ClearOS是一份面向小型企業及分散式環境設計的網路和網關伺服器。它基於CentOS，而這是Red Hat Enterprise Linux的一份克隆。該發行包含了一全套的特性和集成服務，通過一份直觀的、基於網頁的介面可以很容易地配置它們。ClearOS包含的部分工具有反病毒、反垃圾郵件、虛擬專用網、內容過濾、網路帶寬管理器、SSL認證、網頁日誌分析程序，而這些僅僅是可用模塊中的一部分。該發行通過免費下載的方式來提供，這當中包含了18個月的免費安全更新。
ClearFoundation has announced the availability of the first beta release of ClearOS 5.1, a CentOS-based distribution for servers and firewalls formerly known as ClarkConnect: "We are excited to announce that ClearOS 5.1 beta has just been released. This is an important day for the ClearFoundation community as we take the next step in our journey. You are invited to evaluate ClearOS 5.1 beta and join in the growing community surrounding the most tightly integrated and simple IT solution for small businesses and distributed environments. ClearOS 5.1 beta is based upon a fifth generation Linux distribution (historically know as ClarkConnect) with over 120,000 registered sites. ClearOS 5.1 beta works in tandem with ClearSDN to deliver cloud services such as dynamic VPN client, dynDNS, multi-WAN, offsite backup, antivirus firewall, spam blocker, web filter, cloud application integration and more." Here is the brief release announcement. Download (MD5): clearos-enterprise-5.1-beta1.iso (676MB).（責任編輯：A6）
[火星人 ] 開發版ClearOS 5.1 Beta 1已經有423次圍觀
