Re: Bad aaaa from www.rt.com

[Ross Chandler]

I’m not getting consistent AAAA responses from publicdns64.google.com for www.rt.com. It isn’t always mapping to 37.48.108.112 whereas the A record seems to consistently point at that IPv4. dig @publicdns64.google.com aaaa www.rt.com ; <<>> DiG 9.8.3-P1 <<>> @publicdns64.google.com aaaa www.rt.com ; (2 servers found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56562 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.rt.com. IN AAAA ;; ANSWER SECTION: www.rt.com. 9 IN AAAA 64:ff9b::cff4:50a6 ;; Query time: 84 msec ;; SERVER: 2001:4860:4860::6464#53(2001:4860:4860::6464) ;; WHEN: Thu Jul  7 06:37:24 2016 ;; MSG SIZE  rcvd: 56 dig @publicdns64.google.com aaaa www.rt.com ; <<>> DiG 9.8.3-P1 <<>> @publicdns64.google.com aaaa www.rt.com ; (2 servers found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26971 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.rt.com. IN AAAA ;; ANSWER SECTION: www.rt.com. 9 IN AAAA 64:ff9b::2530:6c70 ;; Query time: 84 msec ;; SERVER: 2001:4860:4860::6464#53(2001:4860:4860::6464) ;; WHEN: Thu Jul  7 06:41:08 2016 ;; MSG SIZE  dcvd: 56 On 7 Jul 2016, at 05:02, Erik Marcus Kline <e...@google.com> wrote: https://tools.ietf.org/html/rfc6147#section-5.1.4 Thought technically it's just a SHOULD, I recall implementing something about this. On 7 July 2016 at 13:00, Erik Marcus Kline <e...@google.com> wrote: prompt$ dig +short @publicdns64.google.com -t AAAA www.rt.com 64:ff9b::cff4:50a6 On 7 July 2016 at 12:22, Ca By <cb.li...@gmail.com> wrote: Anyone have a contact at www.rt.com that can encourage them to to delete their bad aaaa ? This is breaking nat64 users who see a aaaa so no dns64 is being done. Shared from ISC Dig for iOS ; <<>> DiG 9.10.4 <<>> @fe80::4c60:deff:fee6:b019 @192.168.1.1 www.rt.com aaaa +sit +dnssec +noqr +multiline ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4367 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags: do; udp: 512 ;; QUESTION SECTION: ;www.rt.com.            IN AAAA ;; ANSWER SECTION: www.rt.com.             10 IN AAAA ::ffff:37.48.108.112 ;; Query time: 298 msec ;; SERVER: 192.168.1.1#53(192.168.1.1) ;; WHEN: Wed Jul 06 20:19:34 PDT 2016 ;; MSG SIZE  rcvd: 67