This software is a subdomain enumeration tool.

Purpose
dnssearch takes an input domain ( -domain parameter ) and a wordlist ( -wordlist parameter ), it will then perform concurrent DNS requests using the lines of the wordlist as sub domains eventually bruteforcing every sub domain available on the top level domain.
It supports a custom file extension ( -ext, default to php ) and other optional arguments:

Usage of ./dnssearch:
   -consumers int
         Number of concurrent consumers. (default 8)
   -domain string
         Base domain to start enumeration from.
   -wordlist string
         Wordlist file to use for enumeration. (default "names.txt")
   -a bool
         Lookup A records ( default true )
   -txt bool
         Lookup TXT records ( default false )
   -cname bool
         Show CNAME results ( default false )

Compilation

go get github.com/evilsocket/dnssearch
 cd dnssearch
 go build -o dnssearch main.go

Compilation and use with Docker

docker build -t dnssearch .
 docker run -it --rm dnssearch

License
This project is copyleft of Simone Margaritelli and released under the GPL 3 license.