Explicit proxy mode

Explicit proxy mode 

Use this information to better understand explicit proxy mode on your Gateway appliances.In explicit proxy mode, some network devices must be set up explicitly to send traffic to the device.The device then works as a proxy or relay, processing traffic on behalf of the devices.

Explicit proxy mode is best suited to networks where client devices connect to the device through a single upstream and downstream device.

Here , In this figure firewall and Gateway appliance are connect to a switch.