{{tag>vpn openvpn troubleshooting windows11}}

====== VPN troubleshooting ======
===== OPTIONS ERROR: failed to negotiate cipher with server.  Add the server's cipher ('AES-256-CBC') to --data-ciphers (currently 'AES-256-GCM:AES-128-GCM:CHACHA20-POLY1305') if you want to connect to this server. =====

Happens on Windows 11. In the client file change the line

  ciphers AES-256-CBC

to
  data-ciphers AES-256-CBC



====== See also ======
  * [[wiki:networkmanager_can_connect_openvpn|NetworkManager can't connect to openvpn]]
  * [[wiki:openvpn_installation|Openvpn installation]]

====== References ======