WAFWikiIndependent WAF intelligence
中文

WAFWiki index

Search WAFWiki

Type at least 2 characters to search the full research library.

WAF installation guide

AWS WAF CloudFormation Template Guide

A reviewable AWS WAFv2 CloudFormation template workflow covering scope, managed rules, count mode, logging, validation, deployment, and rollback.

Quick answer

How to use this AWS WAF CloudFormation Template Guide

Treat the CloudFormation stack as a versioned security change: deploy a minimal web ACL, inspect the change set, validate associations and metrics, and prove stack rollback before adding rules.

Difficulty
Intermediate
Time
60-120 minutes for a controlled AWS proof of concept
Updated
2026-07-17

Guide data

Difficulty
Intermediate
Time
60-120 minutes for a controlled AWS proof of concept
Updated
2026-07-17
Use case
Useful when teams search for an AWS WAF template or want to manage web ACL changes through infrastructure as code.

Prerequisites

  • An AWS account with permission to validate and deploy CloudFormation stacks.
  • A decision between CLOUDFRONT scope and REGIONAL scope.
  • A staging CloudFront, ALB, API Gateway, or AppSync entry point.
  • A logging destination and rollback owner.

Deployment workflow

Make the web ACL change reviewable and reversible as code.

1

Choose scope and association separately

The WebACL scope belongs in the template, while the protected-resource association should be reviewed as its own architecture decision. CloudFront-scoped WAF resources are managed in us-east-1; regional resources follow the application region.

  • CLOUDFRONT or REGIONAL scope is explicit.
  • The target resource and region are documented.
  • The team knows how to detach the web ACL without deleting evidence.
2

Start managed rules in count mode

A starter template should prioritize observability. Override a managed rule group to count during the first traffic review, enable sampled requests, and use a stable metric name before considering blocking.

  • Rule priority is deterministic.
  • VisibilityConfig is enabled.
  • Count-mode review is part of the rollout plan.
3

Keep logging and exclusions reviewable

Logging configuration, redacted fields, managed rule changes, and exclusions should be versioned with the same change record. Avoid console-only changes that drift away from the template.

  • Log destination and retention are documented.
  • Rule exclusions include a business reason.
  • Console changes are detected or prohibited by process.
4

Deploy to one controlled entry point

Validate the template, deploy a dedicated proof-of-concept stack, associate it with one low-risk resource, and review clean traffic before promoting the same pattern.

  • CloudFormation validation passes.
  • The created web ACL is visible in the expected scope.
  • Sampled requests and logs contain the expected application traffic.

Validation checklist

  • Validate the template before deployment.
  • Confirm the web ACL is created in the correct scope and region.
  • Review clean application traffic in sampled requests and logs.
  • Estimate cost using the deployed rule groups, requests, and logging volume.

Rollback planning

  • Detach the web ACL from the protected resource before deleting the test stack.
  • Keep managed rules in count mode while investigating false positives.
  • Retain logs and the deployed template version long enough to explain the change.

Common mistakes

  • Using REGIONAL scope for CloudFront or forgetting the us-east-1 management requirement.
  • Deploying managed rules directly into blocking behavior without clean-traffic review.
  • Making console changes that are not represented in the CloudFormation template.

Related WAF profiles

AWS WAF

Lab verification

Commands to capture during the proof of concept

These checks are intentionally conservative. Replace hostnames and ports with your lab values, then save the outputs with the test notes.

1

Start with a count-mode WAFv2 template

AWSTemplateFormatVersion: "2010-09-09"
Resources:
  WebAcl:
    Type: AWS::WAFv2::WebACL
    Properties:
      Name: wafwiki-lab
      Scope: CLOUDFRONT
      DefaultAction:
        Allow: {}
      VisibilityConfig:
        CloudWatchMetricsEnabled: true
        MetricName: wafwiki-lab
        SampledRequestsEnabled: true
      Rules:
        - Name: AWSManagedCommon
          Priority: 0
          OverrideAction:
            Count: {}
          Statement:
            ManagedRuleGroupStatement:
              VendorName: AWS
              Name: AWSManagedRulesCommonRuleSet
          VisibilityConfig:
            CloudWatchMetricsEnabled: true
            MetricName: wafwiki-common
            SampledRequestsEnabled: true

The template creates a CloudFront-scoped web ACL with the AWS managed common rule group overridden to count for observation.

2

Validate the template locally

aws cloudformation validate-template --template-body file://waf.yaml --region us-east-1

AWS returns the parsed template description without a validation error.

3

Deploy a dedicated lab stack

aws cloudformation deploy --template-file waf.yaml --stack-name wafwiki-waf-lab --region us-east-1

CloudFormation completes the stack and the web ACL appears in the CloudFront scope.

FAQ

What does the AWS WAF CloudFormation Template Guide workflow validate?

It validates template structure, scope selection, resource association, rule priorities, visibility configuration, change-set review, and repeatable deletion or rollback.

What must pass before AWS WAF CloudFormation Template Guide is used in production?

Require linting, change-set approval, a non-production deployment, drift review, logging destinations, deletion policy, and a tested rollback before production stack updates.

Sources