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At my work desktop running openSUSE 11.4, I have a local network which gets its address, domain ( and nameservers (, info through DHCP - which get written into /etc/resolv.conf

I get to access the internet using the work network, and these 2 nameservers end up returning the entries for any public domain name lookups on the internet.

I also have a private VPN that I end up connecting. The nameserver ( and domain ( are rarely bound to change for this network, but currently they're pushed by the openVPN client into networkmanager, and which also gets merged with the existing /etc/resolv.conf

My resolv.conf ultimately ends up looking like this:


As you can see the 2nd nameserver from my work network was pushed out because of the max 3 entry limitations. It is fine still, but would be a problem if that nameserver goes down for maintenance or something.

So I found out that dnsmasq could help me here, and hence I setup dnsmasq just as a local DNS resolver without any DHCP support.

So right now this is my /etc/dnsmasq.conf:


I've made dnsmasq get the list of nameservers from /etc/resolv.conf since NetworkManager seems to be updating this list correctly (for a max of 3 nameservers). I'm able to resolve the host names in both the networks correctly.

So these are the questions I have:

  1. Is there a way I can make either NetworkManager or dhclient write out the list of nameservers somewhere else which I can make dnsmasq use as resolv-file ?
  2. How do I make dnsmasq use certain nameservers as the default for all queries ? Right now I notice that lookups for public domains on the internet are usually sent to both the nameservers - the one on as well as It would be good if I can limit this only to

UPDATE: These are the solutions I've found: In /etc/sysconfig/network/config change the following:


In /etc/dnsmasq.conf add these lines:


I also had to modify my openVPN server.conf not to push nameservers for the clients, since I had already added a server rule in my dnsmasq.conf for that domain.

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BTW, NetworkManager in Ubuntu 12.04 does all of this automatically when connecting to a VPN using NM (i.e. running a dnsmasq so that queries get sent to the right server). – mgorven May 31 '12 at 4:10

1 Answer 1

up vote 1 down vote accepted

If you install resolvconf, NetworkManager will use it instead of writing /etc/resolv.conf directly. The DNS servers from NM can then be found in /var/run/resolvconf/interface/NetworkManager.

dnsmasq is sending all queries to because it's listed in resolv.conf -- you probably want to remove it from resolv.conf so that it only gets used for the domain. The nameservers in resolv.conf are essentially the defaults.

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Thanks for the info about how dnsmasq treats the resolv-file - that helped a lot. After digging a lot, I came to know openSUSE's netconfig tool is kind of similar to resolvconf or openresolv does underneath - helps merge nameserver entries into a file. The behaviour is controlled by NETCONFIG_DNS_FORWARDER= which I have set to dnsmasq. It writes the nameservers into /var/run/dnsmasq-forwarders.conf which I've set as resolv-file in dnsmasq.conf. I've now also set NETCONFIG_DNS_FORWARDER_FALLBACK="no" to make sure no nameserver entries are written into /etc/resolv.conf. – Tuxdude May 31 '12 at 23:08

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