 It was first available in BIND release 9.8.1 released 2010, and first publicly announced at Black Hat in July, 2010.The RPZ mechanism is published as an open and vendor-neutral standard for the interchange of DNS Firewall configuration information, allowing other DNS resolution software to implement it.RPZ was developed as a technology to combat the misuse of the DNS by groups and/or persons with malicious intent or other nefarious purposes.