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Tor Network
Port 9001 is widely used as a default unencrypted relay port for the Tor anonymity network, facilitating encrypted internet traffic routing through volunteer-operated nodes. It enables data exchange between Tor relays, helping maintain user privacy and circumvent censorship..
Overview: Port 9001 serves as the default unencrypted relay port in the Tor (The Onion Router) network, allowing for data transmission between relays. This port is fundamental to the operation of the distributed Tor network, facilitating the forwarding of encapsulated traffic across multiple nodes to obscure the origin and destination of user data.
Transport Protocols: While Tor typically prefers TCP communication, port 9001 in this legacy example is not reserved explicitly for TCP or UDP. Tor primarily uses TCP for reliability, but relays may negotiate transports over other protocols depending on configuration. However, port 9001 itself is predominantly TCP-based for relay communication.
Role in Tor Operations: Relays communicate through port 9001 to maintain network consensus, exchange directory information, and transfer anonymous traffic. Non-exit relays rely on it to relay layers of encrypted data to the next node without decrypting payload content, supporting Tor's layered encryption model and anonymity design.