Re: NXDOMAIN Resolvers

[Thomas Mieslinger <miesi () mail com>]

There are public and commercial offerings for "DNS based protection".

e.g. 9.9.9.9 automatically generates NXDomains for suspected malicious
DNS Names even in their free service.

They have a page where you can check if you have been blacklisted (see
https://www.quad9.net/de/result)


On 4/20/22 11:07, Antonia Affinito wrote:
> Good morning,
> I am currently analysing the DNS resolvers (local and public ones) in
> terms of protection and performance (in particular their speed).
> I noticed that, in case of a malicious domain name, some local resolvers
> send an NXDOMAIN and others a courtesy page address. Do you know if the
> resolvers (for example TIM, Wind or Fastweb) can return an NXDomain in
> order to protect their clients?
>
> Thanks a lot
>
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