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

[Takuma Tsutsumi]

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>:

>
>
> 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 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 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>.
>>>
>>> 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://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> logback.qos.ch
>>> <http://logback.qos.ch> aaaa
>>> Thu Mar 30 22:34:03 DST 2017
>>> logback.qos.ch <http://logback.qos.ch>.         279     IN      CNAME
>>> yvo.qos.ch <http://yvo.qos.ch>.
>>> 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> logback.qos.ch
>>> <http://logback.qos.ch> aaaa
>>> Thu Mar 30 22:34:05 DST 2017
>>> logback.qos.ch <http://logback.qos.ch>.         299     IN      CNAME
>>> te.qos.ch <http://te.qos.ch>.
>>> ```
>>>
>>> Would you please investigate this?
>>>
>>> Regards,
>>>
>>> Takuma Tsutsumi
>>>
>>>
>>>
>>> _______________________________________________
>>> logback-user mailing list
>>> logback-user at qos.ch
>>> http://mailman.qos.ch/mailman/listinfo/logback-user
>>>
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