Fortigate transparent mode

What is Transparent Mode? A FortiGate unit can operate in one of two modes: Transparent or NAT/Route mode. In Transparent mode, the FortiGate is installed between the internal network and the router. In this mode, the FortiGate does not make any changes to IP addresses and only applies security scanning to traffic.

1. What is difference between NAT and transparent mode in FortiGate?
2. What is transparent mode in firewall?
3. What is the disadvantage of transparent firewall?

What is difference between NAT and transparent mode in FortiGate?

The Transparent mode is used primarily when there is a need to increase network protection but changing the configuration of the network itself is impractical. In NAT/Route mode, a FortiProxy unit is installed as a gateway or router between two networks.

What is transparent mode in firewall?

Transparent mode converts the firewall device from its default layer 3 route mode to what is essentially a layer 2 bridge. A Juniper firewall comes predefined with three layer 2 zones, which are applied to the physical interfaces.

What is the disadvantage of transparent firewall?

The main disadvantage is your are limited in the number of interfaces you can use. The restriction is 2 interfaces per firewall although you can use bridge groups to extend that number but you are still restricted to 8 interfaces per firewall or per context, as least it was 8 the last time i looked.