Architecture for Windows Server DHCP Service on AWS

The above architecture explains the deployment of Windows DHCP Server in Failover mode to serve remote sites.

Port TCP/UDP 67 and 68 have to be configured at NACL and Security Group Level to enable communication across the network with DHCP Server.

Configure DHCP Server IPs as IP helper-address at remote site L3 network device at remote sites. This will enable unicast communication over the network to send and receive DHCP traffic.