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8.1.2 The ways of the perpetrators..................................................................................................493
8.1.3 The methods..........................................................................................................................494
8.1.4 The victims.............................................................................................................................494
8.2 What is a Firewall?.................................................................................................................................494
8.2.1 Tasks of a Firewall..................................................................................................................495
8.2.2 Different types of Firewalls.....................................................................................................495
8.3 The LANCOM Firewall............................................................................................................................498
8.3.1 How the LANCOM Firewall inspects data packets..................................................................499
8.3.2 Special protocols....................................................................................................................500
8.3.3 General settings of the Firewall..............................................................................................502
8.3.4 Parameters of Firewall rules...................................................................................................504
8.3.5 Alerting functions of the Firewall...........................................................................................508
8.3.6 Strategies for Firewall settings...............................................................................................512
8.3.7 Hints for setting the Firewall..................................................................................................513
8.4 Configuring the firewall with LANconfig................................................................................................516
8.4.1 Firewall wizard.......................................................................................................................516
8.4.2 Definition of firewall objects..................................................................................................516
8.4.3 Defining firewall rules............................................................................................................519
8.5 Configuring firewall rules with WEBconfig or Telnet...............................................................................521
8.5.1 Rule table..............................................................................................................................521
8.5.2 Object table...........................................................................................................................522
8.5.3 Action table...........................................................................................................................523
8.6 Firewall diagnosis..................................................................................................................................523
8.6.1 The Firewall table...................................................................................................................523
8.6.2 The filter list...........................................................................................................................525
8.6.3 The connection list.................................................................................................................526
8.6.4 Port block list.........................................................................................................................528
8.6.5 Host block list........................................................................................................................528
8.7 Firewall limitations.................................................................................................................................529
8.8 Protection against break-in attempts: Intrusion Detection......................................................................529
8.8.1 Examples for break-in attempts..............................................................................................529
8.8.2 Configuration of the IDS........................................................................................................530
8.9 Protection against “Denial of Service” attacks........................................................................................530
8.9.1 Examples of Denial of Service Attacks....................................................................................530
8.9.2 Configuration of DoS blocking...............................................................................................532
8.9.3 Configuration of ping blocking and Stealth mode..................................................................533
8.10 Addition(s) to LCOS 7.80......................................................................................................................533
8.10.1 Increased DoS threshold value for central devices................................................................533
8.11 Addition(s) to LCOS 8.82......................................................................................................................535
8.11.1 Source tags for firewall rules................................................................................................535
9 IPv6.................................................................................................................................536
9.1 IPv6 basics.............................................................................................................................................536
9.1.1 Why use IPv6-standard IP addresses?.....................................................................................536
9.1.2 IP address structure according to the IPv6 standard...............................................................536
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Reference Manual
Contents
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