diff --git a/terraform/environments/dev/main.tf b/terraform/environments/dev/main.tf
new file mode 100644
index 0000000..5387a8a
--- /dev/null
+++ b/terraform/environments/dev/main.tf
@@ -0,0 +1,28 @@
+terraform {
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = "~> 6.0"
+    }
+  }
+}
+
+provider "google" {
+  project = var.project_id
+  region  = var.region
+}
+
+module "network" {
+  source = "../../modules/network"
+  
+  # Variables d'entrée
+  project_name = var.project_name
+  region      = var.region
+  
+  # Autres variables spécifiques au module
+  cidr_range  = var.cidr_range
+  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..bc97a1d
--- /dev/null
+++ b/terraform/environments/dev/variables.tf
@@ -0,0 +1,47 @@
+# - project_name (string)
+variable "project_name" {
+  description = "nom du projet"
+  type        = string
+  default     = "TP_IUT"
+}
+
+# - region (string)
+variable "region" {
+  description = "region du projet"
+  type        = string
+  default     = "europe-west1-d"
+}
+
+# - frontend_cidr (string)
+variable "frontend_cidr" {
+  description = "cidr du frontend"
+  type        = string
+  default     = "10.0.1.0/24"
+}
+
+# - backend_cidr (string)
+variable "backend_cidr" {
+  description = "cidr du backend"
+  type        = string
+  default     = "10.0.2.0/24"
+}
+
+# - database_cidr (string)
+variable "database_cidr" {
+  description = "cidr de la database"
+  type        = string
+  default     = "10.0.3.0/24"
+}
+
+# - ssh_source_ranges (string)
+variable "ssh_source_ranges" {
+  description = "acces internet"
+  type        = string
+  default     = "0.0.0.0/0"
+}
+
+variable "cidr_range" {
+  description = "cidr de network"
+  type        = string
+  default     = "10.0.0.0/16"
+}
\ 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..090c421
--- /dev/null
+++ b/terraform/modules/network/main.tf
@@ -0,0 +1,77 @@
+resource "google_compute_network" "vpc" {
+  name                    = "vpcsim"
+  auto_create_subnetworks = false
+}
+
+resource "google_compute_subnetwork" "subnet" {
+  name          = "frontend"
+  network       = google_compute_network.vpc.id
+  ip_cidr_range = var.frontend_cidr
+  region        = var.region
+}
+
+resource "google_compute_subnetwork" "subnet" {
+  name          = "backend"
+  network       = google_compute_network.vpc.id
+  ip_cidr_range = var.backend_cidr
+  region        = var.region
+}
+
+resource "google_compute_subnetwork" "subnet" {
+  name          = "database"
+  network       = google_compute_network.vpc.id
+  ip_cidr_range = var.database_cidr
+  region        = var.region
+}
+
+resource "google_compute_firewall" "allow_http-https" {
+  name    = "allow_http-https"
+  network = google_compute_network.vpc.id
+
+  allow {
+    protocol = "tcp"
+    ports    = ["80", "443"]
+  }
+
+  source_ranges = ["0.0.0.0/0"]
+  target_tags   = ["web"]
+}
+
+resource "google_compute_firewall" "allow_ssh" {
+  name    = "allow-ssh"
+  network = google_compute_network.vpc.id
+
+  allow {
+    protocol = "tcp"
+    ports    = ["22"]
+  }
+
+  source_ranges = var.ssh_source_ranges
+  target_tags   = ["ssh"]
+}
+
+resource "google_compute_firewall" "front-to-back" {
+  name    = "front-to-back"
+  network = google_compute_network.vpc.id
+
+  allow {
+    protocol = "tcp"
+    ports    = ["8000"]
+  }
+
+  source_ranges = var.frontend_cidr
+  target_tags   = ["backend"]
+}
+
+resource "google_compute_firewall" "back-to-db" {
+  name    = "back-to-db"
+  network = google_compute_network.vpc.id
+
+  allow {
+    protocol = "tcp"
+    ports    = ["3306"]
+  }
+
+  source_ranges = var.backend_cidr
+  target_tags   = ["database"]
+}
\ No newline at end of file
diff --git a/terraform/modules/network/outputs.tf b/terraform/modules/network/outputs.tf
new file mode 100644
index 0000000..e69de29
diff --git a/terraform/modules/network/variables.tf b/terraform/modules/network/variables.tf
new file mode 100644
index 0000000..e69de29