List of the Top 25 Network Security Software for Linux in 2025

Control D is a versatile DNS filtering and traffic redirection service that utilizes advanced Secure DNS protocols such as DNS-over-HTTPS, DNS-over-TLS, and DNS-over-QUIC, while also accommodating traditional DNS. With Control D, users can effectively eliminate harmful threats, restrict various types of undesirable content across the network—including advertisements, trackers, IoT data, adult material, social media, and more—while also redirecting traffic through transparent proxies and monitoring network activities and usage patterns at a client-specific level. Consider it your own personalized Authoritative DNS resolver for the entire Internet, providing you with detailed control over which domains are allowed to be resolved, redirected, or blocked. This capability not only enhances security but also empowers users to tailor their online experience according to their preferences.

Unimus is a comprehensive on-premise solution for Network Automation and Configuration Management (NCM) that prioritizes quick installation and user-friendliness. This platform enhances network security by offering a unified view of configurations and providing real-time alerts for unauthorized changes. Its robust API allows seamless integration with SIEM systems, enhancing overall visibility and supporting security operations. With Compliance Reporting features, Unimus ensures that configurations align with internal security standards and audit requirements. The Mass Config Push functionality facilitates scheduled firmware updates, enabling you to address vulnerabilities throughout your network efficiently, without the need for manual intervention. Supporting over 400 device types from more than 150 different manufacturers, Unimus serves as a vendor-agnostic platform for Network Automation, Change Management, and Configuration Auditing. It minimizes the risk of human errors, bolsters security, and accelerates operational processes, all while being accessible to users without programming expertise.

Strengthen your organization's security posture and simplify compliance with major regulatory standards like ISO 27001, GDPR, and HIPAA using Proton's software-based VPN solution. Designed for easy and seamless integration with your existing infrastructure, Proton VPN for Business provides a flexible and scalable way to protect your organization. All our plans use strong encryption algorithms such AES-256 or ChaCha20 to keep your data secure in transit. You can further enhance your company's endpoint security with enforced two-factor authentication (2FA) and effortless single sign-on (SSO) user access. And with full support for SCIM, you can seamlessly automate provisioning and user management across your organization. With the Proton VPN Professional plan, you can assign dedicated VPN servers and Gateways (logical groupings of dedicated servers), and segment access based on each individual's role or department to ensure employees only connect to the resources they need. This approach enhances both security and operational efficiency across distributed teams and hybrid environments. Proton VPN is part of a suite of open source end-to-end encrypted tools created by the team behind Proton Mail. Backed by a large global server network, our platform delivers high-speed (up to 10 Gbps) connections and trustworthy privacy protection, making it ideal for businesses of all sizes that prioritize data security and compliance.

SpamTitan's email security solution safeguards businesses, educational institutions, small to medium-sized enterprises (SMBs), and managed service providers (MSPs) from various email threats including spam. It effectively defends against phishing attempts, zero-day vulnerabilities, viruses, malware, ransomware, and other malicious email activities, ensuring a secure mail flow and filtering out unwanted messages. Our user-friendly yet robust email protection is compatible with Office365, making it accessible for a wide range of users. You can try SpamTitan Email Security risk-free with a fully supported trial. SpamTitan – Comprehensive features included: * Protection against CEO impersonation * Safeguarding against spear phishing attacks * Analysis of links within emails * Complete email sanitization * Defense against zero-day attacks * Mail spooling capabilities * Anti-spoofing measures * Protection against ransomware and malware * Checking for SPF, DKIM, and DMARC compliance * Encryption options available * Fully multi-tenant architecture * Customizable user interface for branding * Complete REST API access * Detailed setup documentation and support Recognized as a top solution in the G2 Crowd Email Security category, SpamTitan Email Security stands out for its premium functionalities and reliability. Begin your free trial today and enhance your email security!

NinjaOne enhances network security by implementing monitoring, patching, and enforcing policies. Alerts are generated when unauthorized devices or applications are detected, prompting IT teams to investigate. Automated patching minimizes the risks associated with vulnerable systems. Comprehensive reporting features provide insights into security trends and areas needing compliance improvement. Remote access solutions utilize robust encryption to safeguard data. Additionally, backup integration strengthens defenses against cyber threats. Overall, NinjaOne empowers organizations to uphold a robust network security framework.

ManageEngine OpManager serves as a network security monitoring tool that offers immediate identification of network irregularities and possible security risks. It oversees device configurations, observes unauthorized modifications, and guarantees adherence to security protocols. By delivering proactive notifications, OpManager aids in recognizing unusual traffic patterns, identifying potential vulnerabilities, and addressing performance concerns, allowing for swift action to reduce risks. Additionally, it connects seamlessly with firewall and intrusion detection systems, bolstering network security by providing insights into possible attacks and security breaches.

Delska operates as a specialized data center and network service provider, delivering customized IT and networking solutions for enterprises. With a total of five data centers in Latvia and Lithuania—one of which is set to open in 2025—and additional points of presence in Germany, the Netherlands, and Sweden, we create a robust regional ecosystem for data centers and networking. Our commitment to sustainability is reflected in our goal to reach net-zero CO2 emissions by 2030, establishing a benchmark for eco-friendly IT infrastructure in the Baltic region. Beyond traditional services like cloud computing, colocation, and data security, we also introduced the myDelska self-service cloud platform, designed for rapid deployment of virtual machines and management of IT resources, with bare metal services expected soon. Our platform boasts several essential features, including unlimited traffic and fixed monthly pricing, API integration, customizable firewall settings, comprehensive backup solutions, real-time network topology visualization, and a latency measurement map, supporting various operating systems such as Alpine Linux, Ubuntu, Debian, Windows OS, and openSUSE. In June 2024, Delska expanded its portfolio by merging with two companies—DEAC European Data Center and Data Logistics Center (DLC)—which continue to function as separate legal entities under the ownership of Quaero European Infrastructure Fund II. This strategic merger enhances our capacity to provide even more innovative services and solutions to our clients.

Manage Engine's EventLog Analyzer stands out as the most cost-effective security information and event management (SIEM) software in the market. This secure, cloud-based platform encompasses vital SIEM functionalities such as log analysis, log consolidation, user activity surveillance, and file integrity monitoring. Additional features include event correlation, forensic analysis of logs, and retention of log data. With its robust capabilities, real-time alerts can be generated, enhancing security response. By utilizing Manage Engine's EventLog Analyzer, users can effectively thwart data breaches, uncover the underlying causes of security challenges, and counteract complex cyber threats while ensuring compliance and maintaining a secure operational environment.

UTunnel Secure Access offers solutions including Cloud VPN, ZTNA, and Mesh Networking to facilitate secure remote connections and reliable network performance. ACCESS GATEWAY: Our Cloud VPN as a Service allows for the rapid deployment of VPN servers on either Cloud or On-Premise setups. By employing OpenVPN and IPSec protocols, it ensures secure remote connections complemented by policy-driven access controls, enabling businesses to establish a robust VPN network effortlessly. ONE-CLICK ACCESS: The Zero Trust Application Access (ZTAA) feature revolutionizes secure interaction with internal business applications such as HTTP, HTTPS, SSH, and RDP. Users can conveniently access these services via their web browsers without the necessity of any client-side applications. MESHCONNECT: This solution, combining Zero Trust Network Access (ZTNA) and mesh networking, offers detailed access controls tailored to specific business network resources and fosters the formation of secure, interconnected business networks for enhanced collaboration. SITE-TO-SITE VPN: Additionally, the Access Gateway allows for the establishment of secure IPSec Site-to-Site tunnels, which facilitate connections between UTunnel's VPN servers and other network infrastructure components like gateways, firewalls, routers, and unified threat management (UTM) systems, thereby enhancing overall network security. By integrating these features, UTunnel Secure Access is committed to providing comprehensive solutions that meet the evolving needs of modern businesses.

Firewall Analyzer is a comprehensive tool designed for effective management of firewalls, automating the administration of firewall rules. It monitors both configuration and rule modifications, allows for the scheduling of configuration backups, and aids in the oversight of firewall policies. Additionally, it conducts regular security audits, issues alerts for any security-related incidents, and keeps tabs on VPN utilization while providing detailed VPN reports alongside the current security posture of firewalls. The tool also tracks employee internet activity to produce real-time and historical bandwidth reports, sending alerts when bandwidth thresholds are surpassed. Furthermore, it collects, consolidates, and scrutinizes firewall logs to generate insightful reports on security and bandwidth usage, ensuring that administrators have all the necessary information to maintain robust network security. This multifaceted functionality makes Firewall Analyzer an essential asset for organizations aiming to enhance their cybersecurity measures.

Imunify360 offers comprehensive security solutions tailored for web-hosting servers. Beyond merely functioning as antivirus software and a web application firewall, Imunify360 integrates an Intrusion Prevention and Detection system along with a specialized web application firewall, real-time antivirus protection, and patch management features into a cohesive security package. This innovative suite is designed to be fully automated, providing users with an intuitive dashboard that presents all relevant statistics clearly. In addition, Imunify360 continuously updates its protective measures to adapt to emerging threats, ensuring that web-hosting environments remain secure at all times.

A reliable instant messaging platform designed for both local networks and the Internet, facilitating secure communication. Additionally, it includes collaborative tools aimed at enhancing employee interaction and engagement within the workplace.

NetFlow Analyzer offers immediate insights into network bandwidth performance by utilizing flow technologies effectively. This tool delivers an in-depth perspective on your network's bandwidth consumption and traffic behaviors. It has successfully optimized countless networks around the globe. Serving as a unified solution, NetFlow Analyzer examines, reports, and gathers information regarding your network's bandwidth consumption. With the capability to enhance bandwidth management across over a million interfaces globally, it also includes features for network forensics and traffic analysis. By adjusting policies through traffic shaping with ACLs and class-based rules, you can exercise control over the most frequently used applications. Furthermore, NetFlow Analyzer employs Cisco NBAR technology to provide an intricate understanding of Layer 7 traffic. It is also proficient in detecting applications that utilize dynamic port numbers or conceal themselves behind commonly used ports, ensuring comprehensive network management. Ultimately, this tool is essential for maintaining optimal network performance and security.

The CacheGuard product range revolves around a foundational offering known as CacheGuard-OS. When installed on either a physical or virtual machine, CacheGuard-OS effectively converts that system into a robust network appliance. This newly formed appliance can serve multiple functions as various types of gateways that enhance the security and efficiency of your network. Below is a concise overview of the various CacheGuard appliances available. - Web Gateway: exercise control over organizational web traffic and filter out undesirable web access. - UTM (Unified Threat Management): protect your networks from a wide array of online threats using a combination of a firewall, antivirus at the gateway, VPN server, and a filtering proxy. - WAF (Web Application Firewall): prevent harmful requests from reaching your essential web applications and safeguard your enterprise. The WAF incorporates OWASP rules while allowing for the creation of custom rules, along with an IP reputation filtering system that enables the blocking of IPs identified in real-time blacklists. - WAN Optimizer: optimize the flow of your vital network traffic, conserve bandwidth, and ensure high availability for your internet connection through the use of multiple ISPs. Each appliance is designed to address specific network challenges, ultimately providing comprehensive solutions tailored to your organization’s needs.

Perimeter 81 is transforming the landscape of network security with its innovative SaaS solution that delivers tailored networking and top-tier cloud protection. By streamlining secure access to networks, clouds, and applications for today's distributed workforce, Perimeter 81 empowers businesses of all sizes to operate securely and confidently within the cloud. Unlike traditional hardware firewalls and VPNs, Perimeter 81 offers a cloud-based, user-focused Secure Network as a Service that utilizes Zero Trust and Software Defined Perimeter security frameworks. This modern approach not only enhances network visibility but also ensures effortless integration with leading cloud providers and facilitates smooth onboarding for users. The result is a comprehensive security solution that adapts to the needs of contemporary organizations while promoting a more agile and secure working environment.

GoodAccess is a cybersecurity solution focused on SASE/SSE, aimed at assisting mid-sized companies in effortlessly adopting Zero Trust Architecture (ZTA), no matter the intricacy or scale of their IT systems. Utilizing a Low-Code/No-Code methodology, GoodAccess allows for rapid, hardware-free implementations that can be completed within hours or days, thereby removing the necessity for extensive internal IT skills. The platform provides smooth integration with both contemporary cloud applications and older systems, ensuring the protection of vital resources for teams working remotely or in hybrid settings. Targeting organizations with employee counts ranging from 50 to 5000 across diverse sectors, GoodAccess is particularly ideal for those leveraging multi-cloud and SaaS frameworks, enhancing their overall security posture significantly. Additionally, this solution empowers companies to stay agile and secure in an increasingly digital landscape, fostering a robust defense against emerging cyber threats.

SafeDNS is dedicated to fostering a more secure and protected internet space for small to medium-sized businesses, large corporations, internet service providers, managed service providers, original equipment manufacturers, and educational institutions. Our reach spans across the globe, enhancing online safety for millions of individuals across more than 60 nations. With extensive expertise in cybersecurity and DNS filtering, we provide state-of-the-art solutions that ensure your online safety. Our advanced technologies are designed to shield you from threats such as malware, phishing scams, and unsuitable content, among other risks. Currently, SafeDNS supports over 4,000 organizations and individual users worldwide, demonstrating our commitment to a safer digital landscape for all. As we continue to innovate, our goal is to expand our services and enhance protection for even more users in the future.

Datadog serves as a comprehensive monitoring, security, and analytics platform tailored for developers, IT operations, security professionals, and business stakeholders in the cloud era. Our Software as a Service (SaaS) solution merges infrastructure monitoring, application performance tracking, and log management to deliver a cohesive and immediate view of our clients' entire technology environments. Organizations across various sectors and sizes leverage Datadog to facilitate digital transformation, streamline cloud migration, enhance collaboration among development, operations, and security teams, and expedite application deployment. Additionally, the platform significantly reduces problem resolution times, secures both applications and infrastructure, and provides insights into user behavior to effectively monitor essential business metrics. Ultimately, Datadog empowers businesses to thrive in an increasingly digital landscape.

N-able N-sight RMM, a cloud-based IT platform, empowers Managed Service Providers (MSPs) to deliver essential technology services in mere hours instead of taking weeks or even months. With intuitive graphical dashboards that emphasize alerts, you can focus on what truly matters for your operations. Built-in remote access and security functionalities ensure that you can effectively support and safeguard your business right from the start. Additionally, you have the option to incorporate extra security measures and add-on services whenever you're ready to enhance your offerings. Among its features, N-able RMM includes remote access, network path visualization, and automated monitoring and upkeep. Furthermore, N-able N-sight RMM is available for download as mobile applications on both Android and iOS, enabling users to address issues from virtually any location. This flexibility allows for seamless management of IT challenges, enhancing operational efficiency.

NextDNS provides extensive protection against a variety of security threats by efficiently blocking ads and trackers on websites and apps, all while ensuring a safe and monitored internet experience for children across all devices and networks. You have the ability to evaluate your security requirements and personalize your protection by enabling more than ten distinct safety features. By integrating trustworthy threat intelligence feeds that encompass millions of malicious domains and are continually updated, you can significantly fortify your defense strategies. Our system surpasses conventional tracking methods by analyzing DNS queries and responses in real time, which facilitates the rapid detection and prevention of harmful activities. Since there is often a narrow timeframe of just hours between the registration of a domain and its potential use in an attack, our sophisticated threat intelligence framework is specifically designed to identify harmful domains more effectively than conventional security measures. Furthermore, by utilizing the most popular ad and tracker blocklists that feature millions of constantly updated domains, you can successfully eliminate ads and trackers from both websites and applications, including the most advanced ones. In summary, NextDNS equips users with the necessary tools to create a customized and safer browsing environment that meets their individual security needs, thereby enhancing overall online experience.

More than 15,000 companies around the globe rely on OpenVPN's Access Server for a self-hosted VPN solution that securely connects their remote workforce to the company's private network via the internet. This ensures that employees working remotely or in hybrid setups can easily and securely access essential business resources without overwhelming you with extensive setup and maintenance tasks. OpenVPN Access Server provides a comprehensive SSL self-hosted VPN software solution, combining robust OpenVPN server functionalities with enterprise management features, a user-friendly OpenVPN Connect interface, and client software packages that are compatible with Windows, macOS, Linux, and mobile operating systems like Android and iOS. Furthermore, OpenVPN Access Server allows for a variety of configurations, enabling secure and precise remote access to internal networks and private cloud resources, all while offering meticulous access control measures for enhanced security. Additionally, its flexibility and scalability make it an ideal choice for businesses of all sizes looking to maintain high security while managing remote access effectively.

GOOSE VPN stands out as a premier VPN provider in Europe, committed to enhancing your online experience! With our assistance, you can explore the internet securely and freely, while ensuring that your digital footprints remain confidential. Take advantage of incredible promotions, evaluate worldwide rates, and grab local discounts! A Virtual Private Network, or VPN, acts as a secure conduit for your data between your device and the web. When you connect to a GOOSE VPN server, your online activities are transmitted through an encrypted tunnel, safeguarding your information from prying eyes, including hackers, government agencies, and internet service providers. This capability allows you to browse the internet without revealing your identity, select your desired virtual location, bypass geographic limitations, avoid censorship, and get rid of annoying advertisements. With GOOSE VPN, you not only regain your online liberty but also enhance the security of your web surfing, creating a more enjoyable and private digital environment. Experience the internet like never before, knowing you have the tools to protect your privacy at your fingertips.

Through collaboration, we can robustly address cyber threats at every point within an organization, regardless of where the threats arise. Cybereason provides unmatched visibility and accurate detection of both known and unknown dangers, enabling security teams to leverage true preventive measures. The platform delivers extensive context and insights from the entire network, allowing defenders to evolve into proficient threat hunters capable of uncovering hidden attacks. With just a single click, Cybereason significantly reduces the time required for defenders to investigate and remedy incidents, utilizing both automation and guided assistance. By analyzing an impressive 80 million events every second, Cybereason functions at a scale that is 100 times larger than many of its competitors, which leads to a remarkable decrease in investigation duration by up to 93%. This swift capability empowers defenders to tackle new threats in just minutes rather than days, transforming how organizations respond to cyber challenges. Ultimately, Cybereason sets a new benchmark for threat detection and response, fostering a more secure digital environment for everyone involved. Moreover, this innovative approach not only enhances the efficiency of security operations but also promotes a proactive stance in the ever-evolving landscape of cyber threats.

SaltStack serves as an advanced IT automation platform capable of managing, securing, and enhancing infrastructure across various environments, whether on-premises, in the cloud, or at the edge. It operates on an event-driven automation engine that intelligently identifies and reacts to system changes, which proves invaluable in handling intricate settings. This robust framework is especially useful in addressing the complexities of modern IT landscapes. The latest addition to SaltStack's offerings is its SecOps suite, designed to identify security vulnerabilities and misconfigurations within systems. With this advanced automation, issues can be promptly detected and rectified, ensuring that your infrastructure remains secure, compliant, and continuously updated. Within the SecOps suite, the components Comply and Protect play crucial roles. Comply is responsible for checking compliance against standards such as CIS, DISA, STIG, NIST, and PCI. Additionally, it assesses operating systems for vulnerabilities and facilitates the updating of patches to bolster security measures effectively. This comprehensive approach not only enhances security but also simplifies the management of compliance requirements.

Around the globe, small and medium-sized enterprises (SMEs) can achieve unparalleled freedom of choice by collaborating with JumpCloud. By utilizing its cloud-based open directory platform, JumpCloud streamlines the management and security of identities, access, and devices, allowing IT teams and managed service providers (MSPs) to efficiently support a variety of operating systems including Windows, Mac, Linux, and Android. This innovative solution enables users to manage identities either directly or through their chosen HRIS or productivity tools, while also granting access to numerous on-premises and cloud applications with a single, secure set of credentials. To explore the full potential of this comprehensive platform, consider starting a free 30-day trial of JumpCloud today and experience the benefits firsthand. Embrace the future of IT management and watch your business thrive.