associateSubnets

Associates the specified subnets in the Amazon VPC to the firewall. You can specify one subnet for each of the Availability Zones that the VPC spans.

This request creates an Network Firewall firewall endpoint in each of the subnets. To enable the firewall's protections, you must also modify the VPC's route tables for each subnet's Availability Zone, to redirect the traffic that's coming into and going out of the zone through the firewall endpoint.