This is most likely a duplicate, but I can't find the correct solution for my problem

I set up a OpenVPN server on our NAS and added push "dhcp-option DNS" (this is a random ip, I set it up with our correct DNS).

Now all the mac clients using tunnelblick can connect to it and also ping the NAS by it's hostname. Without the option that wasn't possible and I had to ping the NAS via IP.

I hoped that would be the same on windows, but it's not.

What do I have to do to make windows resolve hostnames? I tried to change the adapter settings, but that didn't do the trick. Also adding dhcp-option DNS to the client config didn't work ether.

So how can I set up the windows client to resolve hostnames instead of IP adresses?

These are the settings in the client config:

dev tun
proto udp
resolv-retry infinite
key-direction 1
redirect-gateway def1
script-security 2
reneg-sec 0
cipher AES-256-CBC
auth SHA512

And also dev tap isn't an option here.

  • Does represent a Windows DNS server, or a Linux bind host? Is there a firewall between your OpenVPN/NAS server, and
    – leeharvey1
    Oct 3 '21 at 17:08
  • @leeharvey1 I use the DNS from our router. For mac clients it's working. The only firewall that' in between is the windows firewall itself and the firewall of our router on which the DNS is running on.
    – skarpeta
    Oct 5 '21 at 8:26

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