D-Link NetDefendOS User Manual page 6

4. Routing ......................................................................................................... 285
4.1. Overview ............................................................................................ 285
4.2. Static Routing ...................................................................................... 286
4.2.1. The Principles of Routing ............................................................ 286
4.2.2. Static Routing ........................................................................... 290
4.2.3. Route Failover ........................................................................... 296
4.2.4. Host Monitoring for Route Failover ............................................... 299
4.2.5. Advanced Settings for Route Failover ............................................ 301
4.2.6. Proxy ARP ................................................................................. 302
4.2.7. Broadcast Packet Forwarding ...................................................... 304
4.3. Policy-based Routing ............................................................................ 308
4.4. Route Load Balancing ........................................................................... 316
4.5. Virtual Routing .................................................................................... 323
4.5.1. Overview .................................................................................. 323
4.5.2. A Simple Scenario ...................................................................... 323
4.5.3. The Disadvantage of Routing Rules ............................................... 325
4.5.4. IP Rule Sets with Virtual Routing ................................................... 328
4.5.5. Multiple IP rule sets .................................................................... 329
4.5.6. Trouble Shooting ....................................................................... 329
4.6. OSPF .................................................................................................. 331
4.6.1. Dynamic Routing ....................................................................... 331
4.6.2. OSPF Concepts .......................................................................... 334
4.6.3. OSPF Components ..................................................................... 339
4.6.4. Dynamic Routing Rules ............................................................... 345
4.6.5. Setting Up OSPF ........................................................................ 348
4.6.6. An OSPF Example ...................................................................... 352
4.6.7. OSPF Troubleshooting ................................................................ 357
4.7. Multicast Routing ................................................................................. 361
4.7.1. Overview .................................................................................. 361
4.7.2. Multicast Forwarding with SAT Multiplex Rules ............................... 362
4.7.3. IGMP Configuration ................................................................... 368
4.7.4. Advanced IGMP Settings ............................................................. 374
4.7.5. Tunneling Multicast using GRE ..................................................... 376
4.8. Transparent Mode ................................................................................ 379
4.8.1. Overview .................................................................................. 379
4.8.2. Enabling Internet Access ............................................................. 384
4.8.3. A Transparent Mode Use Case ...................................................... 386
4.8.4. Spanning Tree BPDU Support ...................................................... 388
4.8.5. MPLS Pass Through .................................................................... 389
4.8.6. Advanced Settings for Transparent Mode ...................................... 390
5. DHCP Services ................................................................................................ 393
5.1. Overview ............................................................................................ 393
5.2. IPv4 DHCP Client .................................................................................. 395
5.3. IPv4 DHCP Server ................................................................................. 397
5.3.1. Static IPv4 DHCP Hosts ............................................................... 401
5.3.2. Custom IPv4 Options .................................................................. 402
5.4. IPv4 DHCP Relay .................................................................................. 404
5.5. IP Pools .............................................................................................. 408
5.6. DHCPv6 .............................................................................................. 411
5.6.1. DHCPv6 Client ........................................................................... 411
5.6.2. DHCPv6 Server .......................................................................... 414
6. Security Mechanisms ...................................................................................... 421
6.1. Access Rules ........................................................................................ 421
6.1.1. Overview .................................................................................. 421
6.1.2. IP Spoofing ............................................................................... 422
6.1.3. Access Rule Settings ................................................................... 422
6.2. ALGs .................................................................................................. 425
6.2.1. Overview .................................................................................. 425
6.2.2. The HTTP ALG ........................................................................... 427
6.2.3. The Light Weight HTTP ALG ......................................................... 432
6.2.4. The FTP ALG ............................................................................. 435
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User Manual