Show pagesourceBack to top Share via Share via... Twitter LinkedIn Telegram Yammer RedditRecent ChangesSend via e-MailPrintPermalink × 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 Last modified: 2023-06-05 07:33