Virtual Network Topologies Distributed operation via GRE tunnels: Tunneling of address space to different Honeyd machines for load sharing. Take control of topologically dispersed address space. route entry 10.0.0.1 network 10.0.0.0/8 route 10.0.0.1 add net 10.1.0.0/16 tunnel "honeyd-a" "honeyd-b" route 10.0.0.1 add net 10.2.0.0/16 tunnel "honeyd-a" "honeyd-c" Integration of real machines into virtual topology: ARP for machines configured as external. Return traffic inserted into topology at appropriate router. Permits simple network simulation. bind 10.3.1.10 to fxp0 bind 10.2.1.11 to xl0