client
proto tcp-client
remote services.unite.uni-sofia.bg
port 443
dev tun
dev-type tun
verb 3
auth SHA512
cipher AES-256-GCM
remote-cert-tls server
tls-version-min 1.2
tls-version-max 1.2
pkcs12 /path/to/your/pkcs12_file.p12

<ca>
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
</ca>