DNS sinkhole

Definition
A DNS sinkhole

{{Quote|works by spoofing the authoritative DNS servers for malicious and unwanted hosts and domains. An administrator configures the DNS forwarder for outbound Internet traffic to return false IP addresses for these known hosts and domains. When a client requests to resolve the address of such a host or domain, the sinkhole returns a non-routable address; or any address except the real address. This denies a client a connection to the target host. DNS Sinkhole (full-text).