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Private Resolvers - Found in corporate / restricted networks, not publicly accessible.
Shared Private Resolvers - ISPs or similar hosting service providers
Closed and Public Resolvers - Commercial DNS filtering / scrubbing service.
Open and Public Resolvers - public DNS resolvers, with no access restrictions.
3. In the context of KINDNS
- We make recommendations for two categories: “Private resolvers” and “Shared private resolvers”