2021-01-19 12:01:58 OPTIONS ERROR: failed to negotiate cipher with server.  Add the server's cipher ('BF-CBC') to --data-ciphers (currently 'AES-256-GCM:AES-128-GCM') if you want to connect to this server.
2021-01-19 12:01:58 ERROR: Failed to apply push options
2021-01-19 12:01:58 Failed to open tun/tap interface

解决办法:在配置文件中增加一行

ncp-ciphers "BF-CBC"

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