Configure the existing ALB to use static IP addresses. Assign IP addresses in multiple Availability Zones to the ALB. Add the ALB IP addresses to the firewall appliance.

Create a Network Load Balancer (NLB). Associate the NLB with one static IP address in multiple Availability Zones. Create an ALB-type target group for the NLB and add the existing ALB. Add the NLB IP addresses to the firewall appliance. Update the clients to connect to the NLB.

Create a Network Load Balancer (NLB). Associate the NLB with one static IP address in multiple Availability Zones. Add the existing target groups to the NLB. Update the clients to connect to the NLB. Delete the ALB. Add the NLB IP addresses to the firewall appliance.

Create a Gateway Load Balancer (GWLB). Assign static IP addresses to the GWLB in multiple Availability Zones. Create an ALB-type target group for the GWLB and add the existing ALB. Add the GWLB IP addresses to the firewall appliance. Update the clients to connect to the GWLB.