Example of the configuration:
set interfaces openvpn vtun10 encryption data-ciphers 'aes256' set interfaces openvpn vtun10 hash 'sha512' set interfaces openvpn vtun10 mode 'client' set interfaces openvpn vtun10 remote-host '203.0.113.1' set interfaces openvpn vtun10 tls ca-certificate 'ca' set interfaces openvpn vtun10 tls certificate 'client2' set pki ca ca certificate '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' set pki certificate client2 certificate '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' set pki certificate client2 private key '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'
Generated configuration:
vyos@r15:~$ cat /run/openvpn/vtun10.conf | grep TLS -A5 # TLS options ca /run/openvpn/vtun10_ca.pem cert /run/openvpn/vtun10_cert.pem key /run/openvpn/vtun10_cert.key dh none vyos@r15:~$ # List Item
Log:
Dec 03 11:43:42 r15 openvpn-vtun10[5406]: WARNING: Ignoring option 'dh' in tls-client mode, please only include this in your server configuration