I'm trying to configure my client to use only username/password for authentication. Unfortunatly, iOS app keeps asking me for a Certificate (I'm not sure it's Client certificate though).
Here is client.config:
client
dev tun
proto tcp
remote ...
resolv-retry infinite
nobind
persist-tun
ca ca.crt
ns-cert-type server
auth-user-pass
auth-retry interact
Here is how it looks on iOS (notice the second field asking a certificate):