This is configuration of the config file from Amahi wiki:
remote XYZ.yourhda.com 1194
client
dev tun
proto udp
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca-cert.crt
cert AmahiHDAClient.crt
key AmahiHDAClient.key
comp-lzo
verb 3
auth-user-pass
Here are the options given in the NM OpenVPN client plugin:

