Re: 9.9.9.9 not taking DNS traffic over PCH through DE-CIX in Dallas

[John Todd via NANOG <nanog () lists nanog org>]

On 15 Aug 2025, at 9:00, Eric C. Miller via NANOG wrote:

> A mouthful, but we're seeing an issue where we can ping 9.9.9.9 but not get response to UDP/53 dns queries. Filtering 
> the prefix 9.9.9.0/24 and taking transports seems to run fine. We're also seeing TCP Resets on SecureDNS.
>
> Anyone else seeing something similar?
>
> Eric

Hi Eric -
  Can you please send a full set of debugging to support () quad9 net and we'll take a look. Please include source IP, 
a traceroute when you have that path active, and exact timeframes of the issue.

JT

--
John Todd - jtodd () quad9 net - +41 44 527 99 23
Chief Technology Officer - Quad9 Recursive Resolver

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