Horos can request studies but can not download the images

Greetings,
I am helping to configure a orthanc server on a Ubuntu VPS.
AI did the configurations and validated the access to the studies using Microdicom on windows.

On mac, using Horos, it can query orthanc but can not download studies

E0123 16:14:49.592402 OrthancException.cpp:58] Error in the network protocol: DicomAssociation - connecting to AET "MacBook-A": Failed to establish association (0006:0317 Peer aborted Association (or never connected); 0006:031c TCP Initialization Error: Connection refused) E0123 16:14:49.594728 MoveScp.cpp:237] IMoveRequestHandler Failed: Error in the network protocol

DicomModalities:

"MacBook-A": [ "MacBook-A", "x.x.x.x", 11112 ],

Hope some one can point me to the right direction on getting it to work

Just figured it out what was wrong.
I have to permit internet → client connections.
Is there a way that the client pulls the study instead of the server pushing it to the client?

Hopefully, you can configure Horos to use C-GET to retrieve data instead of C-MOVE.

Success!
Thank you so much @alainmazy
It seems to be working now without the need of use PAT.