NetworkManager is not changing /etc/resolv.conf after openvpn dns push

Solution 1:

This works for me: http://www.softwarepassion.com/solving-dns-problems-with-openvpn-on-ubuntu-box/

The important step is adding following two lines of configuration into your client openvpn config file:

up /etc/openvpn/update-resolv-conf
down /etc/openvpn/update-resolv-conf

Also ensure the resolvconf package is installed on the client, because that update-resolv-conf script depends on it.

It works with openvpn client service or command to start it manually.

However, the Ubuntu Network Manager doesn't this. It's an issue so far: https://bugs.launchpad.net/ubuntu/+source/openvpn/+bug/1211110

Solution 2:

Works for me after disabling NetworkManager's own dnsmasq.

Edit /etc/NetworkManager/NetworkManager.conf

 #dns=dnsmasq

and restart NetworkManager

sudo restart network-manager

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Solution 3:

Finally works (with standard NetworkManager and OVPN plugin)

nmcli -p connection modify MY_VPN_CONNECTION ipv4.never-default no
nmcli -p connection modify MY_VPN_CONNECTION ipv4.ignore-auto-dns no
nmcli -p connection modify MY_VPN_CONNECTION ipv4.dns-priority -42

In this case once VPN connection is established, all DNS requests are directed to VPN-supplied DNS servers without any manipulations with dnsmasq, up/down/dispatch helper scripts.