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Here is a list of obsolete DNS record types.

  1. Should I restrict my DNS server to not respond to these query types?
  2. Why are current public DNS servers responding to these query types?

closed as off-topic by Conor Mancone, schroeder Aug 2 at 8:09

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question does not appear to be about Information security within the scope defined in the help center." – Conor Mancone, schroeder
If this question can be reworded to fit the rules in the help center, please edit the question.

  • I'm not sure what the security angle is here – schroeder Aug 1 at 14:11
  • The general rule of thumb for any service is to only expose that which you need. – schroeder Aug 1 at 14:12
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Should I restrict my DNS server to not respond to these query types?

So long as you don't have any DNS records of these types in your zones -- which you probably don't -- there's no need to "restrict" anything. If your DNS server is queried for records of these types, it will (correctly) respond that none exist.

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