Re: question about resolving of AAAA amazoses.com

“Not considering a code reversion on the F5’s yet” (not upgrade)

J

From: Jeff Sumner <[email protected]>
Date: Saturday, July 5, 2025 at 7:55 AM
To: [email protected] <[email protected]>
Subject: Re: question about resolving of AAAA amazoses.com
Doing battle with the exact same problem – from an over-the-weekend F5 upgrade.

So funny this is coming up now. We’re not considering a code upgrade yet, but users are complaining about the Real ISC-BIND servers returning SERVFAIL for AAAA queries (not subzone, yada yada) against F5 delegated servers.

J

From: bind-users <[email protected]> on behalf of Ondřej Surý <[email protected]>
Date: Saturday, July 5, 2025 at 12:03 AM
To: Florian Piekert <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: question about resolving of AAAA amazoses.com
Specifically in this case the incorrect chain starts here:

> $ dig IN AAAA feedback-smtp.us-east-1.amazonses.com @ns-265.awsdns-33.com.
>
> ; <<>> DiG 9.21.8-1+0~20250521.138+debian12~1.gbpefbbeb-Debian <<>> IN AAAA feedback-smtp.us-east-1.amazonses.com @ns-265.awsdns-33.com.
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11817
> ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 4, ADDITIONAL: 1
> ;; WARNING: recursion requested but not available
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;feedback-smtp.us-east-1.amazonses.com. IN AAAA
>
> ;; AUTHORITY SECTION:
> feedback-smtp.us-east-1.amazonses.com. 60 IN NS ns-1244.awsdns-27.org.
> feedback-smtp.us-east-1.amazonses.com. 60 IN NS ns-1739.awsdns-25.co.uk.
> feedback-smtp.us-east-1.amazonses.com. 60 IN NS ns-82.awsdns-10.com.
> feedback-smtp.us-east-1.amazonses.com. 60 IN NS ns-968.awsdns-57.net.
>
> ;; Query time: 28 msec
> ;; SERVER: 2600:9000:5301:900::1#53(ns-265.awsdns-33.com.) (UDP)
> ;; WHEN: Sat Jul 05 05:59:17 CEST 2025
> ;; MSG SIZE  rcvd: 202

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