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Fix OpenVPN Cipher Errors - Kali Linux

How to Fix TryHackMe OpenVPN Connection “data-ciphers” or “depreciated cipher” Error on Kali Linux


Why this error cause:

  • OpenVPN’s updated client is now incompatible with the configuration files generated by TryHackMe VPN servers.


Affected Versions:

  • OpenVPN 2.6 (Only)


How to fix?

  • Update & upgrade your Kali Linux.
sudo apt update && sudo apt upgrade -y


  • Update your .ovpn config file by replacing data-ciphers AES-256-CBC with cipher AES-256-CBC.
  • Now try to connect with the TryHackMe server again and you see that you successfully connected.
  • Check with ifconfig to get the VPN tunnel Ip.
  • - If it's not work, then change the server and try again now it’s work.
  • Also, remember that some countries block VPNs if your country blocks VPN then use AttackBox.
  • In your case if your country does not block VPNs but you get same error then last option is try running TryHackMe OpenVPN-Troubleshooting Script.


Thanks for Reading.