DNS Push from OpenVPN

If you’ve set up an OpenVPN server for multiple OS tennants, you might have noticed that your OSX clients connect and receive their DNS setting from the server just fine. Your Linux clients however, if running resolvconf or openresolv may not work as easily. Luckily there is a simple and easy fix.

The Fix

In the clients OpenVPN config file add the following…

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script-security 2
up /etc/openvpn/update-resolv-conf
down /etc/openvpn/update-resolv-conf

You can also add this on the server side configuration in the Custom Directives section.

Note however tho that if you put this on the server side, all of your clients will get this change and the file that we are referencing above may not exist on their machines which will cause problems.