I have 2 Balance 380s and I want to create a Layer 2 bridge between 2 buildings, however, I want to get rid of my current router/firewall and use one of the peplinks or both to route internet traffic to the WAN ports (ISP). Is this possible or do I still need a router to be a gateway.
I assume your design as below. If my assumption is correct then you need a router to route user traffics to internet.
Building A Users (192.168.1.x) —> B380 --Layer 2 SpeedFusion–> B380 —> Building B Users (192.168.1.x) —> Router/Firewall —> Internet