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nacl-secure.tf
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nacl-secure.tf
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locals {
secure_subnet_ip = split("/", element(aws_subnet.secure.*.cidr_block, length(aws_subnet.secure.*.cidr_block) - 1))[0]
secure_subnet_summary = var.vpc_cidr_summ != "/0" ? "${cidrhost("${local.secure_subnet_ip}${var.vpc_cidr_summ}", 0)}${var.vpc_cidr_summ}" : aws_vpc.default.cidr_block
}
resource "aws_network_acl" "secure" {
vpc_id = aws_vpc.default.id
subnet_ids = aws_subnet.secure.*.id
tags = merge(
var.tags,
{
"Name" = format(local.names[var.name_pattern].nacl_secure, var.name, local.name_suffix)
"Scheme" = "secure"
"EnvName" = var.name
}
)
}
resource "aws_network_acl_rule" "in_secure_from_secure" {
count = var.vpc_cidr_summ != "/0" ? 1 : length(aws_subnet.secure.*.cidr_block)
network_acl_id = aws_network_acl.secure.id
rule_number = count.index + 101
egress = false
protocol = -1
rule_action = "allow"
cidr_block = var.vpc_cidr_summ != "/0" ? local.secure_subnet_summary : aws_subnet.secure[count.index].cidr_block
}
resource "aws_network_acl_rule" "out_secure_to_secure" {
count = var.vpc_cidr_summ != "/0" ? 1 : length(aws_subnet.secure.*.cidr_block)
network_acl_id = aws_network_acl.secure.id
rule_number = count.index + 1
egress = true
protocol = -1
rule_action = "allow"
cidr_block = var.vpc_cidr_summ != "/0" ? local.secure_subnet_summary : aws_subnet.secure[count.index].cidr_block
}
resource "aws_network_acl_rule" "in_secure_from_private" {
count = var.vpc_cidr_summ != "/0" ? 1 : length(aws_subnet.private.*.cidr_block)
network_acl_id = aws_network_acl.secure.id
rule_number = count.index + 201
egress = false
protocol = -1
rule_action = "allow"
cidr_block = var.vpc_cidr_summ != "/0" ? local.private_subnet_summary : aws_subnet.private[count.index].cidr_block
}
resource "aws_network_acl_rule" "out_secure_to_private" {
count = var.vpc_cidr_summ != "/0" ? 1 : length(aws_subnet.private.*.cidr_block)
network_acl_id = aws_network_acl.secure.id
rule_number = count.index + 101
egress = true
protocol = -1
rule_action = "allow"
cidr_block = var.vpc_cidr_summ != "/0" ? local.private_subnet_summary : aws_subnet.private[count.index].cidr_block
}
resource "aws_network_acl_rule" "in_secure_from_transit" {
count = var.transit_subnet ? var.vpc_cidr_summ != "/0" ? 1 : length(aws_subnet.transit.*.cidr_block) : 0
network_acl_id = aws_network_acl.secure.id
rule_number = count.index + 301
egress = false
protocol = -1
rule_action = "allow"
cidr_block = var.vpc_cidr_summ != "/0" ? local.transit_subnet_summary : aws_subnet.transit[count.index].cidr_block
}
resource "aws_network_acl_rule" "out_secure_to_transit" {
count = var.transit_subnet ? var.vpc_cidr_summ != "/0" ? 1 : length(aws_subnet.transit.*.cidr_block) : 0
network_acl_id = aws_network_acl.secure.id
rule_number = count.index + 201
egress = true
protocol = -1
rule_action = "allow"
cidr_block = var.vpc_cidr_summ != "/0" ? local.transit_subnet_summary : aws_subnet.transit[count.index].cidr_block
}
#############
# S3 Endpoint
#############
resource "aws_network_acl_rule" "in_secure_from_s3" {
count = var.vpc_endpoint_s3_gateway ? length(data.aws_ec2_managed_prefix_list.s3.entries) : 0
network_acl_id = aws_network_acl.secure.id
rule_number = count.index + 501
egress = false
protocol = -1
rule_action = "allow"
cidr_block = tolist(data.aws_ec2_managed_prefix_list.s3.entries)[count.index].cidr
from_port = 0
to_port = 0
}
resource "aws_network_acl_rule" "out_secure_to_s3" {
count = var.vpc_endpoint_s3_gateway ? length(data.aws_ec2_managed_prefix_list.s3.entries) : 0
network_acl_id = aws_network_acl.secure.id
rule_number = count.index + 501
egress = true
protocol = -1
rule_action = "allow"
cidr_block = tolist(data.aws_ec2_managed_prefix_list.s3.entries)[count.index].cidr
from_port = 0
to_port = 0
}
#############
# Dynamodb Endpoint
#############
resource "aws_network_acl_rule" "in_secure_from_dynamodb" {
count = var.vpc_endpoint_dynamodb_gateway ? length(data.aws_ec2_managed_prefix_list.dynamodb.entries) : 0
network_acl_id = aws_network_acl.secure.id
rule_number = count.index + 601
egress = false
protocol = -1
rule_action = "allow"
cidr_block = tolist(data.aws_ec2_managed_prefix_list.dynamodb.entries)[count.index].cidr
from_port = 0
to_port = 0
}
resource "aws_network_acl_rule" "out_secure_to_dynamodb" {
count = var.vpc_endpoint_dynamodb_gateway ? length(data.aws_ec2_managed_prefix_list.dynamodb.entries) : 0
network_acl_id = aws_network_acl.secure.id
rule_number = count.index + 601
egress = true
protocol = -1
rule_action = "allow"
cidr_block = tolist(data.aws_ec2_managed_prefix_list.dynamodb.entries)[count.index].cidr
from_port = 0
to_port = 0
}