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Lancom Systems LCOS 3.50 User Manual

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LANCOM Reference Manual LCOS 3.50

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Contents

6

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

Pages: 1 … 4 5 6 7 8 … 346
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