diff --git a/terraform/environments/dev/main.tf b/terraform/environments/dev/main.tf
new file mode 100644
index 0000000..2134366
--- /dev/null
+++ b/terraform/environments/dev/main.tf
@@ -0,0 +1,24 @@
+terraform {
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = "~> 6.12.0"
+    }
+  }
+}
+
+provider "google" {
+  project = var.project_id
+  region  = var.region
+}
+
+module "network" {
+  source            = "../../modules/network"
+  project_name      = var.project_name
+  region           = var.region
+  frontend_cidr    = var.frontend_cidr
+  backend_cidr     = var.backend_cidr
+  database_cidr    = var.database_cidr
+  ssh_source_ranges = var.ssh_source_ranges
+
+}
\ No newline at end of file
diff --git a/terraform/environments/dev/outputs.tf b/terraform/environments/dev/outputs.tf
new file mode 100644
index 0000000..e69de29
diff --git a/terraform/environments/dev/variables.tf b/terraform/environments/dev/variables.tf
new file mode 100644
index 0000000..7f89e70
--- /dev/null
+++ b/terraform/environments/dev/variables.tf
@@ -0,0 +1,43 @@
+# Commentaire
+variable "project_name" {
+  type        = string
+  description = "but3-iac"
+  default     = "Projet-virtualisation"
+}
+
+variable "region" {
+  type        = string
+  description = "Région dans laquelle déployer les ressources"
+  default     = "europe-west9-b"
+}
+
+variable "frontend_cidr" {
+  description = "CIDR for frontend subnet"
+  type        = string
+  default     = "10.0.1.0/24"
+}
+
+variable "backend_cidr" {
+  description = "CIDR for backend subnet"
+  type        = string
+  default     = "10.0.2.0/24"
+}
+
+variable "database_cidr" {
+  description = "CIDR for database subnet"
+  type        = string
+  default     = "10.0.3.0/24"
+}
+
+variable "ssh_source_ranges" {
+  type        = string
+  description = "Plages d’adresses autorisées à se connecter en SSH"
+  default  = "0.0.0.0/0"
+
+}
+
+variable "project_id"{
+    description = "id du projet"
+    type = string
+    default = "projet-virtualisation-478713" 
+}
\ No newline at end of file
diff --git a/terraform/modules/compute/main.tf b/terraform/modules/compute/main.tf
new file mode 100644
index 0000000..e69de29
diff --git a/terraform/modules/compute/outputs.tf b/terraform/modules/compute/outputs.tf
new file mode 100644
index 0000000..e69de29
diff --git a/terraform/modules/compute/variables.tf b/terraform/modules/compute/variables.tf
new file mode 100644
index 0000000..e69de29
diff --git a/terraform/modules/iam/main.tf b/terraform/modules/iam/main.tf
new file mode 100644
index 0000000..e69de29
diff --git a/terraform/modules/iam/outputs.tf b/terraform/modules/iam/outputs.tf
new file mode 100644
index 0000000..e69de29
diff --git a/terraform/modules/iam/variables.tf b/terraform/modules/iam/variables.tf
new file mode 100644
index 0000000..e69de29
diff --git a/terraform/modules/network/main.tf b/terraform/modules/network/main.tf
new file mode 100644
index 0000000..cc8e3a8
--- /dev/null
+++ b/terraform/modules/network/main.tf
@@ -0,0 +1,86 @@
+resource "google_compute_network" "vpc" {
+  name                    = "${var.project_name}-vpc"
+  auto_create_subnetworks = false
+}
+
+# Sous-réseau
+resource "google_compute_subnetwork" "frontend" {
+  name          = "mon-frontend"
+  network       = google_compute_network.vpc.id
+  ip_cidr_range = "10.0.1.0/24"
+  region        = var.region
+}
+
+resource "google_compute_subnetwork" "backend" {
+  name          = "mon-backend"
+  network       = google_compute_network.vpc.id
+  ip_cidr_range = "10.0.2.0/24"
+  region        = var.region
+}
+
+resource "google_compute_subnetwork" "database" {
+  name          = "mon-database"
+  network       = google_compute_network.vpc.id
+  ip_cidr_range = "10.0.3.0/24"
+  region        = var.region
+}
+
+resource "google_compute_firewall" "ssh_firewall" {
+  name    = "mon_ssh"
+  network = google_compute_network.vpc.id
+
+   allow {
+    protocol = "tcp"
+    ports    = ["22"]
+  }
+
+  source_ranges = ["0.0.0.0/0"]
+  target_tags = ["ssh"]
+ 
+}
+
+resource "google_compute_firewall" "frontend_firewall" {
+  name    = "allow-http"
+  network = google_compute_network.vpc.id
+
+   allow {
+    protocol = "tcp"
+    ports    = ["80", "443"]
+  }
+
+  source_ranges = ["0.0.0.0/0"]
+  target_tags = ["frontend"]
+ 
+}
+
+resource "google_compute_firewall" "backend_firewall" {
+  name    = "allow-http"
+  network = google_compute_network.vpc.id
+
+   allow {
+    protocol = "tcp"
+    ports    = ["8000"]
+  }
+
+  source_ranges = ["frontend"]
+  target_tags = ["backend"]
+  
+}
+
+resource "google_compute_firewall" "database_firewall" {
+  name    = "allow-http"
+  network = google_compute_network.vpc.id
+
+   allow {
+    protocol = "tcp"
+    ports    = ["3306"]
+  }
+
+  source_ranges = ["backend"]
+  target_tags = ["database"]
+  
+}
+
+
+
+
diff --git a/terraform/modules/network/outputs.tf b/terraform/modules/network/outputs.tf
new file mode 100644
index 0000000..eb56fbe
--- /dev/null
+++ b/terraform/modules/network/outputs.tf
@@ -0,0 +1,16 @@
+output "vpc_terraform" {
+  description = "ID du VPC créé"
+  value = google_compute_instance.vpc.id
+
+}
+
+output "subnet_ids" {
+    description = "IDs des sous-réseaux"
+    value = {
+
+        frontend = google_compute_subnetwork.frontend.id
+        backend = google_compute_subnetwork.backend.id
+        database = google_compute_subnetwork.database.id
+    }
+  
+}
diff --git a/terraform/modules/network/variables.tf b/terraform/modules/network/variables.tf
new file mode 100644
index 0000000..0834a98
--- /dev/null
+++ b/terraform/modules/network/variables.tf
@@ -0,0 +1,36 @@
+variable "project_name" {
+  type        = string
+  description = "but3-iac"
+  
+}
+
+variable "region" {
+  type        = string
+  description = "Région dans laquelle déployer les ressources"
+  
+}
+
+variable "frontend_cidr" {
+  description = "CIDR for frontend subnet"
+  type        = string
+  
+}
+
+variable "backend_cidr" {
+  description = "CIDR for backend subnet"
+  type        = string
+  
+}
+
+variable "database_cidr" {
+  description = "CIDR for database subnet"
+  type        = string
+  
+}
+
+variable "ssh_source_ranges" {
+  type        = string
+  description = "Plages d’adresses autorisées à se connecter en SSH"
+  
+
+}