For example, if there are three VDOM in the firewall but they all will use the same routing VDOM to forward the traffic towards the outside world. Single routing VDOM will be used to route the traffic towards the internet. Routing through the VDOM: Traffic destined to the Internet will always be routed through the designated/assigned VDOM.Such kind of set-up is used where multiple ISPs have been deployed in the network topology. Each VDOM has its own physical interface link to the internet. Independent VDOMs: Some VDOMS are completely separated.However, anyone can customize and add further 10 more VDOMs in FortiGate High end firewall. By-default a FortiGate Firewall can support up to 10 VDOMs.

When VDOM is used in a firewall, a single FortiGate device becomes a virtual data centre of network security, UTM and secure network communication devices. Each VDOM has independent security policies, routing table and by-default traffic from VDOM can not move to different VDOM which means two interfaces of different VDOM can share the same IP Address without any overlapping IP/subnet problem. FortiGate VDOM or Virtual Domain split FortiGate device into multiple virtual devices.

What is a fortigate