Title: Self Diagnosis Windows ------- *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". - [Rename a network connection](http://windows.microsoft.com/en-au/windows-vista/rename-a-network-connection) ### 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](/page/help) and we'll do our best to help you. Please also send us your OpenVPN logs. GNU/Linux --------- ### 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 google.com Try to `ping 8.8.8.8`: if it works then your computer doesn't use the right DNS server. Add `nameserver 10.99.0.20` 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: 0.0.0.0/1 via 10.99.2.1 dev tun0 10.99.0.0/24 via 10.99.2.1 dev tun0 10.99.2.0/24 dev tun0 proto kernel scope link src 10.99.2.18 128.0.0.0/1 via 10.99.2.1 dev tun0 199.115.114.65 via 192.168.1.1 dev wlan0 These values might (and for some, will) change a little depending on your configuration (for example: wlan0 → eth0, 192.168.1.1 → 192.168.42.23, 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 https://paste.cubox.me 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](/chat) (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).