davidparks21
I've set up a new (dev) OpenVPN on a linux server. I've configured it to push googles 8.8.8.8 DNS server to the clients.
I'm on a windows box. nslookup shows that it's using the 8.8.8.8 DNS server just fine.
When I do a packet capture I see that all traffic, including DNS is going through the VPN (I go to a random website to ensure DNS is called, also nslookup's don't show any traffic outside of the VPN).
There is a case, however, where DNS requests are going through my local DNS server, I think it's when a flash app comes up.
I'm racking my brain trying to figure out how or why there are any exceptions. Does anyone have a thought on what I might do to track down exactly what's happening here? How can I understand the routing logic going on behind the scenes for the odd case here?
Thoughts? Thank you!
David
krzee
Check if your local server is still in your resolv.conf
you may need to tweak the update-resolv-conf script to remove it, since it sounds like an app is not behaving as expected
<edit>
oops the client is windows...
Check if windows still knows about the local dns server, same thing different OS 😉
davidparks21
When I do an ipconfig /all command I see both adapters have a DNS server listed. Beyond this command I'm not familiar with how I might configure OpenVPN to disable all other DNS servers when it is enabled.
Thanks for the reply,
David
krzee
in unix i would know... for windows all i can think is that you could set your machine to always just use 8.8.8.8... unless you have a reason that is not ok
davidparks21
Ok, I'll continue to dig to see if I can do this automatically in windows. Is there some script that OpenVPN runs on connect that I can customize for this purpose?
Incidentally, I just started my test on windows, but I'll need to do the same on Linux/OSX, can you point in a direction on that?
Thanks!
Dave
krzee
in windows, it is done from within openvpn
in linux/unix you need the update-resolv-conf script, which can be edited if necessary
