List of the Top 16 On-Prem Firewall Software in 2025

Enforza offers a robust cloud firewall solution designed for enterprise needs, utilizing an innovative network security platform. Our technology converts Linux instances into powerful firewall appliances featuring in-depth packet inspection. Key Features: • Stateful inspection for Layer 4-7 firewall defense • Tailored rule creation with protocol-specific filtering options • Enhanced NAT functionalities, including SNAT and DNAT • Enforcement of security policies across VPC/VNET environments • Minimal latency impact, measured in sub-milliseconds Enforza simplifies the firewall setup process while outperforming traditional cloud-native options. Experience effective firewall protection without incurring the data processing charges associated with services like AWS Network Firewall, Azure Firewall, and NAT Gateways. Secure your cloud infrastructure in no time. For detailed technical specifications, visit enforza.com/firewall.

Secure both on-premises and multi-cloud environments with a comprehensive firewall solution specifically designed for cloud security. The seamless, cloud-based Advanced Threat Protection system efficiently detects and mitigates sophisticated threats, including zero-day exploits and ransomware incidents. With access to an extensive global threat intelligence network, informed by millions of data points, organizations can quickly respond to new and evolving threats. As modern cyber risks, such as ransomware and advanced persistent threats, continue to escalate, the need for sophisticated defensive strategies that ensure accurate threat detection and rapid response becomes paramount. The Barracuda CloudGen Firewall offers a robust array of next-generation firewall technologies, providing immediate defense against a diverse range of network risks, vulnerabilities, and attacks including SQL injections, cross-site scripting, denial of service assaults, and various types of malware. This powerful solution not only bolsters security but also facilitates adherence to industry regulations, thereby becoming an indispensable asset for any organization dedicated to protecting its digital resources. Moreover, with the increasing complexity of cyber threats, the importance of integrating advanced security measures cannot be overstated.

The pfSense initiative offers a cost-free network firewall solution, built upon the FreeBSD operating system and featuring a tailored kernel. Additionally, it encompasses various third-party open-source software packages. Thanks to its package management system, pfSense can deliver functionalities that rival or exceed those of standard commercial firewalls, all without any imposed restrictions. As a result, it has supplanted numerous leading commercial firewalls in installations worldwide, such as those from Check Point, Cisco PIX, Cisco ASA, and Juniper, demonstrating its growing popularity and reliability in the cybersecurity landscape. This shift reflects the increasing trust users place in open-source solutions for their network security needs.

Fortinet emerges as a key global player in the cybersecurity sector, notable for its comprehensive and integrated approach to safeguarding digital infrastructures, devices, and applications. Founded in 2000, the organization provides a wide range of products and services, including firewalls, endpoint protection, intrusion prevention systems, and secure access solutions. A cornerstone of its offerings is the Fortinet Security Fabric, a unified platform that seamlessly combines various security tools to enhance visibility, automation, and provide real-time threat intelligence across the entire network. Renowned for its dependability among businesses, government agencies, and service providers worldwide, Fortinet prioritizes innovation, scalability, and performance, thereby reinforcing its defenses against the constantly shifting landscape of cyber threats. In addition to its protective capabilities, Fortinet’s dedication to enabling digital transformation and ensuring business continuity highlights its essential role within the cybersecurity landscape, positioning itself as a trusted partner for organizations striving to navigate modern security challenges effectively. With a focus on proactive measures and cutting-edge solutions, Fortinet continues to adapt and evolve to meet the demands of an increasingly complex digital world.

The leading hybrid and multi-cloud platform provides an exceptional array of security features, including next-generation WAF, API Security, RASP, Enhanced Rate Limiting, Bot Defense, and DDoS protection, specifically designed to overcome the shortcomings of traditional WAF systems. Conventional WAF solutions were inadequate for the challenges posed by modern web applications that function across cloud, on-premise, or hybrid environments. Our state-of-the-art web application firewall (NGWAF) and runtime application self-protection (RASP) solutions not only bolster security measures but also ensure reliability and optimal performance, all while offering the most competitive total cost of ownership (TCO) in the industry. This forward-thinking strategy not only satisfies the requirements of the current digital environment but also equips organizations to tackle future web application security challenges effectively. By continuously evolving our solutions, we aim to provide businesses with the tools necessary to navigate an ever-changing security landscape.

Conventional packet filters are slowly losing relevance as the trend shifts towards Next-Generation Firewalls, even among open-source solutions. Among these, OPNsense emerges as a prominent choice, offering features such as intrusion detection, application management, web filtering, and antivirus protection. Every network, regardless of scale, faces threats; even devices in domestic settings, like smartwatches and washing machines, are vulnerable and require strong security protocols. Firewalls are essential components of a holistic security approach, providing protection against both traditional and novel threats. To ensure a firewall's effectiveness, it is crucial to have a thorough understanding of its features, make sure it is user-friendly, and position it strategically within the network. OPNsense meets these vital criteria through various functionalities, making it a formidable solution. This book is designed to be an essential resource for those interested in grasping, installing, and configuring an OPNsense firewall efficiently. By delving into the complexities of OPNsense, users can significantly enhance their digital security posture. Additionally, the insights provided will empower individuals to navigate the evolving landscape of cybersecurity with confidence.

Data represents the most crucial asset for any organization, making its protection paramount. Embracing a zero-trust philosophy is essential for network security, as it necessitates skepticism towards all users, whether they are external or internal. The landscape of network security is increasingly challenging due to the merging of network boundaries and the steady rise of numerous endpoints. Additionally, the sophistication of cyberattacks has escalated with the introduction of machine learning and automated methods. To safeguard their information in both hybrid cloud and on-premises settings, companies are transitioning towards cloud solutions that do not introduce extra costs or complexities. A significant advancement in achieving secure environments lies in the integration of micro-segmentation alongside real-time network governance. By selecting the appropriate software solutions, organizations can enhance their security posture through effective automation and data management. Furthermore, ditno is a cybersecurity management platform that provides a zero-trust network framework, facilitating enhanced security while streamlining processes. This approach not only fortifies defenses but also promotes a culture of vigilance within the organization.

An advanced load balancing solution designed for high performance ensures that your applications remain highly available, fast, and secure. This solution guarantees efficient and dependable application delivery across various data centers and cloud environments, effectively reducing latency and downtime while improving the experience for end users. It features a comprehensive full-proxy Layer 4 and Layer 7 load balancer, equipped with adaptable aFleX® scripting and personalized server health checks. Furthermore, it enhances application security through sophisticated SSL/TLS offloading, single sign-on (SSO), robust DDoS protection, and integrated Web Application Firewall (WAF) capabilities. With these features, businesses can confidently scale their operations while maintaining optimal performance and security for their applications.

Open-source software combined with a universal router plays a crucial role in making network access more equitable for all. VyOS aims to transform the way individuals connect to networks, empowering them to create the solutions they envision without facing constraints, limitations, or exorbitant costs. We assert that access to the internet is as vital for human progress as essential resources like food, water, air, and healthcare. Founded by engineers with a passion for innovation, VyOS stands as an open-source company dedicated to facilitating unrestricted network access without financial barriers. Our mission is realized through VyOS, leveraging our open-source software and virtual platforms to provide robust solutions. We offer features such as stateful firewalls, zone-based firewalls, and various types of NAT, including one-to-one, one-to-many, and many-to-many configurations. Moreover, our commitment extends to transparency, allowing users to engage in auditing, create customized images, and contribute to the development, with full access to the entire codebase and build toolchain available to all. This collaborative approach not only enhances security but also fosters a community of innovation and shared knowledge.

The expansion of businesses across various geographical areas has resulted in a significant surge in mobile data usage. This phenomenon is further amplified by the increasing diversity of device models and operating systems, which raises the risk of unsecured mobile wireless networks. As a result, enterprises are encountering escalating mobile data costs. Nevertheless, with CyberReef’s cutting-edge MobileWall cloud firewall service, organizations can reduce their overall data consumption by an impressive 50-70 percent due to its sophisticated bandwidth management capabilities. By leveraging any SIM-capable device, businesses can safeguard their cellular traffic through end-to-end encryption while effectively monitoring and regulating their data usage and expenses. MobileWall equips your organization with unparalleled security, transparency, and control over mobile data functions. In addition, it bolsters the security of mobile wireless connections and offers insightful analysis of corporate mobile data consumption trends. By automating the oversight of mobile data usage and costs, MobileWall enables companies to adeptly maneuver through the intricacies of mobile connectivity. This comprehensive solution empowers businesses to enjoy the benefits of mobile wireless technology without sacrificing security, ensuring that they can remain competitive in a rapidly evolving digital landscape. Ultimately, adopting MobileWall not only enhances operational efficiency but also fosters a more secure mobile environment for all users.

m0n0wall represents a dedicated effort to create an all-encompassing embedded firewall software that, when used with an embedded PC, offers a full range of essential functionalities commonly found in commercial firewall appliances, all while being user-friendly and available at no cost as free software. The initiative is built on a streamlined version of FreeBSD, integrating a web server, PHP, and various utilities, with the configuration for the entire system stored in a single XML text file to promote ease of understanding and simplicity. Remarkably, m0n0wall may be the first UNIX-based platform to utilize PHP for its boot-time configuration, departing from the conventional reliance on shell scripts, and it distinctly organizes all system settings in XML format, highlighting its innovative stance in firewall technology. This unique approach not only improves both the usability and management of the system but also signifies a notable progression in the field of open-source firewall solutions. Furthermore, m0n0wall stands as a testament to the capabilities of free software, demonstrating that robust security solutions can be accessible to all without the burden of financial constraints.

Recent developments in artificial intelligence have markedly diminished the frequency of zero-day attacks, improved security protocols for DevOps, and streamlined operations in data centers, all while facilitating enhanced scalability. The Quantum Firewall Software R82 stands out with its strong security capabilities and user-friendly interface for both Quantum on-premises and CloudGuard Network firewalls. By leveraging AI, it offers adaptive threat prevention features that effectively target both new and encrypted threats. With its dynamic tools designed for rapidly changing environments, R82 can automatically adjust to support business expansion and manage unexpected traffic spikes. It employs NIST-certified encryption to protect against the potential dangers introduced by quantum computing. Moreover, it uncovers hidden relationships and traffic patterns that aid in thwarting emerging malicious campaigns and preventing brand impersonation. R82 also improves website categorization, optimizing the efficacy of current security policies. This cutting-edge solution provides robust defenses against the most sophisticated phishing attacks, malware, and DNS threats, even within encrypted traffic, ensuring a well-rounded defense strategy. In essence, R82 equips organizations to confidently tackle the intricate challenges of contemporary cybersecurity landscapes while maintaining a proactive stance against evolving threats.

AP Lens serves as a Sandbox browser that enhances network security through DNS Whitelisting, effectively thwarting attacks before they infiltrate your systems. What advantages does AP Lens provide? Web Filtering: Offers a versatile and intuitive way to block unwanted content. Anti-Phishing: Eliminates the risk of similar-looking domains with complete accuracy. Ransomware Defense: Shields your network from cybercriminals while ensuring business applications remain unaffected. Secure Remote Work: Implements VPN technology to uphold internet usage policies. AP Lens Augmented Whitelist: A solution to eliminate 0-Day Attacks. Compliance: Adheres to the regulatory standards required by cybersecurity insurance policies. One-Click Installation: Eliminates the hassle of user setup or updates on their computers. No Maintenance: Prevents malware and phishing threats without the need for continuous oversight. With over two decades of collective expertise in cybersecurity, cloud security, and information protection, our team has successfully served various sectors, including both private and public domains, ensuring robust protection for all clients.

The AT&T premises-based firewall service offers a thorough managed network security solution that serves as the primary defense between a Local Area Network (LAN) and the broader Internet. This service includes all essential hardware and software components, along with configuration, installation, ongoing management, and maintenance, all backed by knowledgeable customer support and proactive network monitoring. A variety of premises-based firewall solutions are available to specifically address the unique needs of businesses, featuring products from well-known industry leaders like Fortinet®, Check Point®, Palo Alto Networks®, Cisco®, and Juniper Networks®. Users have the advantage of customizing their security policies, allowing for a tailored service that aligns with their organizational requirements. The offering ensures robust high-availability configurations, supports multi-gigabit throughput, and delivers comprehensive reporting features, providing a customized security experience for each organization. Moreover, this service is designed to adapt to the evolving business environment, thereby enhancing its effectiveness and relevance as technology and security challenges develop over time. Ultimately, this flexibility positions businesses to respond swiftly to emerging threats while maintaining a strong security posture.

Many owners of large networks still favor a 'private network' approach to meet their security requirements, as they seek to uphold data privacy, ensure data sovereignty, and achieve low latency in line with their business goals and compliance mandates. Despite this preference, innovation in on-premise firewalls has seen minimal progress, with developments mainly geared towards larger hardware solutions. Corsa Security has launched a groundbreaking turnkey solution for network security virtualization, aimed at assisting large enterprises and service providers in bolstering their threat protection capabilities while streamlining the firewall virtualization process, which leads to a significant reduction in total cost of ownership (TCO) by replacing physical firewalls with virtual ones. By integrating firewall virtualization with intelligent orchestration capabilities, the Corsa Security Orchestrator provides a comprehensive view of all virtual firewalls, effectively managing the health, capacity, and performance metrics of the infrastructure. This state-of-the-art solution not only revitalizes network security but also enhances operational efficiency for its users, enabling them to respond more adeptly to evolving security challenges in today’s digital landscape. Furthermore, the ability to adapt and scale these virtual firewalls ensures that organizations can maintain robust security measures without the constraints of traditional hardware limitations.

Map and analyze the integration of business applications within the cloud ecosystem while adopting a proactive stance to assess security vulnerabilities related to business functions. Implement a fully automated and seamless approach for updating network security protocols, enhancing efficiency and responsiveness. Establish a direct correlation between cyber incidents and specific business processes, thereby improving situational awareness and response capabilities. Effortlessly identify and map secure network connections for business applications, ensuring robust and reliable access. Manage both on-premises firewalls and cloud security settings through a centralized platform for streamlined oversight. Enhance the workflow for modifying security policies, which includes planning, risk assessment, implementation, and validation, to make it more efficient. Conduct regular assessments of any changes made to security policies to reduce risks, avoid service disruptions, and ensure compliance with regulations. Generate audit-ready reports automatically, effectively reducing preparation time and costs by up to 80%. Fine-tune firewall rules to minimize risks without hindering business operations, thereby promoting a secure and effective network environment. Furthermore, ongoing monitoring and refinement of these security measures can strengthen the organization’s resilience against the ever-evolving landscape of cyber threats, ensuring a proactive defense strategy. Adapting to these changes will ultimately enhance the organization's overall security posture and operational efficiency.