Portal link for S/4 HANA on premise system

Hi,

Is there a  Portal Link for S/4 HANA on premise system?

We have a  S/4 HANA on premise system ..

I saw some Study material, where there are some Exercises  for Posting the  Account Document in Portal.

So need the Portal link S/4 HANA on premise system , which looks similar to the Flori screen.

Please let me know on how to get the portal link.

Thanks.

Shreedhar Gangadhar