| Reverse-path filtering provides protection against spoofed source addresses by causing the system to discard packets with source addresses for which the system has no route or if the route does not point towards the interface on which the packet arrived. Depending on the role of the system, reverse-path filtering may cause legitimate traffic to be discarded and, therefore, should be used with a more permissive mode or filter, or not at all. Whenever possible, reverse-path filtering should be used. Applicable, but permanent finding - The hypervisor does not support this functionality (No ndd/ipf network tuning facility). The hypervisor's network segment must not be routed, except possibly to networks where other management-related entities are found. Production virtual machine traffic must not be routed to this network. |
