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On 2017-03-05 13:07, Unman wrote:
> On Sun, Mar 05, 2017 at 09:25:07PM +0100, 'Antoine' via qubes-users wrote:
>> Hi,
>>
>> I have recently installed Qubes OS and I am experiencing some slow time
>> resolution in my debian VM. I have checked the /etc/resolv.conf file and
>> it contains the following lines:
>>
>> nameserver 10.137.2.1
>> nameserver 10.137.2.254
>>
>> Playing with dig I can realise that the first IP is working well while
>> all DNS queries sent to the second one finish in timeout:
>>
>> $ dig +short qubes-os.org @10.137.2.1
>> 104.25.152.101
>> 104.25.151.101
>> $ dig +short qubes-os.org @10.137.2.254
>> ;; connection timed out; no servers could be reached
>>
>> In sys-firewall, everything seems OK:
>>
>> $ iptables -S -t nat
>> [...]
>> -A PR-QBS -d 10.137.2.1/32 -p udp -m udp --dport 53 -j DNAT --to-destination 
>> 10.137.1.1
>> -A PR-QBS -d 10.137.2.1/32 -p tcp -m tcp --dport 53 -j DNAT --to-destination 
>> 10.137.1.1
>> -A PR-QBS -d 10.137.2.254/32 -p udp -m udp --dport 53 -j DNAT 
>> --to-destination 10.137.1.254
>> -A PR-QBS -d 10.137.2.254/32 -p tcp -m tcp --dport 53 -j DNAT 
>> --to-destination 10.137.1.254
>>
>> But I have the feeling something is missing in sys-net:
>>
>> $ iptables -S -t nat
>> [...]
>> -A PR-QBS -d 10.137.1.1/32 -p udp -m udp --dport 53 -j DNAT --to-destination 
>> 192.168.1.1
>> -A PR-QBS -d 10.137.1.1/32 -p tcp -m tcp --dport 53 -j DNAT --to-destination 
>> 192.168.1.1
>> [...]
>>
>> where 192.168.1.1 is the expected DNS server on my LAN.
>>
>> Do you have an idea why this DNAT rule is missing? (I am not sure to
>> understand why 2 different nameserver are filled in resolv.conf).
>>
>> Many thanks for your help,
>>
>> Antoine
>>
>> -- 
> 
> No idea - report it as a bug
> 

Filed a bug report:

https://github.com/QubesOS/qubes-issues/issues/2674

Antoine, you didn't mention which version of Qubes or Debian you're
using, so I assumed Qubes 3.2 and the Debian 8 TemplateVM.

- -- 
Andrew David Wong (Axon)
Community Manager, Qubes OS
https://www.qubes-os.org
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