NSA develops and distributes configuration guidance for a wide variety of software, both open source and proprietary. We strive to provide NSA customers and the software development community the best possible security options for the most widely used products. NSA does not favor or promote any specific software product or business model. Rather, we promote enhanced security. NSA has developed and maintained configuration guidance for a number of products. Over time these products age, are superceded by newer versions, or are no longer used. As such, NSA may choose to discontinue maintenance and archive some of these guides.