IPv6 resolvers

Seth Mos seth.mos at dds.nl
Wed Jan 4 14:39:39 CST 2012


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 
 2001:4860:4860::8844	 17 msec 
 2001:470:20::2	 2890 msec
       
Best regards,

Seth

> 
> ;; 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
> 
> (neodymium:15:32)% dig @2001:470:20::2 cnn.com. A
> 
> ; <<>> 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
> 
> ;; QUESTION SECTION:
> ;cnn.com.			IN	A
> 
> ;; 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
> 
> ;; 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
> 
> 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.
> 
> - Mark
> 
> -- 
> Mark Kamichoff
> prox at prolixium.com
> http://www.prolixium.com/




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