ClearOS
A very good alternative for Windows Server, for free
ClearOS Alternatives
The best ClearOS alternatives based on verified products, community votes, reviews and other factors.
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pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
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Linux directory, domain, mail, gateway and infrastructure server for SMBs.
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Serverspace offers automated, simple, and affordable cloud infrastructure to everyone. Get started building your cool digital stuff right now.
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NethServer is an operating system for Linux enthusiasts, designed for small offices and medium...
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OPNsense® you next open source firewall. Free Download. High-end Security Made Easy™. Offers Intrusion Prevention, Captive Portal, Traffic Shaping and more.
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OpenMediaVault is the next generation network attached storage (NAS) solution based on Debian Linux.
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Univention Corporate Server UCS with Active Directory functions and App Center is the cost-efficient and popular successor to Microsoft's server solutions.
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Untangle is a platform for deploying network based applications.
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The main product of MikroTik is a Linux-based operating system known as MikroTik RouterOS.
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IPFire is a server distribution with intended to use as a firewall.
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Endian Firewall Community (EFW) is a "turn-key" linux security distribution that turns...
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OpenWrt is an open-source firmware based on Linux for wireless routers
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Secure, fast and economically scalable, Ubuntu helps you make the most of your infrastructure. Whether you want to deploy a cloud or a web farm, Ubuntu Server supports the most popular hardware and software.
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FreeIPA is an integrated security information management solution combining Linux (Fedora), 389...