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

[Takuma Tsutsumi]

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>:

> 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
>>>>
>>>>
>>>>
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>>>> http://mailman.qos.ch/mailman/listinfo/logback-user
>>>>
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>
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