Best Web Application Firewalls (WAF) for On-Premises of 2025

CacheGuard product line is based on a core product called CacheGuard-OS. Once installed on a bare metal or virtual machine, CacheGuard-OS transforms that machine into a powerful network appliance . The resulted appliance can then be implemented as different types of Gateways to Secure & Optimize your network. See below a brief description of all CacheGuard appliances. - Web Gateway: gain control over the Web traffic in your organization & filter unwanted Web traffic in your organization. - UTM (Unified Threat Management) : secure your networks against all kind of threats coming from the internet with a Firewall, an Antivirus at the Gateway, a VPN server and a Filtering proxy. - WAF (Web Application Firewall): block malicious requests on your critical Web applications and protect your business. The WAF integrates OWASP rules with the possibility to design your own custom rules. In addition, an IP reputation based filtering allows you to block IPs listed in real time blacklists. - WAN Optimizer : prioritize your critical network traffic, save your precious bandwidth and get High Availability for your internet access through multiple ISP.

You can get comprehensive protection for both on-premises and multicloud deployments with the firewall built in or for the cloud. Advanced Threat Protection, which is cloud-hosted, detects and blocks advanced threats including zero-day attacks and ransomware attacks. With the help of a global threat network that is fed by millions data collection points, you can quickly protect yourself against the latest threats. Modern cyber threats like ransomware, advanced persistent threats, targeted attack, and zero-day threat require sophisticated defense techniques that combine accurate threat detection with quick response times. Barracuda CloudGen Firewall provides a comprehensive suite of next-generation firewall technologies that provide real-time protection against a wide range of network threats, vulnerabilities and exploits. This includes SQL injections and cross-site scripting, denial-of-service attacks, trojans and viruses, worms and spyware.

Our SaaS-delivered WAF can mitigate web app attacks and vulnerabilities by providing comprehensive security controls, uniform policy, and observability. It is quick to deploy and manage and scales across any environment. Simplify app protection by integrating core security functionality into the development process. This is done with centralized orchestration and oversight. F5 Distributed Cloud Waf reduces the complexity and burden of consistently securing applications across clouds, on premises, and edge locations. SecOps and DevOps can work together to deliver the programmability and oversight that SecOps demands, enabling faster and more secure application release cycles. Improve visibility and insight into all security events, including WAF signatures, DoS events and automated and persistent threats. Also, all other client interactions, app performance and intuitive drill-down capabilities.

Fortinet, a global leader of cybersecurity solutions, is known for its integrated and comprehensive approach to safeguarding digital devices, networks, and applications. Fortinet was founded in 2000 and offers a variety of products and solutions, including firewalls and endpoint protection systems, intrusion prevention and secure access. Fortinet Security Fabric is at the core of the company's offerings. It is a unified platform which seamlessly integrates security tools in order to deliver visibility, automate, and real-time intelligence about threats across the network. Fortinet is trusted by businesses, governments and service providers around the world. It emphasizes innovation, performance and scalability to ensure robust defense against evolving cyber-threats while supporting digital transformation.

The most popular hybrid and multi-cloud platform, which provides next-gen WAF and API Security, RASP Advanced Rate Limiting, Bot Security, RASP, Bot Protection, and DDoS designed to eliminate legacy WAF challenges. Legacy WAFs were not designed to support today's web applications that are distributed across cloud and hybrid environments. Our next-generation web application firewall (NGWAF), and runtime app self protection (RASP), increase security and reliability without sacrificing speed. All at the lowest total cost (TCO).

Alert Logic is the only managed detection and response (MDR) provider that delivers comprehensive coverage for public clouds, SaaS, on-premises, and hybrid environments. Our cloud-native technology and white-glove team of security experts protect your organization 24/7 and ensure you have the most effective response to resolve whatever threats may come.

open-appsec is an open-source initiative that builds on machine learning to provide pre-emptive web app & API threat protection against OWASP-Top-10 and zero-day attacks. It can be deployed as add-on to Kubernetes Ingress, NGINX, Envoy and API Gateways. The open-appsec engine learns how users normally interact with your web application. It then uses this information to automatically detect requests that fall outside of normal operations, and sends those requests for further analysis to decide whether the request is malicious or not. open-appsec uses two machine learning models: 1. A supervised model that was trained offline based on millions of requests, both malicious and benign. 2. An unsupervised model that is being built in real time in the protected environment. This model uses traffic patterns specific to the environment. open-oppsec simplifies maintenance as there is no threat signature upkeep and exception handling, like common in many WAF solutions.

Advanced load balancing solution for high-performance applications that ensures your applications are highly available, accelerated, secure, and reliable. Ensure reliable and efficient application delivery across multiple datacenters. Reduce latency and downtime and improve the end-user experience Advanced SSL/TLS offload, single-sign-on (SSO), DDoS protection, and Web Application Firewall capabilities increase application security. Integrate the Harmony™, Controller to gain per-application visibility and complete controls for secure application delivery across public, private, and hybrid clouds. Full-proxy Layer 4 and Layer 7 loadbalers with flexible aFleX® scripting, customizable server health checks and customizable server monitoring. High-performance SSL Offload with the most current SSL/TLS encryption enables secure and optimized application service. Global Server Load Balance (GSLB), extends load balancing to a global level.

BIG-IP Next WAF is a containerized environment that provides continuous protection for web apps. It simplifies management and ensures superior security. Advanced capabilities make it simple to identify and mitigate threats. Save time by reducing the initial tuning phase and completing configuration workflows. You can also quickly enter blocking mode. With actionable dashboards for incidents across multiple policies, you can simplify detection and response to threats. Maintain consistent app-security policies across environments – whether in the datacenter, at the edge or on the public cloud. To increase security coverage, you can purchase additional licenses through a simple platform mechanism. Defend against known vulnerabilities and common attack vectors. F5's expert threat researchers can automatically mitigate active attack campaigns by deploying intelligent updates. Deliver contextual awareness to your users by blocking and identifying known bad IP addresses.

Protect your applications from unwanted and malicious internet traffic using a cloud-based, PCI compliant, global web application firewall service. Oracle Cloud Infrastructure Web Application Firewall combines threat intelligence with consistent rule enforcement to strengthen defenses and protect internet-facing applications servers. A web application firewall is a tool that combines threat intelligence from multiple sources, including WebRoot BrightCloud®, and more than 250 predefined OWASP and application rules. This allows you to adopt an edge security strategy. Access controls based on geolocation, whitelisted and blacklisted IP addresses as well as HTTP URL and HTTP header, protect Oracle Cloud Infrastructure applications on-premises and in multicloud environments. You can identify and block malicious bot traffic using an advanced set verification methods, such as JavaScript, CAPTCHA and device fingerprinting.

BunkerWeb, a Web Application Firewall of the next generation and open source (WAF), is a powerful tool. It is a full-featured server that uses NGINX as its backend. This will make your web services "secure by default". BunkerWeb integrates seamlessly with your existing environments, including Linux, Docker Swarm, Kubernetes ...), and is fully configurable. BunkerWeb makes cybersecurity a breeze. BunkerWeb includes primary security features in its core, but can be easily expanded with additional ones using a plugin system).

Our WAF is a flexible component of defense-in depth security. It can be deployed as a stand-alone solution, integrated seamlessly with our ADS Series for enhanced protection or cloud-based for unmatched flexibility. Protect APIs against a variety of attacks. Detect and stop bots from accessing web applications. Analyze user behavior to identify and block malicious activity. Cloud-based deployment is easier to scale and manage. Virtually patch web application vulnerabilities without the need to update the application. Our cutting-edge WAF is designed to protect your applications from evolving threats. Our solution uses semantic analysis, intelligence analytics, threat information, and smart patches to identify and neutralize a wide range of web attacks including all OWASP Top 10 attacks, DDoS, etc.