AWS WAF – Web Application Firewall

AWS WAF – Web Application Firewall

May 29, 2020 / Nirav S

AWS WAF is a web application firewall that helps protect your applications from attacks. In WAF, there are pre-configured rules which help to allow, block or monitor specific IPs. And these rules are applied to protect applications from common threats like application vulnerabilities like OWASP, bots, or Common Vulnerabilities and Exposures (CVE).

AWS WAF allows the following feature:

Web traffic filtering:- They filter the ip and if the ip are not mentioned on rule they can block it. AWS WAF allows you to create a centralized set of rules that you can deploy across multiple websites.
Real-time visibility:- AWS WAF provides real-time output that include details about IP addresses, geo locations, URIs. AWS WAF is fully integrated with Amazon CloudWatch, so that you can easily set up custom alarms when thresholds are exceeded or particular attacks occur.

Before we set up on AWS console in some time, we have to keep in mind:

  • AWS WAF is integrated with AWS CloudFront – which supports custom origins outside of AWS.
  • You can configure custom error pages.
  • Real time metrics can be monitored from CloudWatch.
  • AWS WAF can inspect HTTPS traffic.

Now let’s see how can we set up on console

Select “WAF & Shield” on AWS console.

AWS console select WAF & Shield

Click “Go to AWS WAF”

AWS WAF and AWS shield

Select “Web ACLs” from the AWS WAF console

AWS WAF console Web ACLs

Click “Create web ACL” and Enter “Web ACL name” and select “Region”. When you have decided which resource should be attached to the Web ACL, select “AWS resource to associate” and then click “Next”.

AWS console name web ACL

Now you have to select some WAF Conditions,

WAF Conditions selection options

WAF Rules

Once you are done with configuring conditions, you can create a rule and attach it to your web ACL. You can attach more than one rule to an ACL.

Add rules to WAF web ACL

On the last page, review your settings and click “Confirm and create”

Review and confirm create WAf console

Pricing

First, you pay only for what you use. There are no minimum fees and no upfront commitments. Your costs will depend on three major variables:

  • Number of Web ACLs: each Web ACL will cost you $5/month.
  • Number of Rules: $1.00 per rule per web ACL per month.
  • Request Count: $0.60 per million web requests.

Summary

In this blog, we explained steps to create a Web ACL and the process of setting up an AWS console.

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