Visit the NSA's website for security configuration guides for both Linux and Windows. How YOU configure your security depends on what you are securing and your budget as well as the environment you're in. A home security configuration is vastly different from a small business and a large corporation.
The first two links are tutorials by pooh sun tzu on securing Windows. The second link is a list of all operating system tutorials where you may be able to find something on Fedora but I'm not really sure.