Issue with dynamic block

Terraform
1

Hi

I am trying to create some ingress rules in Network ACL for AWS using terraform dynamic blocks

I have so far

variable "allowed_ports"{
  description = "Allowed Ports"
   default = [443,80]
 }

resource "aws_network_acl" "myfirewall" {
  vpc_id = aws_vpc.myvpc2.id

 dynamic "ingress" {
 for_each =var.allowed_ports
  content {
    protocol   = "tcp"
    rule_no    = "${100 + count.index}"    
    action     = "allow"
    cidr_block = "0.0.0.0/0"
    from_port  = ingress.value
    to_port    = ingress.value
  } 
}

}

  1. The problem that I am running into is incrementing rule_no. How do I do that so that in each iteration of ingress rule, it gets incremented ?

  2. Also, if I have a list of cidr_block and want to allow access to port 443 to some a.b.c.d/24 network only and access to port 80 to only m.n.o.p/24 network, how do I do that using dynamic blocks ?