STARTTLS Cannot be enforced. It will be used automatically if the eğilimli server supports it. The encryption type should be set to ‘None/STARTTLS’ in this case. See here for an example on how to configure self signed certificates. The native SAML integration negates the need for external software like Apache https://vuf.minagricultura.gov.co/Lists/Informacin%20Servicios%20Web/DispForm.aspx?ID=11516095