[148157] in North American Network Operators' Group
Re: IPv6 resolvers
daemon@ATHENA.MIT.EDU (Seth Mos)
Wed Jan 4 15:40:42 2012
From: Seth Mos <seth.mos@dds.nl>
In-Reply-To: <20120104203310.GA14647@prolixium.com>
Date: Wed, 4 Jan 2012 21:39:39 +0100
To: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hi,
Just pointing out to other responding to this thread that I was =
referring to the *query* response times, I said nothing about ICMP which =
is perfectly fine.
So please stop responding with ping response times already :-)
No, pfSense does not set these per default, they are in wide use because =
these are part of the Google DNS whitelist for V6 records.
Op 4 jan 2012, om 21:33 heeft Mark Kamichoff het volgende geschreven:
> ;; ANSWER SECTION:
> cnn.com. 299 IN A 157.166.226.26
> cnn.com. 299 IN A 157.166.255.19
> cnn.com. 299 IN A 157.166.255.18
> cnn.com. 299 IN A 157.166.226.25
And a similar mistake I see others respond too as well, this is another =
domain with just a IPv4 record. That was not really what I was =
complaining about but I was not specific enough in my email
When requesting the DNS for the hostname with a Quad A the story is =
entirely different!
Try www.pfsense.com or www.didi.nl
Those will definitely hit the issue, otherwise one can always use =
Nanog.org like below.
74.82.42.42 2204 msec=20
2001:4860:4860::8844 17 msec=20
2001:470:20::2 2890 msec
=20
Best regards,
Seth
>=20
> ;; Query time: 38 msec
> ;; SERVER: 74.82.42.42#53(74.82.42.42)
> ;; WHEN: Wed Jan 4 15:27:17 2012
> ;; MSG SIZE rcvd: 89
>=20
> (neodymium:15:32)% dig @2001:470:20::2 cnn.com. A
>=20
> ; <<>> DiG 9.7.3 <<>> @2001:470:20::2 cnn.com. A
> ; (1 server found)
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41382
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0
>=20
> ;; QUESTION SECTION:
> ;cnn.com. IN A
>=20
> ;; ANSWER SECTION:
> cnn.com. 295 IN A 157.166.226.25
> cnn.com. 295 IN A 157.166.255.18
> cnn.com. 295 IN A 157.166.255.19
> cnn.com. 295 IN A 157.166.226.26
>=20
> ;; Query time: 20 msec
> ;; SERVER: 2001:470:20::2#53(2001:470:20::2)
> ;; WHEN: Wed Jan 4 15:32:27 2012
> ;; MSG SIZE rcvd: 89
>=20
> That being said, keep in mind these are anycasted. I'm using
> 216.66.22.2 [tserv13.ash1.ipv6.he.net] for IPv4 and 209.51.161.14
> [tserv4.nyc4.ipv6.he.net] according to the A record returned by
> whoami.akamai.net. I might not be hitting the same server you are.
>=20
> - Mark
>=20
> --=20
> Mark Kamichoff
> prox@prolixium.com
> http://www.prolixium.com/
