[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [public-dns-discuss] DNS64 Not Resolving Addresses



Erik,

Where are you seeing the outage you indicated? Is that for an anycast presence of the Google DNS64 server? All my Comcast IPv6 routing looks fine. I get a /60 from them. If I use OpenDNS resolvers over IPv6, things are fine. However, OpenDNS does not do DNS64...

Do you know of other public DNS64 resolvers I could test with?


For the Public Google DNS64, all my DNS requests fail/timeout. Also traceroute dies. Ping works but does have several outlier responses. Something is definitely not right. Packet capture yield not responses back for the queries. What else can I try?


dig any cnn.com +trace +all @2001:4860:4860::6464

; <<>> DiG 9.8.3-P1 <<>> any cnn.com +trace +all @2001:4860:4860::6464
;; global options: +cmd
;; connection timed out; no servers could be reached


traceroute6 2001:4860:4860::6464
traceroute6 to 2001:4860:4860::6464 (2001:4860:4860::6464) from 2601:2c3:887f:5f70:6de8:3736:60b9:ee47, 64 hops max, 12 byte packets
 1  2601:2c3:887f:5f70::c15:c0  6.203 ms  5.407 ms  3.957 ms
 2  2001:558:4081:6b::1  12.892 ms  18.034 ms  12.819 ms
 3  ae-102-rur02.grant.tx.houston.comcast.net  17.096 ms  13.331 ms  15.420 ms  4  ae-37-ar01.bearcreek.tx.houston.comcast.net  17.022 ms  16.061 ms  14.924 ms
 5  be-33662-cr02.dallas.tx.ibone.comcast.net  21.308 ms


Thanks for the guidance.


Jeffry J. Handal

On 6/16/18 6:06 AM, Erik Kline wrote:
Hmmm.  From Japan:

dig -t AAAA ipv4.google.com @2001:4860:4860::6464

; <<>> DiG 9.10.6 <<>> -t AAAA ipv4.google.com @2001:4860:4860::6464
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16110
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;ipv4.google.com. IN AAAA

;; ANSWER SECTION:
ipv4.google.com. 21599 IN CNAME ipv4.l.google.com.
ipv4.l.google.com. 299 IN AAAA 64:ff9b::acd9:188e

;; Query time: 48 msec
;; SERVER: 2001:4860:4860::6464#53(2001:4860:4860::6464)
;; WHEN: Sat Jun 16 19:58:12 JST 2018
;; MSG SIZE  rcvd: 93

"dig any cnn.com +trace +all @2001:4860:4860::6464" is also quite voluminous.

Are you still seeing an outage from your location? (whois suggests:

NetName:        HOUSTON-RPD-V6-2
NetHandle:      NET6-2601-2C0-1
Parent:         COMCAST6NET (NET6-2601-1)

but that's not necessarily authoritative)
On Sat, 16 Jun 2018 at 14:45, Jeffry Handal <jhandal11 AT gmail.com> wrote:
Erik and team,



The public DNS64 resolvers are pingable but do not resolve. The
following simple test is coming from an IPv6-only network that is behind
NAT64.

ping6 2001:4860:4860::6464
PING6(56=40+8+8 bytes) 2601:2c3:887f:5f73:11b7:5c86:b051:5c2c -->
2001:4860:4860::6464
16 bytes from 2001:4860:4860::6464, icmp_seq=0 hlim=42 time=133.313 ms
16 bytes from 2001:4860:4860::6464, icmp_seq=1 hlim=42 time=25.670 ms

ping6 2001:4860:4860::64
PING6(56=40+8+8 bytes) 2601:2c3:887f:5f73:11b7:5c86:b051:5c2c -->
2001:4860:4860::64
16 bytes from 2001:4860:4860::64, icmp_seq=0 hlim=44 time=635.711 ms
16 bytes from 2001:4860:4860::64, icmp_seq=3 hlim=44 time=1911.751 ms
16 bytes from 2001:4860:4860::64, icmp_seq=4 hlim=44 time=915.951 ms
16 bytes from 2001:4860:4860::64, icmp_seq=5 hlim=44 time=24.304 ms
16 bytes from 2001:4860:4860::64, icmp_seq=6 hlim=44 time=23.048 ms

ping6 google.com
ping6: getaddrinfo -- nodename nor servname provided, or not known


dig google.com @2001:4860:4860::6464


   nslookup
  > server 2001:4860:4860::6464
Default server: 2001:4860:4860::6464
Address: 2001:4860:4860::6464#53
  > google.com


   dig any cnn.com +trace +all

; <<>> DiG 9.8.3-P1 <<>> any cnn.com +trace +all
;; global options: +cmd
;; connection timed out; no servers could be reached


cat /etc/resolv.conf
#
# Mac OS X Notice
#
# This file is not used by the host name and address resolution
# or the DNS query routing mechanisms used by most processes on
# this Mac OS X system.
#
# This file is automatically generated.
#
nameserver 2001:4860:4860::6464
nameserver 2001:4860:4860::64



Thank you in advance for the guidance.



--
Jeffry J. Handal

--
--
========================================================
You received this message because you are subscribed to the Google
Groups "public-dns-discuss" group.
To post to this group, send email to public-dns-discuss AT googlegroups.com
To unsubscribe from this group, send email to
public-dns-discuss+unsubscribe AT googlegroups.com
For more options, visit this group at
http://groups.google.com/group/public-dns-discuss
For more information on Google Public DNS, please visit
http://developers.google.com/speed/public-dns
========================================================
---
You received this message because you are subscribed to the Google Groups "public-dns-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email to public-dns-discuss+unsubscribe AT googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--
--
========================================================
You received this message because you are subscribed to the Google
Groups "public-dns-discuss" group.
To post to this group, send email to public-dns-discuss AT googlegroups.com
To unsubscribe from this group, send email to public-dns-discuss+unsubscribe AT googlegroups.com
For more options, visit this group at
http://groups.google.com/group/public-dns-discuss
For more information on Google Public DNS, please visit
http://developers.google.com/speed/public-dns
========================================================
--- You received this message because you are subscribed to the Google Groups "public-dns-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email to public-dns-discuss+unsubscribe AT googlegroups.com.
For more options, visit https://groups.google.com/d/optout.