Best Network Security Software for Linux

Control D is a customizable DNS filtering and traffic redirection platform that leverages Secure DNS protocols like DNS-over-HTTPS, DNS-over-TLS and DNS-over-QUIC, with support for Legacy DNS. - Block malicious threats - Block unwanted types of content network wide (ads & trackers, IoT telemetry, adult content, socials, and more) - Deploy in minutes on fleets of devices using RMM - Manage clients using sub-organizations - Gain visibility on network events and usage patterns, with client level granularity - Re-route traffic via proxies (through DNS) for improved privacy and security - Enjoy superior UX and simplicity Think of it as your personal Authoritative DNS resolver for the entire Internet that gives you granular control over what domains get resolved, redirected or blocked.

Unimus is an on-premise Network Automation and Configuration Management (NCM) solution designed for fast deployment and ease of use. It improves network security by providing centralized visibility into configurations and alerting you to unauthorized changes with real-time notifications. Its full-featured API integrates with SIEM tools to boost visibility and support security operations. Compliance Reporting ensures configurations meet internal security policies and audit requirements. The Mass Config Push tool enables scheduled firmware upgrades, letting you patch vulnerabilities across the network without manual updates. Supporting 400+ device types from 150+ vendors, Unimus offers Network Automation, Change Management, and Config Auditing in a vendor-agnostic platform. It eliminates manual errors, strengthens security, and speeds up operations — all without requiring programming skills.

Firewall Analyzer helps manage and optimize firewall policies, automates firewall rule administration, tracks configuration, rule changes, helps schedule configuration backup, executes regular compliance audit checks, performs periodic security audits, generates real-time alerts for security events, tracks VPN usage, generates VPN reports, displays the current security status of firewalls, tracks employee internet usage, monitors to generate live, historical bandwidth reports, alerts when bandwidth is exceeded, collects, consolidates, and analyzes firewall logs to generate security, bandwidth reports.

Secure instant messaging system with own server that can work in local area network and over the Internet. Providing collaboration tools for employee engagement. Built-in knowledge base, important notifications with return receipts, Bulletin board, broadcast messages, flexible server management, the system for user rights to access MyChat features, voice/video calls, screen sharing calls, Kanban project management, conferences, private dialogues, extended contact list, available for all platforms: Windows, macOS, Linux, Android, iOS, WEB.

CacheGuard-OS transforms a virtual or bare metal machine into a powerful and easy to handle network appliance. It's a Linux based Operating System built from scratch and especially designed to Secure and Optimize the network traffic. Great care has been taken by CacheGuard-OS developers to select the best of the best Open Source technologies to integrate into CacheGuard-OS. The result is a robust and trustworthy solution that can be up and running within minutes. CacheGuard-OS integrates Open Source software such as but not limited to OpenSSL, NetFilter, IProute2, StrongSwan, ClamAV, Apache, ModSecurity, Squid and Open Source developments made by CacheGuard-OS developers.

GoodAccess is a cybersecurity platform (SASE/SSE) that empowers medium-sized enterprises to easily implement Zero Trust Architecture (ZTA) in their infrastructure, regardless of its complexity or scale. By leveraging a Low-Code/No-Code approach, GoodAccess delivers a hardware-free, rapid deployment solution within hours or days, allowing companies to enhance their security without the need for in-house IT experts. Our platform ensures seamless integration with modern SaaS/cloud applications as well as legacy systems, protecting critical assets for remote and hybrid workforces. GoodAccess serves businesses with 50-5000 employees across diverse industries, particularly those adopting multi-cloud and SaaS environments. Start your 14-day full-featured free trial.

At SafeDNS, we are committed to creating a safer and more secure online environment for SMBs, enterprises, ISPs, MSPs, OEMs, and Education. We have a global footprint, making the internet safer for millions of users in over 60 countries. With years of experience in the field of cybersecurity and DNS filtering, we offer cutting-edge solutions to safeguard your digital life. At present, SafeDNS serves more than 4000 businesses and institutions, and tens of thousands of home users worldwide. We do: -Web content filtering. We help you block all dangerous or unwanted websites such as pornography, violence, child sexual abuse and similar categories. -Malware protection. We also have your back against malicious sites trying to breach user devices either with viruses or information theft intent. -Cloud service. Additionally, we provide you with a cloud filtering service that requires no additional hardware purchase or software installation.

NetBird is an open-source Zero Trust Networking platform built by engineers for engineers. It radically simplifies deploying secure private networks using the high-performance WireGuard® protocol. Unlike traditional VPNs, NetBird creates decentralized, low-latency, high-throughput private networks with a single management console for identity-based access control. Integrating seamlessly with your IdP for SSO and MFA, it forms direct, encrypted peer-to-peer tunnels between devices, servers, and clouds - no central bottlenecks or single points of failure. Lightweight clients ensure scalability and privacy, with traffic never passing through management services. NetBird supports integrations with CrowdStrike, Intune, SentinelOne, pfSense, and more. Ideal for Zero Trust remote access, multi-cloud connectivity, dynamic posture checks, detailed auditing, and MSP multi-tenant management - all through one intuitive platform.

Choose us because we offer the easiest to use technology without sacrificing features or performance. We back this up with outstanding support and care, delivered under a fair and cost effective pricing model Our technology is used by the smallest startups with big ideas and small budgets all the way to global enterprises and anything in between. We love them all the same! Easy to use Load balancing, WAF, GSLB and SSO/Pre-Authentication. It is also the Only true ADP Application Delivery Platform where the functionality and lifespan can be enhanced using the app store or applications that you develop in house.

Enginsight is an all-in-one cybersecurity platform made in Germany, combining threat detection and defense capabilities. The features are: Automated security checks, pentesting, IDS/IPS, micro segmentation, vulnerability scans, and risk assessments. It empowers businesses of all sizes to effortlessly implement and monitor robust security strategies through an intuitive interface. Scan your systems automatically and immediately recognize the security status of your IT infrastructure. 100% self-developed (security by design) and has no dependencies on third-party tools. Permanently scan your IT environment for existing devices and create a live image of your IT infrastructure. Automatic detection and unlimited IP inventory of all network devices, as well as their classification. Enginsight provides a comprehensive solution for monitoring and securing your Windows servers, Linux servers and end devices such as Windows PCs or Linux . Start your 15 day free trial now.

Sectrio was launched as Subex Secure in the year 2016 to meet the growing needs of businesses in securing their Internet of Things and Operational Technology footprint on a single platform. To meet this objective, Subex invested in building the world’s largest adaptable honeypot network ground-up while simultaneously building an agile product with features aligned to the needs of our growing customer base. Subex Secure was rebranded as Sectrio in September 2021 to reflect the arrival of the next phase of our product and innovation evolution. Today, Sectrio has deployments across North America, the Middle East, APAC, and Indian markets. Our customer base is spread across verticals. Sectrio also is home to the largest number of cybersecurity domain specialists including the industry’s leading threat research team.

Armis Centrix™ is a comprehensive cyber exposure management platform that provides continuous, real-time visibility and protection across IT, OT, IoT, and IoMT environments. Powered by the Armis AI-driven Asset Intelligence Engine, it identifies every connected device, assesses cyber risk, and monitors vulnerabilities across an organization’s entire digital attack surface. The platform automates risk scoring, streamlines compliance reporting, and supports rapid incident response through deep asset intelligence. With capabilities that span asset management, OT/IoT security, medical device protection, and early warning threat detection, Armis Centrix™ enhances operational resilience for modern enterprises. VIPR Pro adds advanced prioritization and remediation to connect findings directly to actionable fixes. Designed as a cloud-native, frictionless platform, Armis Centrix™ empowers organizations to reduce exposure, strengthen security posture, and maintain continuity at scale.

Trustgrid is the SD-WAN for application providers. The Trustgrid platform uniquely addresses the needs of SaaS application providers who rely on remote systems. By combining an SD-WAN 2.0, edge computing, and zero trust remote access into a single platform we allow software providers to manage and support distributed application environments from the cloud to the edge. With the Trustgrid platform you can: • Build cloud to on-premise networks at scale • Manage and support 100s of networks from a single pane of glass • Control on-premise apps and appliances as if they were in the cloud • Run and support Docker containers in any cloud or on-premise • Provide your support teams secure access to edge application environments Simplify connectivity, enhance security, and guarantee network availability with Trustgrid.