The DICOM protocol typically works over a star-shaped network, where the central node (the PACS or VNA such as Orthanc) must know all the modalities it is connected to in order to be able to send them the medical images as a response to the DICOM C-MOVE command: https://book.orthanc-server.com/dicom-guide.html#dicom-network-protocol
This is a limitation of the DICOM protocol, not of Orthanc. If this is not acceptable to you, you can:
Thank you for your reply! We used DCM4CHEE as PACS software before. With DCM4CHEE, DICOM communication is possible if the PORT number is the same without specifying the client AE and IP address. If you have specific proposals for funding Orthanc, We a would like to help.
This means that you were indeed using DICOM C-GET.
I thank you much for your help regarding funding… I’m not in charge of this aspects of things, so please get in touch with Osimis using the “Orthanc Pro” form: https://www.orthanc-server.com/orthanc-pro.php