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IBM Sametime P2P
IBM Sametime Peer-to-Peer (P2P) file transfer typically utilizes port 5656 to facilitate direct exchange of files between clients within a corporate environment. This port supports real-time collaboration by allowing users to quickly share documents or data without routing through a central server, enhancing workflow efficiency..
IBM Sametime is an enterprise instant messaging platform that includes capabilities such as presence awareness, chat, voice and video conferencing, and file transfer. The P2P file transfer component on port 5656 allows clients to establish direct TCP connections, enabling quick and efficient sharing of files without significantly burdening the Sametime server.
When a user initiates a file transfer, a session is negotiated through Sametime’s signaling, after which the clients communicate peer-to-peer over this port. This method enhances transfer speeds and reduces server load but requires that network configurations such as firewalls and NAT traversal support direct client connections.
Port 5656 is typically unofficial and usage is within internal corporate networks. Because it’s a direct transfer channel, network administrators need to be aware of the associated data flows, particularly as they can bypass centralized monitoring systems if improperly configured.