Cannot use openvpn connect on Nexus 7 (2013)

[skn]

I have set up the openvpn server on an Ubuntu machine and have been able to connect to it using my Mac (Tunnelblick) and the HTC One (M8). But I just can't get my Nexus 7 (2013) to use Connect.

The app imports the opvn profile properly but when I click on the "Connect" button after that _nothing_ happens. No error message, no connection and nothing in the log files even (other than the profile_import_success message).

Any idea what could be going wrong?

Env. details:
Nexus 7 (2013)
Android version:4.4.2
Build: KOT49H
Rooted: Yes

[skn]

No one has faced this/similar issue? At least if someone can tell me how to do any bit of debugging, I can try something at my end.

[gbguy71]

All I can do is tell you what I did. I had an older version of OpenVPN and upgraded to 2.3.4 for Windows. I run OpenVPN on my ASUS router (Merlin firmware). On my windows machine I generated all the server keys, certificates, etc. as well as the certificates, keys, for my client machines (a couple of windows laptops and my Nexus 7).

I copied four files for the Nexus to my Dropbox, so that I could access them from my Nexus:
1. Nexus-client.crt
2. Nexus-client.key
3. Nexus-client.ovpn
4. CA.crt [Root Certificate Authority certificate]

I then created a folder in my sdcard ( /sdcard/openvpn_config ) and exported the four files from my Dropbox into it.

I then opened my "OpenVPN Connect" app and did an Import Profile from SD card" and selected openvpn_config/Nexus-client.ovpn

Then I pressed on "Connect" and the connection was made.

That, literally, is all I know

Interestingly enough, I have NO idea how to tell if my VPN connection was really established.

[skn]

Finally figured out the issue. The immersive display setting tweak of Gravitybox Xposed module was interfering with the "Trust this application" dialog box.

Changing this setting made the dialog appear and the vpn to be established.