[Podman] How to setup internal and external networking for rootless containers with podman

I am trying to setup networking in rootless containers. What I would like to have is both internal, i.e. container to container, and external, e.g. ping 8.8.8.8, inside a single container. I get internal working as well as external, however never both at the same time within a single container. I have raised this question on stackoverflow as well. The question on stackoverflow can be found at: https://stackoverflow.com/questions/69636101/how-to-setup-internal-and-exter... Regards, Gerben