9.9.9.9 not taking DNS traffic over PCH through DE-CIX in Dallas
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
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
Email sent. Thank you for quick response! Eric ________________________________ From: John Todd <jtodd@quad9.net> Sent: Friday, August 15, 2025 12:15 PM To: North American Network Operators Group <nanog@lists.nanog.org> Cc: Eric C. Miller <eric@ericheather.com> Subject: Re: 9.9.9.9 not taking DNS traffic over PCH through DE-CIX in Dallas 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
participants (2)
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Eric C. Miller -
John Todd