Sinkhole objects

A sinkhole object is a network security object that

  • represents either a DNS server that gives non-routable addresses for all domain names within the sinkhole

  • can represent an IP address that does not resolve to a server, and

  • requires assignment of both an IPv4 address and an IPv6 address.

Sinkhole object usage in DNS policy rules

You can reference the sinkhole object within a DNS policy rule to redirect matching traffic to the sinkhole.