Porkbind is a robust and recursive DNS server vulnerability scanner which retrieves version.bind information for the nameservers and produces a report.
You can download it from the following link: https://packetstormsecurity.com/files/download/69162/porkbind-1.3.tar.gz
Source: https://packetstormsecurity.com/files/69162/porkbind-1.3.tar.gz.html