[Fix] 취약점 스캐닝, 크롤링 방지 장기 대응 작업

terraform/common/locals.tf

@@ -4,6 +4,7 @@ data "aws_region" "current" {}
 locals {
   group_name   = "power"
   project_name = "eatda"
+  admin_email  = "yappweb1server@gmail.com"
 
   policy_arns = [
     "arn:aws:iam::aws:policy/AdministratorAccess",
@@ -248,3 +249,7 @@ locals {
     }
   }
 }
+
+locals {
+  request_threshold = 200
+}

terraform/common/main.tf

@@ -51,3 +51,27 @@ module "alb" {
   certificate_arn                 = module.route53.certificate_arn
   certificate_validation_complete = module.route53.certificate_validation_complete
 }
+
+module "waf" {
+  source            = "./waf"
+  project_name      = local.project_name
+  request_threshold = local.request_threshold
+  tags              = local.common_tags
+}
+
+resource "aws_wafv2_web_acl_association" "this" {
+  resource_arn = module.alb.alb_arn
+  web_acl_arn  = module.waf.web_acl_arn
+}
+
+resource "aws_cloudwatch_log_group" "waf_logs" {
+  name              = "aws-waf-logs-${local.project_name}"
+  retention_in_days = 7
+
+  tags = local.common_tags
+}
+
+resource "aws_wafv2_web_acl_logging_configuration" "this" {
+  log_destination_configs = [trimsuffix(aws_cloudwatch_log_group.waf_logs.arn, ":*")]
+  resource_arn            = module.waf.web_acl_arn
+}

terraform/common/waf/main.tf

@@ -0,0 +1,156 @@
+resource "aws_wafv2_web_acl" "this" {
+  name  = "${var.project_name}-web-acl"
+  scope = "REGIONAL"
+
+  default_action {
+    allow {}
+  }
+
+  # Rate-based Rule (HTTP Flood)
+  rule {
+    name     = "Rate-Limit-Rule"
+    priority = 1
+    action {
+      block {}
+    }
+    statement {
+      rate_based_statement {
+        limit              = var.request_threshold
+        aggregate_key_type = "IP"
+      }
+    }
+    visibility_config {
+      cloudwatch_metrics_enabled = true
+      metric_name                = "rate-limit-rule"
+      sampled_requests_enabled   = true
+    }
+  }
+
+  # AWS Managed Core Rule Set
+  rule {
+    name     = "AWS-Managed-Core-Rule-Set"
+    priority = 10
+    override_action {
+      none {}
+    }
+    statement {
+      managed_rule_group_statement {
+        vendor_name = "AWS"
+        name        = "AWSManagedRulesCommonRuleSet"
+      }
+    }
+    visibility_config {
+      cloudwatch_metrics_enabled = true
+      metric_name                = "aws-managed-common"
+      sampled_requests_enabled   = true
+    }
+  }
+
+  # Scanners & Probes Protection
+  rule {
+    name     = "AWS-Managed-Known-Bad-Inputs-Rule-Set"
+    priority = 20
+    override_action {
+      none {}
+    }
+    statement {
+      managed_rule_group_statement {
+        vendor_name = "AWS"
+        name        = "AWSManagedRulesKnownBadInputsRuleSet"
+      }
+    }
+    visibility_config {
+      cloudwatch_metrics_enabled = true
+      metric_name                = "aws-managed-bad-inputs"
+      sampled_requests_enabled   = true
+    }
+  }
+
+  # Reputation Lists Protection
+  rule {
+    name     = "AWS-Managed-Amazon-IP-Reputation-List"
+    priority = 30
+    override_action {
+      none {}
+    }
+    statement {
+      managed_rule_group_statement {
+        vendor_name = "AWS"
+        name        = "AWSManagedRulesAmazonIpReputationList"
+      }
+    }
+    visibility_config {
+      cloudwatch_metrics_enabled = true
+      metric_name                = "aws-managed-ip-rep"
+      sampled_requests_enabled   = true
+    }
+  }
+
+  # Bad Bot Protection
+  rule {
+    name     = "AWS-Managed-Bot-Control-Rule-Set"
+    priority = 40
+    override_action {
+      none {}
+    }
+    statement {
+      managed_rule_group_statement {
+        vendor_name = "AWS"
+        name        = "AWSManagedRulesBotControlRuleSet"
+      }
+    }
+    visibility_config {
+      cloudwatch_metrics_enabled = true
+      metric_name                = "aws-managed-bot-control"
+      sampled_requests_enabled   = true
+    }
+  }
+
+  # Anonymous IP list
+  rule {
+    name     = "AWS-Managed-Anonymous-IP-List"
+    priority = 50
+    override_action {
+      none {}
+    }
+    statement {
+      managed_rule_group_statement {
+        vendor_name = "AWS"
+        name        = "AWSManagedRulesAnonymousIpList"
+      }
+    }
+    visibility_config {
+      cloudwatch_metrics_enabled = true
+      metric_name                = "aws-managed-anonymous-ip"
+      sampled_requests_enabled   = true
+    }
+  }
+
+  # SQL database
+  rule {
+    name     = "AWS-Managed-SQLi-Rule-Set"
+    priority = 60
+    override_action {
+      none {}
+    }
+    statement {
+      managed_rule_group_statement {
+        vendor_name = "AWS"
+        name        = "AWSManagedRulesSQLiRuleSet"
+      }
+    }
+    visibility_config {
+      cloudwatch_metrics_enabled = true
+      metric_name                = "aws-managed-sql-db"
+      sampled_requests_enabled   = true
+    }
+  }
+
+  visibility_config {
+    cloudwatch_metrics_enabled = true
+    metric_name                = "${var.project_name}-web-acl"
+    sampled_requests_enabled   = true
+  }
+
+  tags = var.tags
+}

terraform/common/waf/outputs.tf

@@ -0,0 +1,3 @@
+output "web_acl_arn" {
+  value = aws_wafv2_web_acl.this.arn
+}

terraform/common/waf/variables.tf

@@ -0,0 +1,12 @@
+variable "project_name" {
+  type = string
+}
+
+variable "request_threshold" {
+  type        = number
+  description = "Rate-Limit 규칙에 적용할 5분당 IP별 최대 요청 수"
+}
+
+variable "tags" {
+  type = map(string)
+}

terraform/prod/terraform.tfvars

@@ -11,7 +11,7 @@ ecs_services = {
   datadog = {
     task_definition     = "datadog"
     launch_type         = "EC2"
-    scheduling_strategy = "REPLICA"
+    scheduling_strategy = "DAEMON"
   }
 }
 
@@ -49,6 +49,9 @@ ecs_task_definitions_base = {
       DD_LOGS_CONFIG_CONTAINER_COLLECT_ALL = "true"
       DD_APM_RECEIVER_PORT                 = "8126"
       DD_APM_NON_LOCAL_TRAFFIC             = "true"
+      DD_EC2_USE_IMDSV2                    = "true"
+      DD_COLLECT_EC2_TAGS                  = "true"
+      DD_COLLECT_EC2_METADATA              = "true"
       DD_SERVICE                           = "eatda-api-prod"
       DD_ENV                               = "prod"
       DD_VERSION                           = "v1"