SQL Server Filestream - Remote Connection C#

Question

Is there some way to use SqlFileStream in a remote connection (out of network, using external ip)?

I know that for use the filestream, i need use Integrated Security = true. I tried following this article:

https://www.sqlskills.com/blogs/bobb/using-filestream-streaming-io-and-sql-logins-with-impersonation/

But it didnt work for me... Local (using integrated security), all works fine. But when i try use external ip, i get "Path not found" in SqlFileStream.

I saw this too: Filestream using SQL Server authentication

But i got the same result.