Environment_Infrastructure/terraform/hetzner/prod/firewall.tf

resource "hcloud_firewall" "app" {
  name = "${local.name_prefix}-firewall-app"

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "22"
    source_ips  = var.admin_allowed_cidrs
    description = "SSH — admin CIDRs only"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "80"
    source_ips  = ["0.0.0.0/0", "::/0"]
    description = "HTTP public"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "443"
    source_ips  = ["0.0.0.0/0", "::/0"]
    description = "HTTPS public"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "2377"
    source_ips  = [local.app_subnet_cidr]
    description = "Docker Swarm control plane"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "7946"
    source_ips  = [local.app_subnet_cidr]
    description = "Docker Swarm node discovery (TCP)"
  }

  rule {
    direction   = "in"
    protocol    = "udp"
    port        = "7946"
    source_ips  = [local.app_subnet_cidr]
    description = "Docker Swarm node discovery (UDP)"
  }

  rule {
    direction   = "in"
    protocol    = "udp"
    port        = "4789"
    source_ips  = [local.app_subnet_cidr]
    description = "Docker Swarm VXLAN overlay"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "2377"
    source_ips  = [local.db_subnet_cidr]
    description = "Docker Swarm control plane from DB subnet"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "7946"
    source_ips  = [local.db_subnet_cidr]
    description = "Docker Swarm node discovery (TCP) from DB subnet"
  }

  rule {
    direction   = "in"
    protocol    = "udp"
    port        = "7946"
    source_ips  = [local.db_subnet_cidr]
    description = "Docker Swarm node discovery (UDP) from DB subnet"
  }

  rule {
    direction   = "in"
    protocol    = "udp"
    port        = "4789"
    source_ips  = [local.db_subnet_cidr]
    description = "Docker Swarm VXLAN overlay from DB subnet"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "8200"
    source_ips  = [local.app_subnet_cidr]
    description = "Vault API — private only, never public"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "6379"
    source_ips  = [local.app_subnet_cidr]
    description = "Redis"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "5672"
    source_ips  = [local.app_subnet_cidr]
    description = "RabbitMQ AMQP"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "61613"
    source_ips  = [local.app_subnet_cidr]
    description = "RabbitMQ STOMP"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "15674"
    source_ips  = [local.app_subnet_cidr]
    description = "RabbitMQ Web STOMP"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "15672"
    source_ips  = [local.app_subnet_cidr]
    description = "RabbitMQ Management — private, via SWAG on 443"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "9000"
    source_ips  = [local.app_subnet_cidr]
    description = "APISIX Dashboard — private, via SWAG on 443 (IP restricted)"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "9180"
    source_ips  = [local.app_subnet_cidr]
    description = "APISIX Admin API — internal only, accessed by Dashboard via Docker overlay"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "9090"
    source_ips  = [local.app_subnet_cidr]
    description = "Prometheus — private, accessed by Grafana via Docker overlay"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "3000"
    source_ips  = [local.app_subnet_cidr]
    description = "Grafana — private, via SWAG on 443 (IP restricted)"
  }

  labels = {
    environment = local.environment
    role        = "app"
  }
}

resource "hcloud_firewall" "db" {
  name = "${local.name_prefix}-firewall-db"

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "22"
    source_ips  = var.admin_allowed_cidrs
    description = "SSH — admin CIDRs only"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "5432"
    source_ips  = [local.app_subnet_cidr]
    description = "PostgreSQL from app subnet"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "5432"
    source_ips  = [local.db_subnet_cidr]
    description = "PostgreSQL replication within DB subnet"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "27017"
    source_ips  = [local.app_subnet_cidr]
    description = "MongoDB from app subnet"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "27017"
    source_ips  = [local.db_subnet_cidr]
    description = "MongoDB replica set internal traffic"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "2377"
    source_ips  = [local.app_subnet_cidr]
    description = "Docker Swarm control plane from app subnet"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "7946"
    source_ips  = [local.app_subnet_cidr]
    description = "Docker Swarm node discovery (TCP) from app subnet"
  }

  rule {
    direction   = "in"
    protocol    = "udp"
    port        = "7946"
    source_ips  = [local.app_subnet_cidr]
    description = "Docker Swarm node discovery (UDP) from app subnet"
  }

  rule {
    direction   = "in"
    protocol    = "udp"
    port        = "4789"
    source_ips  = [local.app_subnet_cidr]
    description = "Docker Swarm VXLAN overlay from app subnet"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "2379"
    source_ips  = [local.db_subnet_cidr]
    description = "etcd client port within DB subnet"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "2380"
    source_ips  = [local.db_subnet_cidr]
    description = "etcd peer port within DB subnet"
  }

  rule {
    direction   = "in"
    protocol    = "tcp"
    port        = "8008"
    source_ips  = [local.db_subnet_cidr]
    description = "Patroni REST API within DB subnet"
  }

  labels = {
    environment = local.environment
    role        = "db"
  }
}