OpenVPN administration
Troubleshooting
failed to negotiate cipher
Error message(s):
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.
Resolution (for NetworkManager):
- add following to the VPN connection file (/etc/NetworkManager/system-connections/XXX.nmconnection)
data-ciphers=AES-256-CBC
- reload the connection
sudo nmcli connection reload