[Dnsmasq-discuss] Max num of concurrent dns reached troubleshootting

[john doe]

Hi Simon, bottom posting

On 1/21/2018 12:55 AM, Simon Kelley wrote:
> Sounds like you're just tickling the limit. Maybe just increase it with
> 
> --dns-forward-max
> 
> 
> Cheers,
> 
> Simon.
> 
> 
> On 19/01/18 07:30, john doe wrote:
>> Hi Simon, bottom posting.
>>
>> On 1/18/2018 11:16 PM, Simon Kelley wrote:
>>> Use log-queries to see what's happening. You should be looking for
>>> outgoing queries which don't see an answer.
>>>
>>>
>>> Cheers,
>>>
>>> Simon.
>>>
>>>
>>> On 16/01/18 15:34, john doe wrote:
>>>> Hi,
>>>>
>>>> First of all a big thank you for dnsmasq.
>>>> It's an easy dhcp, dns, read only tftp server to configure.
>>>>
>>>>
>>>> On a perimeterfirewall the logs gets flutted with the following:
>>>> Jan 15 22:32:23 dnsmasq[546]: Maximum number of concurrent DNS queries
>>>> reached (max: 150)
>>>> Jan 16 00:06:34 dnsmasq[546]: Maximum number of concurrent DNS queries
>>>> reached (max: 150)
>>>>
>>>> Note that only one server (gateway) is connected to the
>>>> perimeterfirewall.
>>>>
>>>> How can I determine wherein lies  the problem (perimeterfirewall or
>>>> gateway)?
>>>>
>>>> In other words: what should I do to understand what's triggering those
>>>> messages.
>>>>
>>>> Both the gateway and the perimeterfirewall are on Debian 9 using:
>>>> dnsmasq, systemd-resolved and resolvconf(8).
>>>>
>>>> -John
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Dnsmasq-discuss mailing list
>>> Dnsmasq-discuss at lists.thekelleys.org.uk
>>> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
>>>
>>
>> Thanks for your answer.
>> The issue I'm facing is not occuring all the time and I'm wandering if
>> 'log-queries' could be only passed to dnsmasq when those messages are
>> logged.
>>
>> In other words: How can I pass options to an already running instance of
>> dnsmasq.
>>
>> I really appriciate any help! :)
>>
> 

Indeed increasing that option does the tric! :)
It's been a fiew days now that I'm not seeing those messages in the log.
I will need to understand why increasing that option works and what are 
the consequences if any.

Thanks for your time and for your help! :)

-- 
John Doe