AWS WAF

  • A web application firewall that helps protect web applications from attacks by allowing you to configure rules that allow, block, or monitor (count) web requests based on conditions that you define.
  • These conditions include:
    • IP addresses
    • HTTP headers
    • HTTP body
    • URI strings
    • SQL injection
    • cross-site scripting.

Features

  • WAF lets you create rules to filter web traffic based on conditions that include IP addresses, HTTP headers and body, or custom URIs.
  • You can also create rules that block common web exploits like SQL injection and cross site scripting.
  • For application layer attacks, you can use WAF to respond to incidents. You can set up proactive rules like Rate Based Blacklisting to automatically block bad traffic, or respond immediately to incidents as they happen.
  • WAF provides real-time metrics and captures raw requests that include details about IP addresses, geo locations, URIs, User-Agent and Referers.

Conditions, Rules, and Web ACLs

  • You define your conditions, combine your conditions into rules, and combine the rules into a web ACL.
  • Conditions define the basic characteristics that you want WAF to watch for in web requests.
  • You combine conditions into rules to precisely target the requests that you want to allow, block, or count. WAF provides two types of rules:
    • Regular rules – use only conditions to target specific requests.
    • Rate-based rules – are similar to regular rules, with a rate limit. Rate-based rules count the requests that arrive from a specified IP address every five minutes. The rule can trigger an action if the number of requests exceed the rate limit.
  • WAF Managed Rules are an easy way to deploy pre-configured rules to protect your applications common threats like application vulnerabilities. All Managed Rules are automatically updated by AWS Marketplace security Sellers.
  • After you combine your conditions into rules, you combine the rules into a web ACL. This is where you define an action for each rule—allow, block, or count—and a default action, which determines whether to allow or block a request that doesn’t match all the conditions in any of the rules in the web ACL.

Pricing

  • WAF charges based on the number of web access control lists (web ACLs) that you create, the number of rules that you add per web ACL, and the number of web requests that you receive.

Limits

Resource

Default Limit

Web ACLs per AWS account

50

Rules per AWS account

100

Rate-based-rules per AWS account

5

Conditions per AWS account

100 of each condition type

 

Sources:
https://docs.aws.amazon.com/waf/latest/developerguide
https://aws.amazon.com/waf/features/
https://aws.amazon.com/waf/pricing/
https://aws.amazon.com/waf/faqs/

***

AWS Certified Solutions Architect is consistently among the top paying IT certifications in the world, considering that Amazon Web Services is the leading cloud services platform with almost 50% market share! Earn over $150,000 per year with an AWS certification!

Subscribe to our newsletter for more helpful AWS training notes and blogs like this and answer as many AWS practice exams as you can. 🙂

Enroll Now – AWS Certified Solutions Architect Associate Practice Exams

AWS Certified Solutions Architect Associate

Enroll Now – AWS Certified Solutions Architect Professional Practice Exams

AWS Certified Solutions Architect Professional Tutorials Dojo

Enroll Now – AWS Certified SysOps Administrator Associate Practice Exams

AWS Certified SysOps Administrator Associate Tutorials Dojo

Enroll Now – AWS Certified Developer Associate Practice Exams

AWS Certified Developer Associate Tutorials Dojo

Recent Tweets

Recent Posts

Categories

Subscribe to our Newsletter
Sign up now and have the latest tech tutorials delivered straight to your mailbox.

PLUS: Upgrade your career by getting exclusive access to recent AWS exam passers' tips, freebies, promotions and lots more!
I agree to have my personal information transfered to AWeber ( more information )