Update Traffic_Policies-Firewall_Policies-Network.tf
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@@ -2,4 +2,195 @@
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# CLOUDFLARE : Traffic Policies : Firewall Policies : Network
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# =============================================================================
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#
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#==========================================================
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# Local Variables
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#==========================================================
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locals {
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precedence = {
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# NETWORK (L4) Policies - Access Infrastructure Integration
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access_infra_target = 4000 # Access Infrastructure integration (between DNS groups)
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# NETWORK (L4) Policies - Zero Trust RDP Access Control
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rdp_admin_allow = 21000 # Allow RDP for IT admins (identity-based)
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rdp_default_deny = 21700 # Default deny RDP (after allow, before lateral movement)
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# NETWORK (L4) Policies - Lateral Movement Prevention (East-West Traffic)
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block_lateral_ssh = 22550 # Block SSH lateral movement
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block_lateral_rdp = 22600 # Block RDP lateral movement
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block_lateral_smb = 22200 # Block SMB lateral movement
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block_lateral_winrm = 22300 # Block WinRM lateral movement
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block_lateral_database = 22400 # Block database lateral movement
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# NETWORK (L4) Policies - IP Access Control
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ip_access_block = 23000 # Block direct IP access to apps (force hostname-based access)
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}
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# Common rule settings for block policies
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default_block_settings = {
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block_page_enabled = false
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ip_categories = false
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ip_indicator_feeds = false
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insecure_disable_dnssec_validation = false
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}
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# Gateway policies configuration
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# Organized by policy type: NETWORK (L4) policies first
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# Following Cloudflare best practices with 1000-spacing between major groups
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# Integrates with dashboard-managed policies at precedence: 1000-3000, 5000-20000, 36000-40000
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gateway_policies = {
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#==========================================================
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# NETWORK (L4) POLICIES
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# Port/Protocol/IP-based filtering evaluated before HTTP policies
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# Terraform precedence ranges: 4000, 21000-23000
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# Dashboard precedence ranges: 1000-3000, 36000-37000
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#==========================================================
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# Access Infrastructure Integration (Precedence: 4000)
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access_infra_target = {
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name = "NETWORK - Allow: Cible en matière d'infrastructures d'accès"
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description = "Évaluer les applications d'accès avant ou après des stratégies de passerelle spécifiques"
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enabled = true
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action = "allow"
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precedence = local.precedence.access_infra_target
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filters = ["l4"]
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traffic = "access.target"
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notification_enabled = false
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}
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# Zero Trust RDP Access Control (Precedence: 21000)
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rdp_admin_access = {
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name = "NETWORK - Allow: RDP - Accès administrateur informatique"
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description = "Autoriser l'accès RDP aux administrateurs informatiques avec vérification de l'identité et de la posture des appareils"
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enabled = true
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action = "allow"
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precedence = local.precedence.rdp_admin_allow
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filters = ["l4"]
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traffic = "net.dst.ip == ${var.gcp_windows_vm_internal_ip} and net.dst.port == ${var.cloudflare_domain_controller_rdp_port} and net.protocol == \"tcp\""
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identity = "any(identity.saml_attributes[*] == \"groups=${var.okta_itadmin_saml_group_name}\") or any(identity.saml_attributes[*] == \"groups=${var.okta_infra_admin_saml_group_name}\")"
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device_posture = "any(device_posture.checks.passed[*] == \"${var.cloudflare_macos_posture_id}\") or any(device_posture.checks.passed[*] == \"${var.cloudflare_windows_posture_id}\") or any(device_posture.checks.passed[*] == \"${var.cloudflare_linux_posture_id}\")"
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notification_enabled = false
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}
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# Lateral Movement Prevention - East-West Traffic (Precedence: 22000-22400)
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block_lateral_ssh = {
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name = "NETWORK - Block: Mouvement latéral SSH"
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description = "Bloquez les connexions SSH entre les machines virtuelles internes pour empêcher les mouvements latéraux, tout en autorisant les connexions SSH directes depuis les clients WARP."
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enabled = true
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action = "block"
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precedence = local.precedence.block_lateral_ssh
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filters = ["l4"]
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traffic = "net.dst.port == 22 and net.protocol == \"tcp\" and (net.dst.ip in {${var.aws_private_cidr} ${var.gcp_infra_cidr} ${var.gcp_windows_rdp_cidr} ${var.gcp_warp_cidr} ${var.azure_subnet_cidr}}) and (net.src.ip in {${var.aws_private_cidr} ${var.gcp_infra_cidr} ${var.gcp_windows_rdp_cidr} ${var.gcp_warp_cidr} ${var.azure_subnet_cidr}}) and not (net.src.ip in {${var.cloudflare_warp_cgnat_cidr}})"
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block_reason = "SSH lateral movement blocked - use authorized access methods or ensure device compliance"
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notification_enabled = true
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}
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block_lateral_rdp = {
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name = "NETWORK - Block: Mouvement latéral RDP"
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description = "Bloquez les connexions RDP entre les machines virtuelles internes pour empêcher les mouvements latéraux, tout en autorisant les connexions RDP directes depuis les clients WARP."
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enabled = true
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action = "block"
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precedence = local.precedence.block_lateral_rdp
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filters = ["l4"]
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traffic = "net.dst.port == 3389 and net.protocol == \"tcp\" and (net.dst.ip in {${var.aws_private_cidr} ${var.gcp_infra_cidr} ${var.gcp_warp_cidr} ${var.azure_subnet_cidr}}) and (net.src.ip in {${var.aws_private_cidr} ${var.gcp_infra_cidr} ${var.gcp_windows_rdp_cidr} ${var.gcp_warp_cidr} ${var.azure_subnet_cidr}}) and not (net.src.ip in {${var.cloudflare_warp_cgnat_cidr}})"
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block_reason = "RDP lateral movement blocked - use authorized methods"
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notification_enabled = true
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}
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block_lateral_smb = {
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name = "NETWORK - Block: Mouvement latéral SMB"
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description = "Bloquez les connexions SMB/CIFS entre les machines virtuelles internes pour empêcher les mouvements latéraux, tout en autorisant les connexions SMB directes depuis les clients WARP."
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enabled = true
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action = "block"
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precedence = local.precedence.block_lateral_smb
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filters = ["l4"]
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traffic = "net.dst.port in {445 139} and net.protocol == \"tcp\" and (net.dst.ip in {${var.aws_private_cidr} ${var.gcp_infra_cidr} ${var.gcp_windows_rdp_cidr} ${var.gcp_warp_cidr} ${var.azure_subnet_cidr}}) and (net.src.ip in {${var.aws_private_cidr} ${var.gcp_infra_cidr} ${var.gcp_windows_rdp_cidr} ${var.gcp_warp_cidr} ${var.azure_subnet_cidr}}) and not (net.src.ip in {${var.cloudflare_warp_cgnat_cidr}})"
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block_reason = "SMB lateral movement blocked - use authorized methods"
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notification_enabled = true
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}
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block_lateral_winrm = {
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name = "NETWORK - Block: Mouvement latéral WinRM"
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description = "Bloquez les connexions WinRM entre les machines virtuelles internes pour empêcher les mouvements latéraux, tout en autorisant les connexions WinRM directes depuis les clients WARP."
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enabled = true
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action = "block"
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precedence = local.precedence.block_lateral_winrm
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filters = ["l4"]
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traffic = "net.dst.port in {5985 5986} and net.protocol == \"tcp\" and (net.dst.ip in {${var.aws_private_cidr} ${var.gcp_infra_cidr} ${var.gcp_windows_rdp_cidr} ${var.gcp_warp_cidr} ${var.azure_subnet_cidr}}) and (net.src.ip in {${var.aws_private_cidr} ${var.gcp_infra_cidr} ${var.gcp_windows_rdp_cidr} ${var.gcp_warp_cidr} ${var.azure_subnet_cidr}}) and not (net.src.ip in {${var.cloudflare_warp_cgnat_cidr}})"
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block_reason = "WinRM lateral movement blocked - use authorized methods"
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notification_enabled = true
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}
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block_lateral_database = {
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name = "NETWORK - Block: Mouvement latéral dans les bases de données"
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description = "Bloquer les connexions aux bases de données entre les machines virtuelles internes afin d'empêcher les mouvements latéraux, tout en autorisant l'accès direct à la base de données depuis les clients WARP."
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enabled = true
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action = "block"
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precedence = local.precedence.block_lateral_database
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filters = ["l4"]
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traffic = "net.dst.port in {3306 5432 1433 1521 27017} and net.protocol == \"tcp\" and (net.dst.ip in {${var.aws_private_cidr} ${var.gcp_infra_cidr} ${var.gcp_windows_rdp_cidr} ${var.gcp_warp_cidr} ${var.azure_subnet_cidr}}) and (net.src.ip in {${var.aws_private_cidr} ${var.gcp_infra_cidr} ${var.gcp_windows_rdp_cidr} ${var.gcp_warp_cidr} ${var.azure_subnet_cidr}}) and not (net.src.ip in {${var.cloudflare_warp_cgnat_cidr}})"
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block_reason = "Database lateral movement blocked - use authorized methods"
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notification_enabled = true
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}
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# IP-based Access Control (Precedence: 23000)
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block_ip_access = {
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name = "NETWORK - Block : Accéder aux applications GCP via une adresse IP privée"
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description = "Cette règle bloque l'accès à l'application Compétition et à l'application Administration via l'adresse IP et le port."
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enabled = true
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action = "block"
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precedence = local.precedence.ip_access_block
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filters = ["l4"]
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traffic = "(net.dst.ip == ${var.gcp_vm_internal_ip} and net.dst.port == ${var.cloudflare_intranet_app_port}) or (net.dst.ip == ${var.gcp_vm_internal_ip} and net.dst.port == ${var.cloudflare_competition_app_port})"
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block_reason = "This website is blocked because you are trying to access an internal app via its IP address"
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notification_enabled = true
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}
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# Default Deny - Evaluated Last (Precedence: 21700)
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rdp_default_deny = {
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name = "NETWORK - Block : Deny par défaut"
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description = "Refuser l'accès RDP aux utilisateurs sans privilèges d'administrateur informatique (évalué après la politique d'autorisation)"
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enabled = true
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action = "block"
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precedence = local.precedence.rdp_default_deny
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filters = ["l4"]
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traffic = "net.dst.ip == ${var.gcp_windows_vm_internal_ip} and net.dst.port == ${var.cloudflare_domain_controller_rdp_port} and net.protocol == \"tcp\""
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block_reason = "RDP access denied - insufficient privileges"
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notification_enabled = true
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}
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}
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}
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#==========================================================
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# Gateway Policies
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#==========================================================
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resource "cloudflare_zero_trust_gateway_policy" "policies" {
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for_each = local.gateway_policies
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account_id = local.cloudflare_account_id
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name = each.value.name
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description = each.value.description
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enabled = each.value.enabled
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action = each.value.action
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precedence = each.value.precedence
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filters = each.value.filters
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traffic = each.value.traffic
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# Optional fields
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identity = try(each.value.identity, null)
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device_posture = try(each.value.device_posture, null)
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rule_settings = merge(
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local.default_block_settings,
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{
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block_reason = try(each.value.block_reason, "")
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notification_settings = {
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enabled = try(each.value.notification_enabled, false)
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msg = try(each.value.block_reason, "")
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}
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redirect = try(each.value.redirect_url, null) != null ? {
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target_uri = each.value.redirect_url
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preserve_path_and_query = false
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include_context = false
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} : null
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gen_ai_prompt_log = try(each.value.gen_ai_prompt_log, null) != null ? {
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enabled = each.value.gen_ai_prompt_log
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} : null
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}
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)
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}
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