Troubleshooting VPN connection on Linux

There are a number of factors that could contribute to why a VPN connection could not be established. This topic covers various troubleshooting steps to help resolve connectivity issues.

After each step, check if the issue still remains.

Here is what you should try at first: 

• Change the default protocol.

For the CyberGhost Linux CLI app, you will find 2 protocols available: OpenVPN and WireGuard. If you have experienced an unstable connection, switch to WireGuard and see if the problem persists:

• • OpenVPN  : cyberghostvpn --country-code US --openvpn --connect
  • Select WireGuard® as the connection protocol : cyberghostvpn --country-code US --wireguard --connect
  • TCP OpenVPN : cyberghostvpn --country-code US --tcp --connect
  • UDP OpenVPN : cyberghostvpn --country-code US --udp --connect

• Try different server locations.

Due to a series of factors, one location may offer a more stable connection than others.

• Reinstall the application:

Type the following command to remove the app:

sudo cyberghostvpn --uninstall

Reinstall the app following our tutorial here

• Remove potential safety Security or Parental controls from your router.

Certain ISPs usually equip their routers with parental/security controls enabled by default. Log in to your router, look for the "Security" tab and see if any security features or parental controls are turned on.

• Disable IPv6 support. Please find below our how-to guides:

From the Terminal

From Network Settings

• Reboot your router/modem.

If the connection remains unstable, try connecting using the manual connection option:

• How to Set Up OpenVPN on Linux Mint
• How to Set Up OpenVPN on Linux Ubuntu

For any additional information or concerns - it is best to approach the Support Department:

via e-mail: support@cyberghost.ro
via on-line request: https://support.cyberghostvpn.com/hc/en-us/requests/new
via 24/7 Live! Chat Sessions on our website