With Wiremock you can define a proxy so that if none of defined stub mappings match for a given request, Wiremock forwards that request to a given host:port. Is that behaviour available with Spring Cloud Contract DSL ?
I could not find anything of that feature in SCC documentation (with my browser find command).
That approach is not present via the dsl. You can create wiremock proxies and package them to a stub jar yourself. Then stub runner could pick those and start such a proxy.