig or TelnetUnder WEBconfig or Teln

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50247Wireless LAN – WLANthis mode, the WLAN card in the access point principally work

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN248Wireless LAN – WLANpossible range and, in particular, the highest possible data

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50249Wireless LAN – WLAN Point-to-point 'Off': The access point only commu

 Chapter 3: Configuration and management LANCOM Reference Manual LCOS 3.5025Configuration and manage-mentmonitor. If the configuration of the device

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN250Wireless LAN – WLANCreate IBBSIf the station can establish an IBBS (Independent

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50251Wireless LAN – WLANLAN' tab. Open the list of logical WLAN interfaces by cl

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN252Wireless LAN – WLANConfiguration with WEBconfig or TelnetUnder WEBconfig or Teln

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50253Wireless LAN – WLANRTS thresholdThe RTS threshold prevents the occurrence of the

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN254Wireless LAN – WLAN11.4.5 Additional WLAN functionsApart from the different encr

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50255Wireless LAN – WLANIEEE 802.1x/EAPThe international industry standard IEEE 802.1

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN256Wireless LAN – WLANIPSec over WLANOnly with the LANCOM VPN Option. Not available

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50257Wireless LAN – WLANtransmitter and receiver. The areas where the waves amplify o

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN258Wireless LAN – WLANTo ensure that the Fresnel zone 1 remains unobstructed, the h

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50259Wireless LAN – WLANconnections, and even the air, and amplifying elements such a

LANCOM Reference Manual LCOS 3.50  Chapter 3: Configuration and management26Configuration and manage-mentspecify whether LANmonitor should create a l

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN260Wireless LAN – WLANThe data transmission rate is set according to the reception

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50261Wireless LAN – WLAN햸 The receiving end also has amplifying and attenuating eleme

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN262Wireless LAN – WLAN(P2mP, connection from an access point to the registered clie

 Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50263Wireless LAN – WLAN Assumed cable loss: 9 dBAirLancer Extender O-70 (802.11b/g)

LANCOM Reference Manual LCOS 3.50  Chapter 11: Wireless LAN – WLAN264Wireless LAN – WLAN11.5.4 Transmission power reductionEvery country has regulati

 Chapter 12: Office communications with LANCAPI LANCOM Reference Manual LCOS 3.50265Office communications with LANCAPI12 Office communications with L

LANCOM Reference Manual LCOS 3.50  Chapter 12: Office communications with LANCAPI266Office communications with LANCAPI Which of the computers in the

 Chapter 12: Office communications with LANCAPI LANCOM Reference Manual LCOS 3.50267Office communications with LANCAPI햴 Activate the LANCAPI server f

LANCOM Reference Manual LCOS 3.50  Chapter 12: Office communications with LANCAPI268Office communications with LANCAPI햹 Switch to the 'Availabil

 Chapter 12: Office communications with LANCAPI LANCOM Reference Manual LCOS 3.50269Office communications with LANCAPIIf necessary, the system is res

 Chapter 3: Configuration and management LANCOM Reference Manual LCOS 3.5027Configuration and manage-ment3.5.2 Overview of the keys3.5.3 Overview of

LANCOM Reference Manual LCOS 3.50  Chapter 12: Office communications with LANCAPI270Office communications with LANCAPI It is also possible to set th

 Chapter 12: Office communications with LANCAPI LANCOM Reference Manual LCOS 3.50271Office communications with LANCAPIInstallationThe CAPI Faxmodem c

LANCOM Reference Manual LCOS 3.50  Chapter 13: Server services for the LAN272Server services for the LAN13 Server services for the LANAn LANCOM offer

 Chapter 13: Server services for the LAN LANCOM Reference Manual LCOS 3.50273Server services for the LAN period of validity for the parameters assig

LANCOM Reference Manual LCOS 3.50  Chapter 13: Server services for the LAN274Server services for the LAN13.1.3 How are the addresses assigned?IP addr

 Chapter 13: Server services for the LAN LANCOM Reference Manual LCOS 3.50275Server services for the LANOtherwise, the network mask from the TCP/IP m

LANCOM Reference Manual LCOS 3.50  Chapter 13: Server services for the LAN276Server services for the LANit requested. The DHCP module provides two se

 Chapter 13: Server services for the LAN LANCOM Reference Manual LCOS 3.50277Server services for the LANChecking of IP addresses in the LANThe DHCP t

LANCOM Reference Manual LCOS 3.50  Chapter 13: Server services for the LAN278Server services for the LANpart specifies the domain. Specifying the dom

 Chapter 13: Server services for the LAN LANCOM Reference Manual LCOS 3.50279Server services for the LAN Finally, the DNS server checks whether the

LANCOM Reference Manual LCOS 3.50  Chapter 3: Configuration and management28Configuration and manage-ment3.5.4 Combination commandsAny appended param

LANCOM Reference Manual LCOS 3.50  Chapter 13: Server services for the LAN280Server services for the LAN Initially the router checks whether a DNS s

 Chapter 13: Server services for the LAN LANCOM Reference Manual LCOS 3.50281Server services for the LAN햳 Enter the domain in which the DNS server is

LANCOM Reference Manual LCOS 3.50  Chapter 13: Server services for the LAN282Server services for the LAN that are accessible via the router.With the

 Chapter 13: Server services for the LAN LANCOM Reference Manual LCOS 3.50283Server services for the LANThe DNS server may either be specified by the

LANCOM Reference Manual LCOS 3.50  Chapter 13: Server services for the LAN284Server services for the LANTo only block the access of a certain compute

 Chapter 13: Server services for the LAN LANCOM Reference Manual LCOS 3.50285Server services for the LANThe current WAN IP address of a LANCOM can be

LANCOM Reference Manual LCOS 3.50  Chapter 13: Server services for the LAN286Server services for the LANmum of 830 charge units may be used in six da

 Chapter 13: Server services for the LAN LANCOM Reference Manual LCOS 3.50287Server services for the LAN13.3.3 Settings in the charge moduleIn the ch

LANCOM Reference Manual LCOS 3.50  Chapter 13: Server services for the LAN288Server services for the LAN13.4.1 Setting up the SYSLOG module13.4.2 Exa

 Chapter 13: Server services for the LAN LANCOM Reference Manual LCOS 3.50289Server services for the LANshows the alignment between the internal sour

 Chapter 3: Configuration and management LANCOM Reference Manual LCOS 3.5029Configuration and manage-ment3.5.5 Examples3.6 Working with configuration

LANCOM Reference Manual LCOS 3.50  Chapter 13: Server services for the LAN290Server services for the LAN햶 After you have set all the parameters, conf

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50291Virtual Private Networks—VPN14 Virtual Private Networks—VPN14.1 What do

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN292Virtual Private Networks—VPN The central LAN has a connection to the I

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50293Virtual Private Networks—VPN The subsidiary also has its own connectio

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN294Virtual Private Networks—VPNRouting at the IP level with VPNIP connecti

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50295Virtual Private Networks—VPNthe Internet. With the proper technology, t

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN296Virtual Private Networks—VPNfollowing example illustrates a typical app

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50297Virtual Private Networks—VPN When VPN clients are dialing in with the

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN298Virtual Private Networks—VPN DES, key length 56 bit IKE key exchange

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50299Virtual Private Networks—VPNIn practice, LAN-LAN couplings are frequent

 Contents LANCOM Reference Manual LCOS 3.503ContentsContents1 Preface 102 System design 133 Configuration and management 153.1 Configuration tool

LANCOM Reference Manual LCOS 3.50  Chapter 3: Configuration and management30Configuration and manage-mentConvenient series configurationHowever, even

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN300Virtual Private Networks—VPNsoftware then sets up a tunnel to the VPN g

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50301Virtual Private Networks—VPNof the Internet and a private one by which

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN302Virtual Private Networks—VPN static – dynamic dynamic – dynamicDynami

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50303Virtual Private Networks—VPNStatic – dynamicIf, on the other hand, comp

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN304Virtual Private Networks—VPNtranslation via dynamic DNS services, a sol

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50305Virtual Private Networks—VPNThe LLC element is not available in 1TR6, t

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN306Virtual Private Networks—VPNaddress for the DNS name translation. This

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50307Virtual Private Networks—VPNindividual computers (RAS) or the connectio

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN308Virtual Private Networks—VPN14.5.2 Set up VPN connections with the Setu

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50309Virtual Private Networks—VPN14.5.3 Inspect VPN rulesVPN rules represent

 Chapter 3: Configuration and management LANCOM Reference Manual LCOS 3.5031Configuration and manage-ment The device no longer responds after loadin

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN310Virtual Private Networks—VPN Definition of the tunnel endpoints Defin

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50311Virtual Private Networks—VPN14.5.5 Prepare VPN network relationshipsThe

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN312Virtual Private Networks—VPN When only a portion of the local intranet

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50313Virtual Private Networks—VPNThe firewall rules for generating VPN rules

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN314Virtual Private Networks—VPN14.5.6 Configuration with LANconfigThe sect

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50315Virtual Private Networks—VPNgateway”, enter the public address of the r

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN316Virtual Private Networks—VPNaccessible in the remote and in the local L

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50317Virtual Private Networks—VPNAs a rule, it is recommended that you keep

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN318Virtual Private Networks—VPNThe only difference is that the source and

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50319Virtual Private Networks—VPN햴 Under Configuration  VPN  Connection li

LANCOM Reference Manual LCOS 3.50  Chapter 3: Configuration and management32Configuration and manage-mentLANconfig then tells you the version number

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN320Virtual Private Networks—VPNaccessible in the remote and in the local L

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50321Virtual Private Networks—VPN“VPN-GW1-REMOTE”). Enter each subnet in the

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN322Virtual Private Networks—VPNonly difference is that the source and the

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50323Virtual Private Networks—VPN14.6.1 Static/staticA VPN tunnel via the In

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN324Virtual Private Networks—VPNHeadquarters has a fixed, static address. W

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50325Virtual Private Networks—VPNAlternatively, this application can be solv

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN326Virtual Private Networks—VPNThe entries for the ISDN connection are nee

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50327Virtual Private Networks—VPN14.7.1 IPSec—The basis for LANCOM VPNThe or

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN328Virtual Private Networks—VPN14.7.2 Alternatives to IPSecIPSec is an ope

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50329Virtual Private Networks—VPNAll of these layer-2 protocols only support

 Chapter 3: Configuration and management LANCOM Reference Manual LCOS 3.5033Configuration and manage-ment StatusContains all read-only statistics of

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN330Virtual Private Networks—VPN Security Parameter Index (SPI)ID to disti

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50331Virtual Private Networks—VPNIn transport mode, the IP header of the ori

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN332Virtual Private Networks—VPNThe result is a nominal key length of 168 b

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50333Virtual Private Networks—VPNThe AH process in the senderIn the sender,

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN334Virtual Private Networks—VPNpacket. The comparison with the sent ICV of

 Chapter 14: Virtual Private Networks—VPN LANCOM Reference Manual LCOS 3.50335Virtual Private Networks—VPNGeneration of the authentication dataIn the

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN336Virtual Private Networks—VPN햵 In two further messages, the devices exch

 Chapter 15: Appendix LANCOM Reference Manual LCOS 3.5033715 Appendix: Overview of functions for LANCOM models and LCOS versions 1) Port Sep

LANCOM Reference Manual LCOS 3.42  Chapter 16: Index338Index16 IndexNumerics11 mapping 41, 843 DES 297, 3313-DES 3374-Port Switch 337802.11i 213

 Chapter 16: Index LANCOM Reference Manual LCOS 3.42339IndexCommand line reference 33Common ISDN Application Programming Interface (CAPI) 265Comput

LANCOM Reference Manual LCOS 3.50  Chapter 3: Configuration and management34Configuration and manage-ment All commands and directory/item names may

LANCOM Reference Manual LCOS 3.42  Chapter 16: Index340IndexDynamic – static 302, 323Examples 323How it works 301ICMP 324Introduction 300PPP lis

 Chapter 16: Index LANCOM Reference Manual LCOS 3.42341IndexIKE 298, 335Inband 15inbandConfiguration via Inband 15with Telnet 19Initial Vector 2

LANCOM Reference Manual LCOS 3.42  Chapter 16: Index342IndexMAC frame 194Mail server 282Main mode 297Maximum bandwidth 170, 172Microsoft Network

 Chapter 16: Index LANCOM Reference Manual LCOS 3.42343IndexPrecedence 170Pre-Shared Key 214Preshared key 298Priority control 268Private Mode 33

LANCOM Reference Manual LCOS 3.42  Chapter 16: Index344IndexTCP-Stealth-Modus 124Teardrop 164Telnet 21Temporal Key Integrity Protocol 224Term 97

 Chapter 16: Index LANCOM Reference Manual LCOS 3.42345IndexStatic – dynamic 324static - static 323VPN client 299VPN connectionsDiagnosis 322Manu

LANCOM Reference Manual LCOS 3.42  Chapter 16: Index346IndexVPN pass-through 207WEP group keys 241WLAN interfacelogical 250physical 244WLAN secur

 Chapter 3: Configuration and management LANCOM Reference Manual LCOS 3.5035Configuration and manage-ment regular firmware or configuration updates

LANCOM Reference Manual LCOS 3.50  Chapter 3: Configuration and management36Configuration and manage-mentTime-controlled rules will not necessarily b

 Chapter 4: Management LANCOM Reference Manual LCOS 3.5037Management4 Management4.1 N:N mappingNetwork Address Translation (NAT) can be used for seve

LANCOM Reference Manual LCOS 3.50  Chapter 4: Management38Managementthe defined translation range. An “inbound” address mapping, whe-reby the source

 Chapter 4: Management LANCOM Reference Manual LCOS 3.5039ManagementWith the help of N:N mapping, all addresses of the LAN can be translated toa new

LANCOM Reference Manual LCOS 3.50  Contents4Contents4.1.1 Application examples 384.1.2 Configuration 424.1.3 455 Diagnosis 465.1 LANmonitor—kno

LANCOM Reference Manual LCOS 3.50  Chapter 4: Management40ManagementIn this example, a service provider monitors the networks of different clientsout

 Chapter 4: Management LANCOM Reference Manual LCOS 3.5041ManagementThe networks of client A and B use different address ranges in therespective head

LANCOM Reference Manual LCOS 3.50  Chapter 4: Management42Managementwith actual same address range looks like two different networks for the gate-way

 Chapter 4: Management LANCOM Reference Manual LCOS 3.5043ManagementThe address range for translation must be at minimum as large as thesource addres

LANCOM Reference Manual LCOS 3.50  Chapter 4: Management44Managementped” original addresses. The entries of the remote network use the“mapped” addres

 Chapter 4: Management LANCOM Reference Manual LCOS 3.5045ManagementWEBconfig, TelnetUnder WEBconfig and Telnet you find the NAT table for configurat

LANCOM Reference Manual LCOS 3.50  Chapter 5: Diagnosis46Diagnosis5 Diagnosis5.1 LANmonitor—know what's happeningThe LANmonitor includes a monit

 Chapter 5: Diagnosis LANCOM Reference Manual LCOS 3.5047Diagnosis5.1.2 Monitor Internet connectionTo demonstrate the functions of LANmonitor we will

LANCOM Reference Manual LCOS 3.50  Chapter 5: Diagnosis48DiagnosisUnder the general information you can watch the transmission rates atwhich data is

 Chapter 5: Diagnosis LANCOM Reference Manual LCOS 3.5049Diagnosis5.2.2 Overview of the keys5.2.3 Overview of the parametersThe available traces depe

 Contents LANCOM Reference Manual LCOS 3.505Contents7.4 N:N mapping 807.4.1 Application examples 817.4.2 Configuration 857.5 Configuration of rem

LANCOM Reference Manual LCOS 3.50  Chapter 5: Diagnosis50Diagnosis5.2.4 Combination commandsAny appended parameters are processed from left to right.

 Chapter 5: Diagnosis LANCOM Reference Manual LCOS 3.5051Diagnosis5.2.5 ExamplesThis code... ... in combination with the trace causes the following:t

LANCOM Reference Manual LCOS 3.50  Chapter 6: Security52Security6 SecurityYou certainly would not like any outsider to have easy access to or to be a

 Chapter 6: Security LANCOM Reference Manual LCOS 3.5053SecurityNote: If a password has not been set, the Power LED flashes, until thedevices have be

LANCOM Reference Manual LCOS 3.50  Chapter 6: Security54Securityard Security Settings. In a terminal or Telnet session you set or change thepassword

 Chapter 6: Security LANCOM Reference Manual LCOS 3.5055Security Lock configuration for (Lock-minutes)6.1.3 Restriction of the access rights on the

LANCOM Reference Manual LCOS 3.50  Chapter 6: Security56Security햲 Change to the register card 'Security in the 'Management' configurat

 Chapter 6: Security LANCOM Reference Manual LCOS 3.5057Securityrately. The configuration access can generally be permitted or forbidden, apure rea

LANCOM Reference Manual LCOS 3.50  Chapter 6: Security58SecurityBy default, this table does not contain entries. Thus the device can beaccessed over

 Chapter 6: Security LANCOM Reference Manual LCOS 3.5059SecurityYou have a choice of the following: all: Calls are accepted from any remote station.

LANCOM Reference Manual LCOS 3.50  Contents6Contents8.3.10 Firewall limitations 1598.4 Protection against break-in attempts: Intrusion Detection 16

LANCOM Reference Manual LCOS 3.50  Chapter 6: Security60SecurityChecking the numberWhen a call is placed over an ISDN line, the caller's number

 Chapter 6: Security LANCOM Reference Manual LCOS 3.5061SecurityAn especially effective callback method is the fast-callback procedure (patentpending

LANCOM Reference Manual LCOS 3.50  Chapter 6: Security62SecurityWhen a call is placed over an ISDN line, the caller's number is normallysent ove

 Chapter 6: Security LANCOM Reference Manual LCOS 3.5063Securitywill be permitted to use the internal functions. The circle of authorizedusers can be

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections64Routing and WAN connections7 Routing and WAN connectionsThis chapter descr

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5065Routing and WAN connectionsA simplified example will clarify this process.

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections66Routing and WAN connections햵 Transmission of data packetsAs soon as the co

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5067Routing and WAN connectionsConfiguration of the routing tableAn IP routing

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections68Routing and WAN connectionsThat way routes which are forbidden on the Inte

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5069Routing and WAN connectionsHow can you assist the workstation computer now

 Contents LANCOM Reference Manual LCOS 3.507Contents10.3.4 Configuration with WEBconfig or Telnet 20111 Wireless LAN – WLAN 20311.1 What is a Wire

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections70Routing and WAN connectionsAlthough the entries in the static routing tabl

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5071Routing and WAN connectionscolumn shows which router has revealed this rou

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections72Routing and WAN connectionspackets and look on them as normal broadcast or

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5073Routing and WAN connections 'address': The network mask is deri

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections74Routing and WAN connectionsassume a certain order that differs from the pr

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5075Routing and WAN connectionsany number. It also enters this new port on the

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections76Routing and WAN connectionsWhich protocols can be transmitted using IP mas

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5077Routing and WAN connectionsOn the local side, the router supports two diff

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections78Routing and WAN connections7.3.2 Inverse masqueradingThis masking operates

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5079Routing and WAN connectionsConfiguration of the inverse masqueradingStatef

LANCOM Reference Manual LCOS 3.50  Contents8Contents13 Server services for the LAN 27213.1 Automatic IP address administration with DHCP 27213.1.1

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections80Routing and WAN connectionsExample: You are assigned the IP network addres

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5081Routing and WAN connectionsIn the first application the so-called N:1 NAT,

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections82Routing and WAN connectionsNetwork couplingAn often appearing scenario is

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5083Routing and WAN connectionsRemote monitoring and remote control of network

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections84Routing and WAN connectionsclient C operates a network with several public

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5085Routing and WAN connectionshead office. On this occasion, also all subnet

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections86Routing and WAN connectionsof the mapping address. Therefore, in an assign

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5087Routing and WAN connectionsuse the “mapped” addresses of the remote side,

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections88Routing and WAN connectionsConfiguration with different toolsLANconfigWith

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5089Routing and WAN connectionsWhen starting a new entry under WEBconfig, the

 Contents LANCOM Reference Manual LCOS 3.509Contents14.5.5 Prepare VPN network relationships 31114.5.6 Configuration with LANconfig 31414.5.7 Conf

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections90Routing and WAN connections7.5.2 Layer listWith a layer, a collection of p

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5091Routing and WAN connections7.6 Establishing connection with PPPLANCOM rout

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections92Routing and WAN connectionsof routers made by different manufacturers sinc

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5093Routing and WAN connectionsThe phases of PPP negotiationEstablishment of a

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections94Routing and WAN connectionsto begin output of the PPP protocol frames exch

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5095Routing and WAN connectionstelecomputer), the LANCOM assigns it an IP addr

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections96Routing and WAN connectionsWindows users are able to view the assigned add

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5097Routing and WAN connections7.7 Extended connection for flat rates—Keep-ali

LANCOM Reference Manual LCOS 3.50  Chapter 7: Routing and WAN connections98Routing and WAN connectionsholding time of 0 seconds then. However, connec

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.5099Routing and WAN connectionsNo callbackFor this setting, the callback entry