Lancom Systems LCOS 3.50 - Manual (Page 6)

LANCOM Reference Manual LCOS 3.50 ̈ Contents
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Contents
8.3.10 Firewall limitations 159
8.4 Protection against break-in attempts: Intrusion Detection 160
8.4.1 Examples for break-in attempts 160
8.4.2 Configuration of the IDS 161
8.5 Protection against “Denial of Service” attacks 162
8.5.1 Examples of Denial of Service attacks 162
8.5.2 Configuration of DoS blocking 165
8.5.3 Configuration of ping blocking and Stealth mode 166
9 Quality of Service 168
9.1 Why QoS? 168
9.2 Which data packets to prefer? 168
9.2.1 Guaranteed minimum bandwidths 171
9.2.2 Limited maximum bandwidths 172
9.3 The queue concept 172
9.3.1 Queues in transmission direction 172
9.3.2 Queues for receiving direction 175
9.4 Reducing the packet length 176
9.5 QoS parameters for Voice over IP applications 178
9.6 QoS in sending or receiving direction 182
9.7 QoS configuration 183
9.7.1 Evaluating ToS and DiffServ fields 183
9.7.2 Defining minimum and maximum bandwidths 185
9.7.3 Adjusting transfer rates for interfaces 187
9.7.4 Sending and receiving direction 189
9.7.5 Reducing the packet length 189
10 Virtual LANs (VLANs) 192
10.1 What is a Virtual LAN? 192
10.2 This is how a VLAN works 192
10.2.1 Frame tagging 193
10.2.2 Conversion within the LAN interconnection 194
10.2.3 Application examples 195
10.3 Configuration of VLANs 198
10.3.1 The network table 198
10.3.2 The port table 199
10.3.3 Configuration with LANconfig 200