So I'm working an on a new project that consuming Web Services (WSDL) through a Gateways Service. I need to provide username & password PLUS a Client Certificate X.509 as they are enforcing Mutual TLS connection.
However, I have found plenty of examples in creating a self-assigned certificate but the Gateway Service provider requires that the Client Certificate need to be issued via a 3rd Party Trusted Certificate Authority. Which CA providers will issue an x.509 Client Certificate?
Historically I've used LetsEncrypt, but they don't offer this kind of service.
What do I need to google for?