dnsBench is a dns server stree test tool
set your gopath and just run go build
command options:
-n int
run through domains N times (default 1)
-p int
server port (default 53)
-path string
file path for domain sets (default "./domains")
-s string
serverAddress (default "127.0.0.1")
-t string
dns type,support A/CNAME (default "A")