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Self Diagnosis


Before anything, make sure you have started OpenVPN as Administrator and that your config files exist in C:\Program Files\OpenVPN\config\.

netsh.exe error

If you find lines like those in your OpenVPN log:

NETSH: C:\Windows\system32\netsh.exe interface ipv6 set address Local Area Network
ERROR: netsh command failed: returned error code 1

This error is really frequent on Windows and seem to happen because of a OpenVPN problem with netsh.exe and IPv6.
To fix it, rename your network connection to avoid spaces, for example "Local Area Network" to "lan".

Multiple TAP-Windows adapters

Error: When using --tun-ipv6, if you have more than one TAP-Windows adapter, you must also specify --dev-node
Exiting due to fatal error

That one can happen when you have multiple TAP-Windows adapters, most of the time because of another software using TAP.

To fix it, open a command prompt (Shift+Right click) in your OpenVPN directory (where openvpn.exe is), and run:

openvpn.exe --show-adapters

This will list your TAP adapters.
Then, open your ccrypto.ovpn configuration file with notepad and add this on a new line:

dev-node [name]

Replace [name] by your TAP adapter name.

Still doesn't work

If you still cannot use the VPN, please go to the Support page and we'll do our best to help you.
Please also send us your OpenVPN logs.


I have a ".ovpn" file but I need a ".conf"!

You just have to change the extension by renamming the file.
.conf is more commonly used on GNU/Linux, but it's the same as the .ovpn file.

I'm unable to use your VPN with Network-Manager.

First, check that you have properly created the profile (tutorial to come).
If it's the case, before anything else, let's make sure that OpenVPN itself is working with the following command:
sudo openvpn --config ccrypto.conf
(make sure to replace "ccrypto.conf" by the actual name of your configuration file)

I'm connected but cannot ping

Try to ping if it works then your computer doesn't use the right DNS server. Add nameserver at the beginning of /etc/resolv.conf once the connection is made. Else, continue reading.

It still doesn't work!

Using the ip route command, make sure you have, alongside with other lines, the following: via dev tun0 via dev tun0 dev tun0  proto kernel  scope link  src via dev tun0 via dev wlan0

These values might (and for some, will) change a little depending on your configuration (for example: wlan0 → eth0, →, etc.).
If you don't have every one of these lines, kill OpenVPN and fire it again or add the routes by hand using ip route add. If you don't know how to do it, it would be best to come ask on IRC (we will need the output of both ip addr and ip route, please paste them into and just give us the link to the paste).

I've tried everything but nothing seems to work! T_T

Ok… I guess now you can come ask us on IRC (but remember to stay a while, we're not payed professionnal, we might not be around at a given time but we will answer later on).