Redirect external service to an internal service

HI, I want to know if it is possible to use Istio to redirect an external service definition to an Internal service.

This is for an application that tries to access itself using the public IP, but it does not have access to do that (there is a corp managed reverse proxy in front of it and requires an specific certificate), so I want to, when the app tries to access itself that istio redirects that access to the internal already defined service.