We have two buildings. Each has its own ISP and Firewalla Gold router.
Building A internal addresses are 192.168.1.x
Building B internal addresses are 192.168.3.x
All other internal network devices are just switches and hubs.
How can we VPN the two buildings together so the both can internally communicate with each other, keep the subnets and stop DHCP traffic between the subnets?
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