The following example illustrates the flow of a packet when there is a routing table update. As this is low level, there is no security involved. This example includes the following steps:
- FortiGate unit receives routing update packet
- Packet intercepted by FortiGate unit interface.
- DoS sensor checks to ensure the sender is valid and not attempting a denial of service attack.
- IP integrity header checking. If the packet is OK it continues, otherwise it is dropped.
- Stateful policy engine
Local Management traffic
- Routing module
Update routing table
The figure below illustrates the process steps.
Life of a Packet - Routing table update