AWS WAF
Web application firewalls (WAF)
DevSecOps software
- Features
- Ease of use
- Ease of management
- Quality of support
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What is AWS WAF
AWS WAF is a cloud-based web application firewall that helps protect web applications and APIs from common web exploits and unwanted traffic. It is used by security and platform teams operating workloads on AWS, including applications fronted by Amazon CloudFront, Application Load Balancer (ALB), API Gateway, and AWS AppSync. The service uses managed rule groups and custom rules (including rate-based rules) and integrates with AWS logging and monitoring services for visibility and incident response. It is typically deployed and maintained via AWS console, APIs, and infrastructure-as-code workflows.
Native AWS service integration
AWS WAF integrates directly with key AWS edge and application entry points such as CloudFront, ALB, API Gateway, and AppSync. This reduces the need for separate proxy appliances or traffic re-architecture when protecting AWS-hosted applications. It also ties into AWS identity and access controls for administration and automation. For organizations standardized on AWS, this can simplify deployment and operations.
Managed rules and automation
AWS WAF provides AWS Managed Rules and supports third-party managed rule groups, enabling faster baseline coverage for common threats. Teams can create custom rules, rate-based rules, and IP reputation controls, and manage them via API/SDK and infrastructure-as-code. This supports DevSecOps workflows where rule changes are versioned and promoted through environments. It also supports centralized policy patterns through reusable rule groups.
Logging and security visibility
AWS WAF can send detailed request logs to Amazon Kinesis Data Firehose and integrate with Amazon CloudWatch metrics and alarms. This enables security teams to build detections, dashboards, and incident workflows using AWS-native tooling. Visibility can be correlated with other AWS telemetry (for example, load balancer logs and application logs). These integrations help with auditability and operational troubleshooting.
AWS-centric deployment scope
AWS WAF primarily protects resources integrated with AWS services (for example CloudFront, ALB, API Gateway, AppSync). Protecting applications outside AWS or in multi-cloud environments typically requires additional tooling or different architectures. Organizations with heterogeneous environments may find policy standardization harder across platforms. This can increase operational complexity when compared with more environment-agnostic approaches.
Rule tuning requires expertise
Effective protection often requires tuning managed rules, writing custom rules, and managing exceptions to reduce false positives. The rule language and evaluation order can be non-trivial for teams without dedicated WAF experience. Misconfiguration can lead to blocked legitimate traffic or insufficient coverage. Ongoing maintenance is usually needed as applications and attack patterns change.
Cost and log volume management
Pricing is usage-based (for example, per web ACL, rules, and request volume), and costs can rise with high-traffic applications. Detailed logging can generate significant data volumes, which can increase downstream storage and analytics costs. Teams may need to balance visibility with cost by sampling, filtering, or limiting retention. Budgeting can be less predictable than fixed-capacity approaches.
Plan & Pricing
Pricing model: Pay-as-you-go Free tier/trial: No permanent free plan for AWS WAF overall. Feature-specific free allowances: Common Bot Control includes the first 10 million requests/month free; Targeted Bot Control includes the first 1 million requests/month free. AWS Shield Advanced subscribers receive limited AWS WAF usage as part of Shield Advanced.
Example costs / key SKUs (from AWS official pricing page):
- Web ACL: $5.00 per Web ACL per month (prorated hourly).
- Rule: $1.00 per rule per month (prorated hourly).
- Rule group / managed rule group: $1.00 per rule group or managed rule group per month (prorated hourly).
- Request processing: $0.60 per 1 million requests processed by the Web ACL (example/regional). Example for Web ACLs associated with CloudFront distributions shows $0.80 per 1 million requests in the CloudFront example.
- Additional WCU charges: $0.20 per 1 million requests for each 500 WCUs the Web ACL uses beyond the default allocation of 1500.
- Additional body-inspection charges: $0.30 per 1 million requests for each additional 16 KB analyzed beyond the default request body inspection limit.
- Oversized request handling (example): $0.90 per 1 million for a 32 KB body example shown.
- CAPTCHA attempts: $0.40 per 1,000 CAPTCHA attempts (example shown in pricing examples).
Additional features (examples / notes):
- Bot Control: example subscription charge shown as $10.00 per WebACL (prorated hourly) plus per-request fees. Common Bot Control includes the first 10M requests/month free then request fees shown (example: $1.00 per 1M requests in examples); Targeted Bot Control includes the first 1M requests/month free and higher analysis request fee in examples (example: $10.00 per 1M requests shown).
- Fraud Control (Account Takeover Prevention / Account Creation Fraud Prevention): subscription fee example $10.00 per WebACL plus tiered per-request analysis fees (examples show very large per-million rates for certain volume bands; see official page for full tier details).
- Managed rule groups from AWS Marketplace: sellers set additional fees (both monthly subscription and per-request) which are charged in addition to AWS WAF fees.
- Pricing may vary across AWS Regions; monthly fees are prorated hourly. AWS WAF charges are in addition to other AWS service charges (CloudFront, ALB, API Gateway, etc.).
Discount options / notes:
- Managed rule groups from AWS Marketplace may have seller-set pricing and fees; contact the seller or AWS for quotes.
- AWS offers a Pricing Calculator and "Get pricing assistance" for personalized estimates.
(Information sourced exclusively from the official AWS WAF pricing page.)
Seller details
Amazon Web Services, Inc.
Seattle, Washington, USA
2006
Subsidiary
https://aws.amazon.com/
https://x.com/awscloud
https://www.linkedin.com/company/amazon-web-services/
