Best Free Network Security Software - Page 2
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Compare the Top Free Network Security Software as of April 2026 - Page 2
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1
Nagios Network Analzyer
Nagios Enterprises
Network Analyzer provides an in-depth look at all network traffic sources and potential security threats allowing system admins to quickly gather high-level information regarding the health of the network as well as highly granular data for complete and thorough network analysis. Network Analyzer provides a central view of your network traffic and bandwidth data as well as potential network compromises. The powerful home dashboard provides an at-a-glance view of critical netflow or sflow data sources, server system metrics, and abnormal network behavior for quick assessment of network health. Users can easily drill down to see specific information on individual IPs, source port, destination port, or any combination thereof. Network Analyzer’s advanced alerting and reporting capabilities provide IT staff with superior awareness of their network. Highly granular, down-to-the-packet data can be accessed and archived for further tracking and analysis.Starting Price: $1995.00 -
2
NTFS Permissions Auditor
Albus Bit
NTFS permissions are used to manage access to the files and folders in NTFS file systems. NTFS Permissions Auditor allows you to quickly analyze, verify and review any NTFS folder permissions. Our free version provides you with deep and detailed audit results while the Pro version offers additional features such as powerful, customizable filtering, exports to various formats, and more. Select or import directories you want to audit, or search for other shares and add them to the audit settings. Configure additional audit settings if required or simply leave the default settings on. Press ‘Audit’ and wait for all folders and their NTFS permissions to be scanned. When the audit results are ready, you can view or export them to a file. Get up and running with just one installation – no other configuration is needed. The filters incorporate lots of factors – use ‘And’ and ‘Or’ to manage them and get the information you need.Starting Price: $199 one-time payment -
3
Xeams
Synametrics Technologies
Xeams is, a secure and powerful complete mail server for Windows, Linux, Solaris, MacOSX and other flavors of UNIX. Xeams supports SMTP, POP3, and IMAP. It features a powerful spam filtering engine that eliminates up to 99% of junk email upon installation. The software offers a flexible approach to email, making it a very user-friendly server. Xeams can block 99% percent of all junk messages right out of the box. The filtering rules are fully customizable and get better as Xeams adapts to your email environment. IMAP and POP3 servers built right into the system to easily fetch emails from an email repository to a client's machine. Xeams can be used as an email firewall in front of another server, such as MS Exchange, or as a full email server requiring no other software to process emails. Use Xeams in front of your Office 365 infrastructure to gain additional filtering, reporting and archiving capabilities that you don't get with Office 365 alone.Starting Price: $20.00/year/user -
4
Fluxguard
Fox and Geese
Fluxguard provides cloud-based website change monitoring. Locate errors, defacement, or other business-critical website changes, even on complex web apps or multi-page, multi-step sequences. Filter irrelevant changes. Create simple rules to alert business users and IT staff to web page changes that require investigation. Or delegate the analysis to one of our Solution Architects who will pre-screen results, optimize monitoring, and customize a change report. We utilize Natural Language Processing to simplify monitoring. This allows variation detection of a document’s extracted features, such as people, products, organizations, and so on. These insights can be leveraged to surface compelling dashboards and unique interrelationship analyses. Change summaries will be dispatched at once for staff remediation, analysis, or investigation. Receive detailed reports as soon as changes are detected.Starting Price: $25.00/month -
5
SOC Prime Platform
SOC Prime
SOC Prime operates the world’s largest and most advanced platform for collective cyber defense that cultivates collaboration from a global cybersecurity community and curates the most up-to-date Sigma rules compatible with over 28 SIEM, EDR, and XDR platforms. SOC Prime’s innovation, backed by the vendor-agnostic and zero-trust cybersecurity approach, and cutting-edge technology leveraging Sigma language and MITRE ATT&CK® as core pillars are recognized by the independent research companies, credited by the leading SIEM, XDR & MDR vendors, and trusted by 8,000+ organizations from 155 countries, including 42% of Fortune 100, 21% of Forbes Global 2000, 90+ public sector institutions, and 300+ MSSP and MDR providers. Driven by its advanced cybersecurity solutions, Threat Detection Marketplace, Uncoder AI, and Attack Detective, SOC Prime enables organizations to risk-optimize their cybersecurity posture while improving the ROI of their SOC investments. -
6
Simply5 CloudLAN
Simply5
CloudLAN is a secure virtual office for a distributed teams. CloudLAN helps bring all the user computers into a single virtual network & accessible to each other through private IP's from anywhere. TeamVPN IP gives a roaming Static IP that is no longer tied to a physical locations internet connection. Addon features like service casting & Host connect makes remote work accessible to even companies without inhouse technical team.Starting Price: $19 -
7
Metiix Blockade
Metiix
Block malware, tracking, & ads on every device in your network. Choose a single device, a group, or your entire network. Simple software deployment and configuration. Custom blocklist & exceptions. Blockade is DNS-based server software designed to block third-party tracking software, analytical software, ads and access to sites known to carry malware for all computers and devices on your network that can browse the internet. A single server software license is all that is needed to protect all of the devices (computers, servers, laptops, Chromebooks, handhelds, smart TVs, tablets, phones) connected on your network and across your WI-FI from internet tracking software and ads. Load Blockade directly onto any Windows or Linux computer on your network not currently running DNS services or web services. Blockade keeps advertisements, tracking, and analytical software off of your network.Starting Price: Free -
8
Twingate
Twingate
The way we work has changed. People now work from anywhere, not just from an office. Applications are based in the cloud, not just on-premise. And the company network perimeter is now spread across the internet. Using a traditional, network-centric VPN for remote access is not only outdated and difficult to maintain, but exposes businesses to security breaches. VPN infrastructure is costly and time-consuming to procure, deploy, and maintain. Inability to secure access at the app level means hacks can expose whole networks. Twingate enables organizations to rapidly implement a modern Zero Trust network that is more secure and maintainable than VPNs. Delivered as a cloud-based service, Twingate empowers IT teams to easily configure a software-defined perimeter without changing infrastructure, and centrally manage user access to internal apps, whether they are on-prem or in the cloud.Starting Price: $10 per user per month -
9
DuskRise
DuskRise
Connected to the home Wi-Fi router, this IoT device creates a new secure network where potential threats are deterred with lightning-fast speed. Essential for the device set up process, the app also delivers security notifications and insights to raise the cyber-literacy of the end-user. The security dashboard provides complete visibility of the offsite networks and allows to enforce office-grade policy controls in the remote environment. The DuskRise solution is powered by the threat intelligence research and data analysis form the Cluster25 team. Mitigate threats through effective control and prevention filters with strong detection and response mechanics. Leverage on our proprietary AI algorithms to filter noisy network data and detect anomalous behavior on the spot. Form a secure network enclave, creating a segment you can own and secure on any network.Starting Price: Free -
10
enforza
enforza
The cost-effective alternative to AWS Network Firewall, Azure Firewall, and cloud-native NAT Gateways. Same features. Less cost. No data processing charges. enforza is a cloud-managed firewall platform that helps you build a unified multi-cloud perimeter with powerful firewall, egress filtering and NAT Gateway capabilities. With easy cloud management at its core, enforza is truly multi-cloud, enabling you to apply consistent security policies across multiple clouds and regions. - Install the agent on *your* linux instance (cloud or on-prem) with one command. - Claim your device on the portal. - Manage your policies.Starting Price: $39/month/gateway -
11
CloudFish
CloudFish
Cloud-Fish protects your sensitive data across all platforms and provides your business with a solid defense against cyber-attacks and data breaches. Your sensitive business information, intellectual property assets, and customer data are stored on your employees’ computers, mobile devices, and on external cloud servers that your company uses. Securing this sensitive information is critical to protecting your business from financial risks, regulatory violations, and reputation setbacks. How do you ensure the security of your sensitive data that is dispersed across different platforms? Your company has regional as well as global offshore offices. You have little visibility and control over what is going on in your offshore organization. Who is sharing what information? You need an ability to monitor and an effective mechanism to respond if a cyber-attack or a security violation occurs.Starting Price: $9.09 one-time payment -
12
Specops Password Auditor
Specops Software
Authentication and password security is more important than ever. Our password audit tool scans your Active Directory and identifies password-related vulnerabilities. The collected information generates multiple interactive reports containing user and password policy information. Specops Password Auditor is a read-only program, and available for free download. Analyze your domain password policies, and fine-grained password policies, to see if they enable users to create secure passwords. Generate reports to identify accounts with password vulnerabilities, including expired passwords, identical passwords, blank passwords, and more. In addition to these insights, Specops Password Auditor allows you to measure the effectiveness of your policies against a brute-force attack. For a complete list of the password reports, see the product overview.Starting Price: Free -
13
Intelligent Management Center
Hewlett Packard Enterprise
Aruba AirWave is the only multi-vendor wired and wireless network management solution designed with mobile devices, users and apps in mind. By proactively monitoring the health and performance of all things connected, AirWave gives IT the insights needed to support today’s digital workplace. As network management becomes more complex, the risks associated with compromised data flow have also increased. HPE Intelligent Management Center (IMC) delivers comprehensive management across campus core and data center networks. IMC converts meaningless network data to actionable information to keep your network, and your business, moving. HPE network and service management solutions support telco networks from the core to the edge allowing operators to seize the profits of 5G. Simplify the management of data center and the Fibre Channel (FC) storage area network (SAN) fabrics. HPE IMC Branch Intelligent Management System. Enable remote network management of Customer Premises Equipment (CPE).Starting Price: $2000.00/one-time -
14
Sqreen
Sqreen
Security built into every app. Everywhere. Application security platform that helps teams protect applications, increase visibility and secure code. Protect applications by preventing data breaches, stopping account takeovers and blocking business logic attacks. Increase visibility by monitoring incidents in real time, streamlining incident response management and automating your application inventory. Secure code by finding critical threats, fixing vulnerabilities and integrating security into the SDLC. Protect, observe and test your applications through a single platform and apply a holistic security approach. Analyze application execution logic in real-time to deliver more robust security without compromising performance. Sandboxed microagents dynamically adapt to evolving applications and threats without requiring maintenance.Starting Price: $499 per month -
15
Lynis Enterprise
CISOfy
Lynis Enterprise performs security scanning for Linux, macOS, and Unix systems. It helps you discover and solve issues quickly, so you can focus on your business and projects again. It is fairly unique for a company to focus on just a few operating systems. In a field where there are so many services and software solutions, we specialize in Linux and Unix security. The primary focus of Lynis is to perform a health check of systems. It helps also to detect vulnerabilities and configuration management weaknesses. Lynis Enterprise is a software solution to perform security auditing, compliance testing, and apply system hardening. It includes Lynis in the core and focuses on environments with Linux, macOS, or other Unix-based systems.Starting Price: $90 per year -
16
PerfectMail Antispam
PerfectMail
PerfectMail delivers better than 99% filter accuracy with false positives (wanted e-mail blocked as spam) at less than 0.1%. PerfectMail automatically learns about your users and their regular e-mail peers and never blocks their e-mail. The only time PerfectMail might have an issue is with a questionable e-mail from new senders. This takes the risk out of antispam filtering. Most spam filters work like this: receive e-mail, queue, filter, deliver or send a non-delivery reply. The problem with this model is that mail is delayed and senders/recipients may never realize that wanted messages were blocked. PerfectMail works in real-time meaning that it filters messages as they are received - without queuing. This means that PerfectMail tells the sender if their message is being blocked. - PerfectMail's antispam engine is programmed C - the fastest programming language in the world.Starting Price: $499 one-time payment -
17
Themis
Cossack Labs
Secure Cell is a multi-mode cryptographic container suitable for storing anything from encrypted files to database records. Use Secure Cell to encrypt data at rest. Secure Cell is built around AES-256-GCM, AES-256-CTR. Secure Message is a simple encrypted messaging solution for the widest scope of applications. Use Secure Message to send encrypted and signed data from one user to another, from client to server, to prevent MITM attacks and avoid single secret leakage. Based on ECC + ECDSA / RSA + PSS + PKCS#7. Zero-knowledge proof-based protocol to compare secrets over non-trusted channels without risking leaks or reuse attacks. Use Secure Comparator for authenticating the users in a way that no password (or password hash) is sent over the network. Secure Session is a session-oriented encrypted data exchange with forward secrecy for better security guarantees and more demanding infrastructures.Starting Price: $0.01 -
18
VIPole
VIPole
Message editing and deleting, auto-delete messages, chat window clearing and complete history wiping. Disconnecting devices remotely, fake secret phrase, auto lock and auto logout on inactivity. Hidden and blacklist contacts, individual visibility settings for contacts, configurable contact authorization. Assign tasks to yourself and colleagues, track the progress. Store and organize passwords, securely share them with contacts. Foster collaboration by setting goals for the team and monitoring the solved issues.Starting Price: $5.99 per month -
19
Sophos UTM
Sophos
Sophos UTM drives threat prevention to unmatched levels. The artificial intelligence built into Sophos Sandstorm is a deep learning neural network, an advanced form of machine learning, that detects both known and unknown malware without relying on signatures. Sophos UTM 9.4 is one of the first Sophos products to offer our advanced next-gen cloud sandboxing technology. Sandstorm provides a whole new level of ransomware and targeted attack protection, visibility, and analysis. It can quickly and accurately identify evasive threats before they enter your network. And, it’s tremendous value: it’s enterprise-grade protection without the enterprise-grade price-tag or complexity. Harden your web servers and Microsoft Enterprise Applications against hacking attempts while providing secure access to external users with reverse proxy authentication. Full SMTP and POP message protection from spam, phishing and data loss with our unique all-in-one protection. -
20
LevelBlue USM Anywhere
LevelBlue
Elevate your security with LevelBlue USM Anywhere, an advanced open XDR platform designed to scale with your evolving IT landscape and growing business needs. Combining sophisticated analytics, robust security orchestration, and automation, USM Anywhere offers built-in threat intelligence for quicker and more precise threat detection, as well as streamlined response coordination. Its flexibility is unmatched, with extensive integrations—referred to as BlueApps—that enhance its detection and orchestration across hundreds of third-party security and productivity tools. These integrations also enable you to trigger automated and orchestrated responses effortlessly. Begin your 14-day free trial now and discover how our platform simplifies cybersecurity. -
21
Praetorian Chariot
Praetorian
Chariot is the first all-in-one offensive security platform that comprehensively catalogs Internet-facing assets, contextualizes their value, identifies and validates real compromise paths, tests your detection response program, and generates policy-as-code rules to prevent future exposures from occurring. As a concierge managed service, we operate as an extension of your team to reduce the burden of day-to-day blocking and tackling. Dedicated offensive security experts are assigned to your account to assist you through the full attack lifecycle. We remove the noise by verifying the accuracy and importance of every risk before ever submitting a ticket to your team. Part of our core value is only signaling when it matters and guaranteeing zero false positives. Gain the upper-hand over attackers by partnering Praetorian. We put you back on the offensive by combining security expertise with technology automation to continuously focus and improve your defensive. -
22
Infocyte
Infocyte
The Infocyte Managed Detection and Response platform helps security teams proactively hunt, detect, and respond to cyber threats and vulnerabilities resident within their network—across physical, virtual, and serverless assets. Our MDR platform provides asset and application discovery, automated threat hunting, and on-demand incident response capabilities. Combined, these proactive cyber security practices help organizations control attacker dwell time, reduce overall cyber risk, maintain compliance, and streamline security operations. -
23
Zeek
The Zeek Project
Zeek (formerly Bro) is the world’s leading platform for network security monitoring. Flexible, open source, and powered by defenders. Zeek has a long history in the open source and digital security worlds. Vern Paxson began developing the project in the 1990s under the name “Bro” as a means to understand what was happening on his university and national laboratory networks. Vern and the project’s leadership team renamed Bro to Zeek in late 2018 to celebrate its expansion and continued development. Zeek is not an active security device, like a firewall or intrusion prevention system. Rather, Zeek sits on a “sensor,” a hardware, software, virtual, or cloud platform that quietly and unobtrusively observes network traffic. Zeek interprets what it sees and creates compact, high-fidelity transaction logs, file content, and fully customized output, suitable for manual review on disk or in a more analyst-friendly tool like a security and information event management (SIEM) system.Starting Price: Free -
24
AP Lens
AP Lens
AP Lens is a Sandbox Browser that isolates networks using DNS Whitelisting. We stop the attack before it reaches the network. What does AP Lens provide? - Web Filtering: Flexible and user-friendly content blocking. - Anti-Phishing: Stop look-alike domains with 100% accuracy. - Ransomware Protection: Isolate the network without affecting business applications. - Secure Remote Work: Enforce internet usage policies without VPN slowness. - No More 0-Day Attacks: Escape the limits of blacklisting with AP Lens Augmented Whitelist. - Compliant: AP Lens meets regulatory requirements requested by cybersecurity insurance policies. - One-Click Installation: No need for a lengthy setup process or updating from the user's side. - No Maintenance: Stop malware and phishing without continuous monitoring. Our team builds on over 20 years of experience in cyber security, cloud security, and information protection in industries such as private banking and the public sector.Starting Price: $5 -
25
InterceptSuite
InterceptSuite
InterceptSuite is a comprehensive MITM proxy and TLS interception tool designed for security professionals, developers, system administrators, and network engineers. It features advanced SOCKS5 proxy capabilities with Python extension support, allowing users to write custom protocol dissectors and analysers for any TLS-encrypted protocol. The platform offers cross-platform compatibility across Windows, macOS, and Linux, with both free open-source and professional editions available. Key features include TLS packet interception, Universal TLS Upgrade Detection for protocols like SMTPS, IMAP, PostgreSQL TLS, and STARTTLS, plus PCAP file export for analysis with external tools like Wireshark.Starting Price: $10/month -
26
A tidal wave of vulnerabilities, but you can’t fix them all. Rely on extensive threat intel and patented prioritization to cut costs, save time, and keep your teams efficiently focused on reducing the biggest risks to your business. This is Modern Risk-Based Vulnerability Management. We created Risk-Based Vulnerability Management software and now we’re defining the modern model. Show your security and IT teams which infrastructure vulnerabilities they should remediate, when. Our latest version reveals exploitability can be measured, and accurately measuring exploitability can help you minimize it. Cisco Vulnerability Management (formerly Kenna.VM) combines real-world threat and exploit intelligence and advanced data science to determine which vulnerabilities pose the highest risk and which you can deprioritize. Spoiler alert: Your mega-list of “critical vulnerabilities” will shrink faster than a woolen sweater-vest in a hot cycle.
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27
indeni
indeni
Indeni’s security infrastructure automation platform monitors firewall health and auto-detects issues like misconfigurations or expired licenses before they affect network operations. It automatically prioritizes issues so you only receive the most important alerts. Indeni protects your cloud environment by taking a snapshot of it before it’s built. Our cloud security analysis tool, Cloudrail, reviews your infrastructure-as-code files so you can identify violations earlier in development when they’re easier to fix. Constant detection of HA unreadiness from cross-device inconsistencies in security policies, forwarding tables, and other configurations and state. Consistent measurement of device configuration skew against locally-defined organizational standards. Collect relevant performance and configuration data from leading firewalls, load balancers, and other security infrastructure. -
28
vArmour
vArmour
Legacy perimeters are irrelevant in modern cloud-based, remotely accessed, 24/7 enterprises. Hybrid environments are complex. People work from anywhere, at any time. But you still don’t know where all your applications, infrastructure, people, and data are, or the millions of dynamic interconnections among them. vArmour lets you automate, analyze, and act. Now. Based on what is happening currently or what happened last week. With no new agents. No new infrastructure. You are up and running fast with full coverage across your enterprise. Complete visibility means you create business and security policies to secure your assets and your business, significantly decreasing risk, ensuring compliance and building resiliency. Enterprise-wide protection built for the world of today, not yesterday. -
29
FireMon
FireMon
Maintaining a strong security and compliance posture requires comprehensive visibility across your entire network. See how you can gain real-time visibility and control over your complex hybrid network infrastructure, policies and risk. Security Manager provides real-time visibility, control, and management for network security devices across hybrid cloud environments from a single pane of glass. Security Manager provides automated compliance assessment capabilities that help you validate configuration requirements and alert you when violations occur. Whether you need audit reports ready out-of-the-box or customizable reports tailored to your unique requirements, Security Manager reduces the time you spend configuring policies and gives you the confidence that you’re ready to meet your regulatory or internal compliance audit demands. -
30
Privatoria
Privatoria
If уоu аrе соnсеrnеd аbоut уоur оnlіnе ѕаfеtу, you ѕhоuld trу ѕоmе methods that wіll hide уоur identity. The mоѕt widely uѕеd today аrе thоѕе that hide the ір. Such methods іnсludе the use оf рrоxу servers and software рrоgrаmѕ. VPN is a good tool to keep you safe and anonymous at the same time. It creates a secure and encrypted connection between you and accessed website. When you connect to a VPN server all your traffic goes through an encrypted tunnel and none can see it until it exits the tunnel and accesses a public internet. If you are connecting to websites with HTTPS encryption, your personal data stays secure even when it exits the tunnel. VPN protects information and allows to leave no footprints while surfing the web.Starting Price: $2.74 per user per month
