Ubuntu – dnsmasq sometimes resolves things, sometimes it doesn’t

12.04dnsmasq

Trying to resolve:

nslookup testserverinlocaldns

Server: 127.0.0.1

Address: 127.0.0.1#53

** server can't find testserverinlocaldns: NXDOMAIN

After 10 seconds everything is ok:

nslookup testserverinlocaldns

Server: 127.0.0.1

Address: 127.0.0.1#53

Name: testserverinlocaldns.localnet

Address: 192.168.3.8

And the same thing again and again. Sometimes it resolves, sometimes not. When I set resolv.conf to local DNS servers manually – everything is ok. But after reboot it gets back to 127.0.0.1 again.

Best Answer

I have this inside my internal network, and I solved it by disabling the local forwarding nameserver controlled by NetworkManager (dnsmasq).

To do that, you need to edit /etc/NetworkManager/NetworkManager.conf and comment out the “dns=dnsmasq” line in the "[main]" section.

Open a terminal, and run

sudo nano /etc/NetworkManager/NetworkManager.conf

Then make sure that the line

dns=dnsmasq

is commented out like this:

#dns=dnsmasq

Now, restart network-manager with the following command, and everything should work properly.

sudo restart network-manager

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