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

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