DNS Expert - Version 1.6 A comprehensive and flexible DNS analysis and problem-solving tool that provides complete, systematic analysis of DNS records for any number of domains (tests multiple domain), isolates errors and offers solutions to the most complex problems. DNS Expert checks for configuration errors and security vulnerabilites that make networks vulnerable to hacker attacks. DNS Expert analyzes Internet and Intranet DNS records on all DNS servers for Unix, NT, Mac OS or any other operating system. DNS Expert licenses are available for small businesses as well as medium and large enterprises.