Linux – Resolv Conf Multiple DNS Servers with specific domains

domain-name-systemlinuxlinux-networkingopenvpnresolv.conf

I need the ability to have specific dns servers for multiple networks, and i would like to know how to properly update my /etc/resolv.conf:

lets say I have a major vpn, that I route all my trafiic and DNS queries through it.
But know I have another VPN that gives me specific accesss to a network, that VPN also as a DNS server, but it only serves a specific domain lets say: ´mydomain.local´

I have a constructed the following resolv.conf:

nameserver 10.8.0.1
search mydomain.local
nameserver 10.250.0.2

But the DNS queries will go on to the first domain server no matter what, changing order does not matter.

Can anyone give me any suggestion?

Best Answer

Impossible to achieve using /etc/resolv.conf only.

I'd say the easiest thing is to install dnsmasq (a caching DNS client), make it the sole resolver by putting nameserver 127.0.0.1 into /etc/resolv.conf and then modify dnsmasq configuration:

  • uncomment no-dhcp-interface= to disable dnsmasq's DHCP server facilities;
  • add a single generic record: server=10.8.0.1;
  • add specific record: server=/mydomain.local/10.250.0.2 to all requests for hosts in mydomail.local go to that server.
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