how to apply firewall as agateway

Question

i have kali os in virtual box and connect with port 1 in the same network for portA in firewall (172.16.16.x/24 ) 
 and i have other port in firewall portB that connect with bridge 
 i need to connect kali using firewall as agateway to connect the internet ??

LuCar Toni · Answer

Hi, 
 you need to use the XG (172.16.16.16?) as the gateway in kali. 
 Afterwards create a LAN to WAN policy with MASQ on. 
 PortA should be LAN and PortB should be WAN on XG.