The standard ports are 6881-6889 TCP, but the protocol can be run on any port, and the peer-to-peer nature of the protocol means that discovering peers that use unblocked ports is simple.
The operations of DSM services require specific ports to be opened to ensure normal functionality. In this article, you can find the network ports and protocols required by DSM services for operations. Certain packages may have been discontinued in newer
Have you ever wondered what network ports your Synology NAS uses for all the services it offers? Below I invite you to discover all the ports used by your device for the various services it provides.