DNSBench – Benchmark tool for DNS Servers
How do you know if your DNS servers are performing well, if you never measure them? DNSBench is the tool for measuring the performance of your DNS servers as well as many other DNS servers on the Internet. By comparing the performance of various servers, you can find out if there is a better server to be using. Being that DNS queries occur multiple times for every webpage visited, the performance of your DNS server will impact your browsing speed and the response time of many application.
Download Link – http://www.grc.com/dns/benchmark.htm