83

I'm using OpenVPN through Tunnelblick on MacOS X Lion.

I need to set specific DNS (with local IP, which works only when VPN is up) for the duration of this VPN session only.

I do not have access to the OpenVPN server configuration. Only client config. Also, DNS from the server doesn't work.

So it works like this: I connect to VPN, go the Network preferences and manually set DNS. After VPN is disconnected, I switch back to default. It works, but it needs to be automatic.

After some exploration I found that OpenVPN up- and down- scripts might help me with that. Unfortunately, I haven't found any specific documentation about how exactly it can be done.

How it can or can't be done? Any advice would be appreciated!

Alicja Kario
  • 6,449
Stanislav Shabalin
  • 933

3 Answers3

90

try adding:

# put actual dns name here
dhcp-option DNS 10.11.12.13

to your client's config

pQd
  • 30,537
19

If you (unlike the OP) have access to the OpenVPN server configuration, you can add this option in your OpenVPN server.conf if you want to push for all the clients:

push "dhcp-option DNS 8.8.8.8"

You can change the 8.8.8.8 to your desired DNS.

Per Lundberg
  • 177
arbabnazar
  • 579
6

add this to client config file:

#ipv4
pull-filter ignore "dhcp-option DNS"
#ipv6
pull-filter ignore "dhcp-option DNS6"
cym
  • 61