Hidden deep within the recesses of AWS’s WAF documentation lies an ominous note: Having configured your WebACL (whether it is by selecting rule groups from the AWS Managed Rules or painstakingly crafting the perfect regular expressions to detect the latest CVE targeting your web apps and mock attackers trying to abuse it) and attached it to your AWS resource, you pat yourself on the back and relax, dreaming of finally taking a well-earned vacation as your glorious WebACL fends off the hoards of attackers assailing your web app. deploying agents on your endpoints, something you couldn’t do when working with something like Lambda until recently with the introduction Lambda Extensions)īoth of which complicate your architecture and less than ideal.re-architecting your design to have traffic go through a vendor’s virtual appliances.Traditionally, deploying WAFs from other vendors in AWS involved either: Although it does have a number of disadvantages (which I hope to cover in a future post) that you should consider before selecting it and its feature set and available rules fall short of more established WAFs such as ModSecurity and Signal Sciences, its ability to seamlessly integrate with your current architecture in AWS is a strong selling point. Which basically covers any type of web application deployment in AWS. Its deployment options include attaching AWS WAF to your: automation (you can easily define, deploy and re-use your WAF rules using CloudFormation or Terraform or your favorite IaC tool).available rulesets to use out of the box.If you’re an AWS customer, the natural choice is AWS WAF.
They can also increase the time and cost of exploitation of known vulnerabilities and to serve as an early warning system of suspicious user activity (application logging typically falls short in this regard). As with any security solution, they aren’t a silver bullet but they can add a valuable layer of defense and give your team extra time to patch vulnerabilities in your application. WAFs are often used to protect web apps and APIs from common security attacks such as SQL injection, cross-site scripting, cross-site request forgery, and other attacks. If you are running any type of web application, you might have deployed a Web Application Firewall (WAF). AWS WAF’s defaults make bypassing trivial in POST requests, even when you enable the AWS Managed Rules
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