The Best Web Application Firewalls



After reading this article you will gain the following knowledge:

  • What is a web application?
  • what is a firewall and what’s the functionality of the firewalls?
  • Define web application firewall
  • Best WAFs Web Application Firewalls

Best Web Application Firewalls

When anyone sees the topic of the article name, two questions are initiated in mind. The first one is “what is a web application?” and  “what is a firewall and what’s the functionality of the firewalls?”.

What is a Web Application?

A web application is computer software that performs operations over the Internet using web browsers and web technology.

Web apps are often developed in browser-supported languages like JavaScript and HTML since they rely on the browser to render the program executable. Some of the applications are dynamic and require processing on the server. Others are entirely static, with no processing needed for the server.

What is a firewall: Discuss the Functionality of Firewalls?

A web application firewall (WAF) acts as a barrier between a web application and the Internet, preventing numerous typical threats.

What is a Web Application Firewall (WAF)?

By monitoring and screening HTTP traffic between a web application and the Internet, a WAF, or web application firewall, aids in the security of online applications. File inclusion, cross-site scripting (XSS), SQL injection, cross-site forgery, and cross-site forgery are common vulnerabilities that it protects web applications.

In the OSI model, a WAF is a protocol layer 7 defense that is not designed to defend against all types of attacks. This form of attack mitigation is typically part of a wider group of technologies that work together to provide comprehensive protection against a wide range of threats.

A WAF acts as a barrier between a web application and the Internet when it is installed in front of it. A web application firewall (WAF) is a type of reverse proxy that prevents a server from being hacked by requiring clients to transit through it first. A WAF is a type of reverse proxy that protects the server from exposure by requiring clients to transit through the WAF before accessing the server.

While a proxy server uses an intermediate to shield the identity of a client machine, a WAF is a type of reverse proxy that protects the server from exposure by requiring clients to transit through the WAF before accessing the server.

Policies, which are a set of regulations, regulate a WAF. By prohibiting harmful communications, these policies seek to guard against application vulnerabilities. The utility of a WAF is derived in part from the speed and ease with which policy updates may be made, allowing for speedier response to various attack vectors; for example, rate limiting can be immediately deployed during a DDoS attack by altering WAF policies.

How Web Application Firewalls Works?

In the field of Web Application development need protection from external and internal cyber-attacks so for protection from attacks need to deploy a firewall that helps to protect from attacks. To achieve these requirements need different best WAFs (Web Application Firewalls) are explained one by one.

Amazon AWS Web Application Firewall 

Look no further if you’re looking for an Amazon Web Service (AWS) cloud-native solution. Amazon has long dominated the cloud environment, and AWS continues to extend its offerings fifteen years after its launch.

Networks are protected from the most frequent web application and API attacks thanks to a high-quality pre-configured set of rules administered by AWS. AWS WAF Bot Control, for example, provides visibility and control over the suspect and reactive traffic.


Barracuda Networks, based in Campbell, California, is a network appliance and cloud service provider. The WAF product line from Barracuda Networks is available as a hardware appliance, a virtual appliance, or a cloud-based Barracuda CloudGen Firewall for AWS, Azure, and Google Cloud Platform. According to clients, Barracuda WAF is simple to use, provides excellent customer support, and includes free access to Barracuda’s vulnerability remediation service.


Cloudflare is a web infrastructure and cybersecurity company founded in 2009 in San Francisco, California. With its content delivery network (CDN) services, Cloudflare protects almost 25 million websites, ranging from defending corporations at the network edge to neutralizing DDoS attacks. Because of its large network, Cloudflare can give the most up-to-date threat intelligence at scale.


F5, situated in Seattle, dates back to the release of the BIG-IP load balancer in the mid-1990s. Development of F5 Advanced WAF became unavoidable when the firm added appliances, software, and solutions-oriented application layer security.

F5 provides industry-leading capabilities such as behavioral analytics and machine learning, as well as in-browser data encryption and an anti-bot mobile SDK. F5 is consistently a top choice among people who are considering various WAF solutions.


Fortinet has been a fixture in the cybersecurity market since 2000, and its series of firewalls, including the FortiWeb web application firewall, is well-known. The Sunnyvale, California-based company offers a WAF solution that can adapt to changing application attack surfaces. FortiWeb is an innovative solution for web application and API security and bot mitigation that uses two levels of machine learning.


WEBcohort, a California start-up, was an early vendor of web application firewall technology in 2003. Imperva is at the best WAF business after a few years and a name change. Imperva WAF enables clients to deploy the solution on-premises (WAF Gateway) as well as in cloud services such as AWS and Azure (Cloud WAF). Imperva claims security at DevOps speed, with over 600 million daily assaults blocked and a 99.999 percent uptime SLA.


In 2008, Microsoft, based in Redmond, Washington, debuted its Azure cloud service. The Azure WAF provides an easy-to-deploy solution that is integrated with Azure Security Center features for Microsoft’s network of clients. Azure, as a cloud-based WAF, provides flexible, scalable pricing as well as a regional expansion strategy that expands Microsoft’s footprint.

With Radware Cloud WAF, the American-Israeli cybersecurity firm continues to develop in the WAF market, collecting many honors in recent years. In the Gartner 2020 Magic Quadrant best WAFs, Radware was named a visionary in the WAF industry for bot prevention, ML-based API security, and out-of-path deployment. Bandwidth for DDoS mitigation


Radware Cloud WAF, a product of the American-Israeli cybersecurity firm Radware, continues to innovate in the WAF field, collecting many honors in recent years. In Gartner’s 2020 Magic Quadrant for WAF, Radware was named a visionary in the WAF industry for bot protection, machine learning-based API security, and out-of-path deployment.


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