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Ticket ID: SIXXS #6202986 Ticket Status: Resolved PoP: czprg01 - Ignum, s.r.o. (Prague)
DNS timed out
![[cz]](/s/countries/cz.gif) Shadow Hawkins on Wednesday, 04 January 2012 08:09:14
Hi SixXS admins,
maybe problem with one of DNS servers in Europe?
nslookup
server 2001:7b8:3:4f:202:b3ff:fe46:bec Default server: 2001:7b8:3:4f:202:b3ff:fe46:bec
Address: 2001:7b8:3:4f:202:b3ff:fe46:bec#53
www.bbs.cz ;; connection timed out; no servers could be reached
ping6 2001:7b8:3:4f:202:b3ff:fe46:bec
PING 2001:7b8:3:4f:202:b3ff:fe46:bec(2001:7b8:3:4f:202:b3ff:fe46:bec) 56 data bytes
64 bytes from 2001:7b8:3:4f:202:b3ff:fe46:bec: icmp_seq=1 ttl=58 time=29.4 ms
2 packets transmitted, 2 received, 0% packet loss, time 1000ms
Yours sincerely,
Stanislav Ulman
State change: resolved
The state of this ticket has been changed to resolved
DNS timed out
Shadow Hawkins on Wednesday, 18 January 2012 10:08:48
I have the same problem again.
timeouting DNS servers:
2001:7b8:3:4f:202:b3ff:fe46:bec
2001:1418:10:2::2
nslookup
server 2001:7b8:3:4f:202:b3ff:fe46:bec Default server: 2001:7b8:3:4f:202:b3ff:fe46:bec
Address: 2001:7b8:3:4f:202:b3ff:fe46:bec#53
www.seznam.cz ;; connection timed out; no servers could be reached
server 2001:1418:10:2::2 Default server: 2001:1418:10:2::2
Address: 2001:1418:10:2::2#53
www.seznam.cz ;; connection timed out; no servers could be reached
ping6 is on both OK.
Yours sincerely,
Stanislav Ulman
DNS timed out
nslookup
Please do not use nslookup, please peruse 'dig' as shown below.
Also note that our DNScaches only answer when the request is sourced from SixXS address space.
As such, what the source address of these queries?
$ dig @2001:7b8:3:4f:202:b3ff:fe46:bec ipv6.google.com aaaa
; <<>> DiG 9.7.3-P3 <<>> @2001:7b8:3:4f:202:b3ff:fe46:bec ipv6.google.com aaaa
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56843
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;ipv6.google.com.INAAAA
;; ANSWER SECTION:
ipv6.google.com.83178INCNAMEipv6.l.google.com.
ipv6.l.google.com.300INAAAA2a00:1450:4001:c01::68
;; Query time: 62 msec
;; SERVER: 2001:7b8:3:4f:202:b3ff:fe46:bec#53(2001:7b8:3:4f:202:b3ff:fe46:bec)
;; WHEN: Wed Jan 18 12:46:47 2012
;; MSG SIZE rcvd: 82
$ dig @2001:1418:10:2::2 ipv6.google.com aaaa
; <<>> DiG 9.7.3-P3 <<>> @2001:1418:10:2::2 ipv6.google.com aaaa
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57723
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;ipv6.google.com.INAAAA
;; ANSWER SECTION:
ipv6.google.com.604800INCNAMEipv6.l.google.com.
ipv6.l.google.com.300INAAAA2a00:1450:4001:c01::63
;; Query time: 96 msec
;; SERVER: 2001:1418:10:2::2#53(2001:1418:10:2::2)
;; WHEN: Wed Jan 18 12:47:41 2012
;; MSG SIZE rcvd: 82
DNS timed out
Shadow Hawkins on Thursday, 19 January 2012 08:44:56
...Also note that our DNScaches only answer when the request is sourced from SixXS address space.
You are right, I didn't know it. When I added routes to my routing table, both DNS ansvers correctly.
ip -6 route add 2001:7b8:3:4f:202:b3ff:fe46:bec via 2a01:8c00:ff00:13b::1 dev sixxs
ip -6 route add 2001:1418:10:2::2 via 2a01:8c00:ff00:13b::1 dev sixxs
Thank You very much for the important note!
Stanislav Ulman
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![[ch]](/s/countries/ch.gif)
on Wednesday, 04 January 2012 11:35:48
Posting is only allowed when you are