This module makes it easy to setup Cloud Armor Global Backend Security Policy with Security rules. You can attach the global Security policy to the backend services exposed by the following load balancer types:
- Global external Application Load Balancer (HTTP/HTTPS)
- Classic Application Load Balancer (HTTP/HTTPS)
- Global external proxy Network Load Balancer (TCP/SSL)
- Classic proxy Network Load Balancer (TCP/SSL)
There are five type of rules you can create in each policy:
- Pre-Configured Rules: These are based on pre-configured waf rules.
- Security Rules: Allow or Deny traffic from list of IP addresses or IP address ranges.
- Custom Rules: You can create your own rules using Common Expression Language (CEL).
- Threat Intelligence Rules: Add Rules based on threat intelligence. Managed protection plus subscription is needed to use this feature.
- Automatically deploy Adaptive Protection Suggested Rules; When enable module will create a rule for automatically deploying the suggested rules that Adaptive Protection generates.
NOTE: For external passthrough Network Load Balancers, protocol forwarding and VMs with public IP addresses create network Edge Security policy using advanced network DDoS protection and network edge security policy sub-modules.
NOTE: For Regional external Application Load Balancer and Regional internal Application Load Balancer create Regionl Backend Security policy using regional backend serity policy sub-module.
This module is meant for use with Terraform 1.3+ and tested using Terraform 1.3+. If you find incompatibilities using Terraform >=1.3, please open an issue.
Current version is 2.X. Upgrade guides:
module security_policy {
source = "GoogleCloudPlatform/cloud-armor/google"
project_id = "my-project-id"
name = "my-test-ca-policy"
description = "Test Cloud Armor security policy with preconfigured rules, security rules and custom rules"
default_rule_action = "deny(403)"
type = "CLOUD_ARMOR"
layer_7_ddos_defense_enable = true
layer_7_ddos_defense_rule_visibility = "STANDARD"
recaptcha_redirect_site_key = google_recaptcha_enterprise_key.primary.name
json_parsing = "STANDARD"
log_level = "VERBOSE"
pre_configured_rules = {}
security_rules = {}
custom_rules = {}
threat_intelligence_rules = {}
adaptive_protection_auto_deploy = {}
}
Rule details and Sample Code for each type of rule is available here
There are examples included in the examples folder but simple usage is as follows:
module "security_policy" {
source = "GoogleCloudPlatform/cloud-armor/google"
version = "~> 4.0"
project_id = var.project_id
name = "my-test-security-policy"
description = "Test Security Policy"
recaptcha_redirect_site_key = google_recaptcha_enterprise_key.primary.name
default_rule_action = "allow"
type = "CLOUD_ARMOR"
layer_7_ddos_defense_enable = true
layer_7_ddos_defense_rule_visibility = "STANDARD"
# Pre-configured WAF Rules
pre_configured_rules = {
"sqli_sensitivity_level_4" = {
action = "deny(502)"
priority = 1
target_rule_set = "sqli-v33-stable"
sensitivity_level = 4
description = "sqli-v33-stable Sensitivity Level 4 and 2 preconfigured_waf_config_exclusions"
}
"xss-stable_level_2_with_exclude" = {
action = "deny(502)"
priority = 2
description = "XSS Sensitivity Level 2 with excluded rules"
preview = true
target_rule_set = "xss-v33-stable"
sensitivity_level = 2
exclude_target_rule_ids = ["owasp-crs-v030301-id941380-xss", "owasp-crs-v030301-id941280-xss"]
}
"php-stable_level_0_with_include" = {
action = "deny(502)"
priority = 3
description = "PHP Sensitivity Level 0 with included rules"
target_rule_set = "php-v33-stable"
include_target_rule_ids = ["owasp-crs-v030301-id933190-php", "owasp-crs-v030301-id933111-php"]
}
}
# Action against specific IP addresses or IP adress ranges
security_rules = {
"deny_project_bad_actor1" = {
action = "deny(502)"
priority = 11
description = "Deny Malicious IP address from project bad_actor1"
src_ip_ranges = ["190.217.68.211/32", "45.116.227.68/32", "103.43.141.122", "123.11.215.36", "123.11.215.37", ]
preview = true
}
"rate_ban_project_actor3" = {
action = "rate_based_ban"
priority = 14
description = "Rate based ban for address from project actor3 only if they cross banned threshold"
src_ip_ranges = ["190.217.68.213", "45.116.227.70", ]
rate_limit_options = {
exceed_action = "deny(502)"
rate_limit_http_request_count = 10
rate_limit_http_request_interval_sec = 60
ban_duration_sec = 600
ban_http_request_count = 1000
ban_http_request_interval_sec = 300
enforce_on_key = "ALL"
}
}
}
# Custom Rules using CEL
custom_rules = {
deny_specific_regions = {
action = "deny(502)"
priority = 21
description = "Deny specific Regions"
expression = <<-EOT
'[AU,BE]'.contains(origin.region_code)
EOT
}
deny_specific_ip = {
action = "deny(502)"
priority = 22
description = "Deny specific IP address in US Region"
expression = <<-EOT
origin.region_code == "US" && inIpRange(origin.ip, '47.185.201.159/32')
EOT
}
allow_path_token_header = {
action = "allow"
priority = 25
description = "Allow path and token match with addition of header"
expression = <<-EOT
request.path.matches('/login.html') && token.recaptcha_session.score < 0.2
EOT
header_action = [
{
header_name = "reCAPTCHA-Warning"
header_value = "high"
},
{
header_name = "X-Resource"
header_value = "test"
}
]
}
}
# Threat Intelligence Rules
threat_intelligence_rules = {
deny_malicious_ips = {
action = "deny(502)"
priority = 200
description = "Deny IP addresses known to attack web applications"
preview = false
feed = "iplist-known-malicious-ips"
exclude_ip = "['47.100.100.100', '47.189.12.139']"
}
}
}
resource "google_compute_backend_service" "backend_service" {
provider = google-beta
## Attach Cloud Armor policy to the backend service
security_policy = module.cloud_armor.policy.self_link
project = var.project_id
name = "glb-ca-web-backend-svc-a"
port_name = "http"
protocol = "HTTP"
timeout_sec = 10
backend {
group = google_compute_instance_group.ca_vm_1_ig.self_link
max_utilization = 0.5
}
health_checks = [google_compute_http_health_check.default.id]
load_balancing_scheme = "EXTERNAL"
}
| Name | Description | Type | Default | Required |
|---|---|---|---|---|
| adaptive_protection_auto_deploy | Configuration for Automatically deploy Cloud Armor Adaptive Protection suggested rules. priority and action fields are required if enable is set to true. Requires layer_7_ddos_defense_enable set to true. |
object({ |
{ |
no |
| custom_rules | Custome security rules | map(object({ |
{} |
no |
| default_rule_action | default rule that allows/denies all traffic with the lowest priority (2,147,483,647). | string |
"allow" |
no |
| description | An optional description of this security policy. Max size is 2048. | string |
null |
no |
| json_custom_config_content_types | A list of custom Content-Type header values to apply the JSON parsing. Only applicable when json_parsing is set to STANDARD. Not supported for CLOUD_ARMOR_EDGE policy type. | list(string) |
[] |
no |
| json_parsing | Whether or not to JSON parse the payload body. Possible values are DISABLED and STANDARD. Not supported for CLOUD_ARMOR_EDGE policy type. | string |
"DISABLED" |
no |
| layer_7_ddos_defense_enable | (Optional) If set to true, enables Cloud Armor Adaptive Protection for L7 DDoS detection. Cloud Armor Adaptive Protection is only supported in Global Security Policies of type CLOUD_ARMOR. Set this variable true for Adaptive Protection Auto Deploy. |
bool |
false |
no |
| layer_7_ddos_defense_rule_visibility | (Optional) Rule visibility can be one of the following: STANDARD - opaque rules. PREMIUM - transparent rules. This field is only supported in Global Security Policies of type CLOUD_ARMOR. | string |
"STANDARD" |
no |
| log_level | Log level to use. Possible values are NORMAL and VERBOSE. Not supported for CLOUD_ARMOR_EDGE policy type. | string |
"NORMAL" |
no |
| name | Name of the security policy. | string |
n/a | yes |
| pre_configured_rules | Map of pre-configured rules with Sensitivity levels. | map(object({ |
{} |
no |
| project_id | The project in which the resource belongs. | string |
n/a | yes |
| recaptcha_redirect_site_key | reCAPTCHA site key to be used for all the rules using the redirect action with the redirect type of GOOGLE_RECAPTCHA. | string |
null |
no |
| security_rules | Map of Security rules with list of IP addresses to block or unblock. | map(object({ |
{} |
no |
| threat_intelligence_rules | Map of Threat Intelligence Feed rules | map(object({ |
{} |
no |
| type | Type indicates the intended use of the security policy. Possible values are CLOUD_ARMOR and CLOUD_ARMOR_EDGE. | string |
"CLOUD_ARMOR" |
no |
| user_ip_request_headers | An optional list of case-insensitive request header names to use for resolving the callers client IP address. | list(string) |
[] |
no |
| Name | Description |
|---|---|
| policy | Security policy created |
Pre-Configured Rules, Security Rules, Custom Rules and Threat Intelligence Rules are maps of rules. Each rule is a map which provides details about the rule. Here is an example of pre_configured_rules:
"my_rule" = {
action = "deny(502)"
priority = 1
description = "SQL Sensitivity Level 4"
preview = false
redirect_type = null
redirect_target = null
target_rule_set = "sqli-v33-stable"
sensitivity_level = 4
include_target_rule_ids = []
exclude_target_rule_ids = []
header_action = []
rate_limit_options = {}
preconfigured_waf_config_exclusions = {}
}
action, priority, description, preview, rate_limit_options, header_action, redirect_type and redirect_target are common in all the rule types. Some of then are optional and some have default value see Input.
rate_limit_options is needed for the rules where action is set to throttle or rate_based_ban. rate_limit_options is a map of strings with following key pairs. You can find more details about rate limit here.
rate_limit_options = {
exceed_action = "deny(502)"
rate_limit_http_request_count = 10
rate_limit_http_request_interval_sec = 60 # must be one of 60, 120, 180, 240, 300, 600, 900, 1200, 1800, 2700, 3600 seconds
ban_duration_sec = 600 # needed only if action is rate_based_ban
ban_http_request_count = 1000 # needed only if action is rate_based_ban
ban_http_request_interval_sec = 300 # must be one of 60, 120, 180, 240, 300, 600, 900, 1200, 1800, 2700, 3600 seconds. needed only if action is rate_based_ban
enforce_on_key = "ALL" # All is default value. If null is passed terraform will use ALL as the value. Will be set to "" when `enforce_on_key_configs` is not null
enforce_on_key_configs = [
{
enforce_on_key_type = "HTTP_PATH"
},
{
enforce_on_key_type = "HTTP_COOKIE"
enforce_on_key_name = "site_id"
}
]
}
preconfigured_waf_config_exclusions is needed for custom application that might contain content in request fields (like headers, cookies, query parameters, or URIs) that matches signatures in preconfigured WAF rules, but which you know is legitimate. In this case, you can reduce false positives by excluding those request fields from inspection by associating a list of exclusions for request fields with the security policy rule. You can pass request_header, request_uri, request_cookie and request_query_param. It is available in Pre-Configured Rules. You can find more details about preconfigured_waf_config here
preconfigured_waf_config_exclusions = {
exclusion_1 = {
target_rule_set = "sqli-v33-stable"
target_rule_ids = ["owasp-crs-v030301-id942120-sqli", "owasp-crs-v030301-id942130-sqli"]
request_cookie = [
{
operator = "STARTS_WITH"
value = "abc"
}
]
request_header = [
{
operator = "STARTS_WITH"
value = "xyz"
},
{
operator = "STARTS_WITH"
value = "uvw"
}
]
}
exclusion_2 = {
target_rule_set = "sqli-v33-stable"
target_rule_ids = ["owasp-crs-v030301-id942150-sqli", "owasp-crs-v030301-id942180-sqli"]
request_header = [
{
operator = "STARTS_WITH"
value = "lmn"
},
{
operator = "ENDS_WITH"
value = "opq"
}
]
request_uri = [
{
operator = "CONTAINS"
value = "https://hashicorp.com"
},
{
operator = "CONTAINS"
value = "https://xyz.com"
},
]
}
}
List of preconfigured rules are available here. Following is the key value pairs for setting up pre configured rules. include_target_rule_ids and exclude_target_rule_ids are mutually exclusive. If include_target_rule_ids is provided, sensitivity_level is automatically set to 0 by the module as it is a requirement for opt in rule signature. exclude_target_rule_ids is ignored when include_target_rule_ids is provided.
"sqli_sensitivity_level_4" = {
action = "deny(502)"
priority = 1
description = "SQL Sensitivity Level 4"
preview = false
redirect_type = null
redirect_target = null
target_rule_set = "sqli-v33-stable"
sensitivity_level = 4
include_target_rule_ids = []
exclude_target_rule_ids = []
rate_limit_options = {}
header_action = []
preconfigured_waf_config_exclusions = {}
}
pre_configured_rules = {
"php-stable_level_1_with_include" = {
action = "deny(502)"
priority = 3
description = "PHP Sensitivity Level 1 with included rules"
target_rule_set = "xss-v33-stable"
sensitivity_level = 0
include_target_rule_ids = ["owasp-crs-v030301-id933190-php", "owasp-crs-v030301-id933111-php"]
}
"sqli_sensitivity_level_4" = {
action = "deny(502)"
priority = 1
target_rule_set = "sqli-v33-stable"
sensitivity_level = 4
preconfigured_waf_config_exclusions = {
exclusion_1 = {
target_rule_set = "sqli-v33-stable"
target_rule_ids = ["owasp-crs-v030301-id942120-sqli", "owasp-crs-v030301-id942130-sqli"]
request_cookie = [
{
operator = "STARTS_WITH"
value = "abc"
}
]
request_header = [
{
operator = "STARTS_WITH"
value = "xyz"
},
{
operator = "STARTS_WITH"
value = "uvw"
}
]
}
exclusion_2 = {
target_rule_set = "sqli-v33-stable"
target_rule_ids = ["owasp-crs-v030301-id942150-sqli", "owasp-crs-v030301-id942180-sqli"]
request_header = [
{
operator = "STARTS_WITH"
value = "lmn"
},
{
operator = "ENDS_WITH"
value = "opq"
}
]
request_uri = [
{
operator = "CONTAINS"
value = "https://hashicorp.com"
},
{
operator = "CONTAINS"
value = "https://xyz.com"
},
]
}
}
}
}
Set of IP addresses or ranges (IPV4 or IPV6) in CIDR notation to match against inbound traffic. There is a limit of 10 IP ranges per rule.
Each rule is key value pair where key is a unique name of the rule and value is the action associated with it.
"block_bad_actor_ip" = {
action = "deny(502)"
priority = 11
description = "Deny Malicious IP address"
src_ip_ranges = ["A..B.C.D", "W.X.Y.Z",]
preview = false
redirect_type = null
redirect_target = null
rate_limit_options = {}
header_action = []
}
security_rules = {
"deny_project_bad_actor" = {
action = "deny(502)"
priority = 11
description = "Deny Malicious IP address from project bad_actor"
src_ip_ranges = ["190.217.68.211/32", "45.116.227.68/32", "103.43.141.122", "123.11.215.36", ]
}
"throttle_project_droptwenty" = {
action = "throttle"
priority = 15
description = "Throttle IP addresses from project droptwenty"
src_ip_ranges = ["190.217.68.214", "45.116.227.71", ]
rate_limit_options = {
exceed_action = "deny(502)"
rate_limit_http_request_count = 10
rate_limit_http_request_interval_sec = 60
enforce_on_key_configs = [
{
enforce_on_key_type = "HTTP_PATH"
},
{
enforce_on_key_type = "HTTP_COOKIE"
enforce_on_key_name = "site_id"
}
]
}
}
}
Add Custom Rules using Common Expression Language (CEL)
Each rule is key value pair where key is a unique name of the rule and value is the action associated with it.
allow_specific_regions = {
action = "allow"
priority = 21
description = "Allow specific Regions"
preview = false
expression = <<-EOT
'[US,AU,BE]'.contains(origin.region_code)
EOT
redirect_type = null
redirect_target = null
rate_limit_options = {}
header_action = []
}
custom_rules = {
allow_specific_regions = {
action = "allow"
priority = 21
description = "Allow specific Regions"
preview = true
expression = <<-EOT
'[US,AU,BE]'.contains(origin.region_code)
EOT
}
allow_path_token_header = {
action = "allow"
priority = 25
description = "Allow path and token match with addition of header"
expression = <<-EOT
request.path.matches('/login.html') && token.recaptcha_session.score < 0.2
EOT
header_action = [
{
header_name = "reCAPTCHA-Warning"
header_value = "high"
},
{
header_name = "X-Resource"
header_value = "test"
}
]
}
}
Add Rules based on threat intelligence. Managed protection plus subscription is needed to use this feature.
Each rule is key value pair where key is a unique name of the rule and value is the action associated with it. NOTE: exclude_ip is a string with IP addresse(s) in single quotes and enclused within a sqare bracket (You can find detail here).
threat_intelligence_rules = {
deny_crawlers_ip = {
action = "deny(502)"
priority = 31
description = "Deny IP addresses of search engine crawlers"
preview = false
feed = "iplist-search-engines-crawlers"
exclude_ip = null
rate_limit_options = {}
header_action = []
}
}
threat_intelligence_rules = {
deny_malicious_ips = {
action = "deny(502)"
priority = 31
description = "Deny IP addresses known to attack web applications"
preview = true
feed = "iplist-known-malicious-ips"
exclude_ip = "['47.100.100.100', '47.189.12.139']"
}
deny_tor_exit_ips = {
action = "deny(502)"
priority = 31
description = "Deny Tor exit nodes IP addresses"
preview = true
feed = "iplist-tor-exit-nodes"
}
}
Add a rule to Automatically deploy Adaptive Protection suggested rules. Managed protection plus subscription is needed to use this feature. By default this feature is disabled. If enable is set to true you need to provide priority and action for this module to deploy auto deploy rule. Module will create a rule with expression evaluateAdaptiveProtectionAutoDeploy().
It is an object with key value pair.
adaptive_protection_auto_deploy = {
enable = true
action = "deny(502)"
priority = 31
description = "Automatically deploy Adaptive Protection suggested rules"
preview = false
load_threshold = 0.1
confidence_threshold = 0.5
impacted_baseline_threshold = 0.01
expiration_sec = 7200
redirect_type = null
redirect_target = null
rate_limit_options = {}
}
adaptive_protection_auto_deploy = {
enable = true
priority = 100000
action = "deny(403)"
}
adaptive_protection_auto_deploy = {
enable = true
priority = 100000
action = "redirect"
redirect_type = "GOOGLE_RECAPTCHA"
}
adaptive_protection_auto_deploy = {
enable = true
priority = 100000
action = "throttle"
rate_limit_options = {
exceed_action = "deny(502)"
rate_limit_http_request_count = 500
rate_limit_http_request_interval_sec = 120
enforce_on_key = "IP"
}
}
These sections describe requirements for using this module.
The following dependencies must be available:
- [Terraform][terraform] v1.3+
- [Terraform Provider for GCP][terraform-provider-gcp] plugin v4.79+
A service account with the following permission must be used to provision the resources of this module:
- compute.networkEdgeSecurityServices.create
- compute.networkEdgeSecurityServices.update
- compute.networkEdgeSecurityServices.get
- compute.networkEdgeSecurityServices.delete
- compute.networkEdgeSecurityServices.list
- compute.securityPolicies.create
- compute.securityPolicies.delete
- compute.securityPolicies.get
- compute.securityPolicies.list
- compute.securityPolicies.use
- compute.securityPolicies.update
- recaptchaenterprise.keys.list
- recaptchaenterprise.keys.get
Following roles contain above mentioned permissions. You can either assing one of the following role or create custom roles with above permissions.
- Compute Organization Security Policy Admin:
roles/compute.orgSecurityPolicyAdmin - Compute Security Admin:
roles/compute.securityAdmin - reCAPTCHA Enterprise Admin:
roles/recaptchaenterprise.admin
In order to operate with the Service Account you must activate the following API on the project where the Service Account was created:
- Compute Engine API - compute.googleapis.com
Refer to the contribution guidelines for information on contributing to this module.