reference L3 DNS server

rule:
  meta:
    name: reference L3 DNS server
    namespace: communication/dns
    authors:
      - william.ballenthin@mandiant.com
    scopes:
      static: function
      dynamic: thread
    references:
      - https://www.quora.com/What-is-a-4-2-2-1-DNS-server
  features:
    - or:
      - string: "4.2.2.1"
      - string: "4.2.2.2"
      - string: "4.2.2.3"
      - string: "4.2.2.4"
      - string: "4.2.2.5"
      - string: "4.2.2.6"