[logback-user] Timeout may frequently occurred on logback.qos.ch [IPv6]

[Takuma Tsutsumi]

Hi Ceki,

I understand the situation.
Thank you for dealing with the problem.

Regards,

Takuma Tsutsumi


2017-04-13 5:21 GMT+09:00 Ceki Gulcu <ceki at qos.ch>:

> Hello Takuma,
>
> There is a problem with our router whereby it fails to keep its IPv6
> configurations. The issue has been fixed now. Moreover, we put online an
> additional server with a fixed IPv6 address. At this time all instances of
> logback.qos.ch servers are configured with IPv6.
>
> I can't guarantee that our router will not fail again. However, the IPv6
> situation should be better now.
>
> Best regards,
>
> --
> Ceki
>
> On 10-Apr-17 12:50 PM, Takuma Tsutsumi wrote:
>
>> Hi Ceki,
>>
>> Sorry to bother you again...
>>
>> Unfortunately, it seems that the same problem is occurring.
>> Would you please investigate this?
>>
>> Regards,
>>
>> Takuma Tsutsumi
>>
>>
>> 2017-03-31 8:37 GMT+09:00 Takuma Tsutsumi <t.tsutsumi.dev at gmail.com
>> <mailto:t.tsutsumi.dev at gmail.com>>:
>>
>>     Hi Ceki,
>>
>>     Thank you for your response.
>>     It seems to be working.
>>
>>     Regards,
>>
>>     Takuma Tsutsumi
>>
>>
>>     2017-03-31 14:09 GMT+09:00 Ceki Gulcu <ceki at qos.ch
>>     <mailto:ceki at qos.ch>>:
>>
>>
>>
>>         I am afraid there is not much I can do regarding the DNS queries
>>         since the provider for the host which does not have an AAAA
>>         record does not support IPv6. Anyway, the router/IPv6 and the
>>         Apache/IPv6 issues have been fixed.
>>
>>         Even http://ready.chair6.net/?url=https://logback.qos.ch
>>         <http://ready.chair6.net/?url=https://logback.qos.ch> seems
>> happy.
>>
>>
>>         Best regards,
>>
>>         --
>>         Ceki
>>
>>
>>         On 3/30/2017 9:25 PM, Ceki Gulcu wrote:
>>
>>             Hi Takuma,
>>
>>
>>             There were multiple issues involved.
>>
>>             1) There was a router issue which dropped all IPv6 packets.
>>             2) there are two DNS servers for the qos.ch <http://qos.ch>
>>             domain. They are configured
>>             differently.
>>             3) There is indeed an APache configuration problem which I
>>             am trying to
>>             identify.
>>
>>             --
>>             Ceki
>>
>>
>>             On 3/30/2017 6:52 AM, Takuma Tsutsumi wrote:
>>
>>                 Hi,
>>
>>                 If using a user-agent that prefer IPv6 such as the Squid
>>                 proxy, a
>>                 timeout may frequently occur on logback.qos.ch
>>                 <http://logback.qos.ch> <http://logback.qos.ch>.
>>
>>                 It seems to me that the IPv6 site does not exist.
>>                  References:
>>                   - http://ready.chair6.net/?url=https://logback.qos.ch
>>                 <http://ready.chair6.net/?url=https://logback.qos.ch>
>>                 <http://ready.chair6.net/?url=https://logback.qos.ch
>>                 <http://ready.chair6.net/?url=https://logback.qos.ch>>
>>                   - http://ipv6-test.com/validate.php
>>                 <http://ipv6-test.com/validate.php>
>>                 <http://ipv6-test.com/validate.php
>>                 <http://ipv6-test.com/validate.php>>
>>
>>                 In addition, it seems that AAAA records may not be
>>                 returned depending on
>>                 DNS query timing.
>>                 ```
>>                 $ date; dig +noall +answer @8.8.8.8 <http://8.8.8.8>
>>                 <http://8.8.8.8> logback.qos.ch <http://logback.qos.ch>
>>                 <http://logback.qos.ch> aaaa
>>                 Thu Mar 30 22:34:03 DST 2017
>>                 logback.qos.ch <http://logback.qos.ch>
>>                 <http://logback.qos.ch>.         279     IN      CNAME
>>                 yvo.qos.ch <http://yvo.qos.ch> <http://yvo.qos.ch>.
>>                 yvo.qos.ch <http://yvo.qos.ch> <http://yvo.qos.ch>.
>>                        279     IN      AAAA
>>                  2a02:121e:969:1:201:c0ff:fe1c:5f7c
>>
>>                 $ date; dig +noall +answer @8.8.8.8 <http://8.8.8.8>
>>                 <http://8.8.8.8> logback.qos.ch <http://logback.qos.ch>
>>                 <http://logback.qos.ch> aaaa
>>                 Thu Mar 30 22:34:05 DST 2017
>>                 logback.qos.ch <http://logback.qos.ch>
>>                 <http://logback.qos.ch>.         299     IN      CNAME
>>                 te.qos.ch <http://te.qos.ch> <http://te.qos.ch>.
>>                 ```
>>
>>                 Would you please investigate this?
>>
>>                 Regards,
>>
>>                 Takuma Tsutsumi
>>
>>
>>
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