Port 9051 (TCP) for Tor Control, detailed network port information database | WhatPortIs - Network Port Database
Back to Home

Port 9051

Tor Control

**Tor (The Onion Router)** is a volunteer-operated overlay network designed to enable anonymous communication over the Internet. It routes traffic through multiple relays to obscure the user's location and usage from surveillance or network traffic analysis, promoting privacy and free access. Port `9051` is primarily used as the **Control Port** for interacting programmatically with the Tor daemon, allowing software to script or query Tor's status..

TCPUnofficialInsecure
Protocol
TCP
Category
Status
Unofficial
Common Usage
Anonymity Network

Technical Details

Overview:

Tor is both a network and a set of technologies facilitating anonymous communication on the Internet. It routes Internet traffic through a worldwide, volunteer overlay consisting of thousands of relays.

Port 9051 Purpose:

Port 9051 is the default Control Port of a Tor instance. Unlike the SOCKS proxy port (commonly 9050), the Control Port allows external applications to communicate with Tor via the Tor Control Protocol. This protocol enables authenticated clients to:

  • Manage and configure Tor on the fly
  • Query status and network information
  • Gracefully shut down or restart Tor
  • Create ephemeral hidden services on demand

Protocols and Characteristics:

  • The Control Port runs over TCP and supports either plaintext connections (optionally with hashed password authentication) or, increasingly, UNIX domain sockets for local secured access.
  • Because Tor does not natively employ SCTP, port 9051 only supports TCP.
  • Authentication can be via cookie or password and is essential to prevent unauthorized Tor manipulation.
Advertisement
Advertisement
Related Ports
Related ports feature coming soon!