nanog mailing list archives
Re: NXDOMAIN Resolvers
From: William Herrin <bill () herrin us>
Date: Wed, 20 Apr 2022 08:39:52 -0700
On Wed, Apr 20, 2022 at 8:00 AM Antonia Affinito < antoniaaffinito12 () gmail com> wrote:
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?
Howdy,
From a network engineering perspective, any resolver that responds to an
authoritative NXDOMAIN by generating an address for a courtesy page -is- the malicious actor. Doubly so if they lie about the DNSSEC status in the response. Regards, Bill Herrin -- William Herrin bill () herrin us <https://bill.herrin.us/> https://bill.herrin.us/
Current thread:
- NXDOMAIN Resolvers Antonia Affinito (Apr 20)
- Re: NXDOMAIN Resolvers William Herrin (Apr 20)
- Re: NXDOMAIN Resolvers William Herrin (Apr 20)
- Re: NXDOMAIN Resolvers Matthew Pounsett (Apr 20)
- RE: NXDOMAIN Resolvers Brian Turnbow via NANOG (Apr 20)
- Re: NXDOMAIN Resolvers Thomas Mieslinger (Apr 21)
- Re: NXDOMAIN Resolvers William Herrin (Apr 20)