FTP Proxy - File Transfer Protocol Proxy
=========================================

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        **What is FTP Proxy?**

        An FTP Proxy is a server that acts as an intermediary between a client and an FTP server. It forwards FTP requests from clients to external or internal FTP servers, often applying rules, logging, or authentication in the process.

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        **Why is FTP Proxy useful?**

        * Adds security by controlling and filtering FTP traffic.
        * Enables auditing and logging of FTP sessions.
        * Helps enforce network policies (e.g., access control).
        * Allows FTP traffic through firewalls that may block direct FTP communication.
        * Supports NAT traversal in restrictive network environments.

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        **How it works?**

        * The client sends an FTP request to the FTP proxy instead of directly to the FTP server.
        * The proxy analyzes, logs, and forwards the request to the target FTP server.
        * The proxy can rewrite commands, inspect data, or enforce authentication.
        * Responses from the server pass back through the proxy to the client.

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        **Where is FTP Proxy used?**

        * In corporate or enterprise networks to monitor and control file transfers.
        * In firewall-protected environments to facilitate FTP communication.
        * In secure zones where FTP access must be strictly controlled.
        * In ISPs or security appliances offering managed FTP access.

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        **Which OSI layer does this protocol belong to?**

        * FTP Proxy operates at the **Application Layer (Layer 7)** of the OSI model.
        * It understands and processes FTP commands and responses.

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        **IS FTP Proxy windows specific?**

        * No, FTP proxy is not Windows-specific.
        * It can be implemented on any operating system with compatible proxy software (e.g., Blue Coat, WinGate, or Squid with FTP support).

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        **IS FTP Proxy Linux Specific?**

        * No, FTP proxy is not Linux-specific.
        * It is commonly deployed on Linux servers but also runs on Windows, BSD, and other platforms.

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        **Which Transport Protocol is used by FTP Proxy?**

        * FTP Proxy uses **TCP**, just like the FTP protocol it supports.
        * It relays control and data connections via TCP streams.

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        **Which Port is used by FTP Proxy?**

        * By default, it handles connections on:
          * **Port 21** for FTP control.
          * **Port 20** (or dynamic ports) for data transfer.
        * The proxy itself might be configured to listen on custom ports depending on network setup.

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        **Is FTP Proxy using Client server model?**

        * Yes, FTP Proxy uses the **client-server model**.
        * The proxy acts as a server to the client and as a client to the actual FTP server.
        * It intermediates all communication between the two.

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        Topics in this section,

                * :ref:`Learnings in this section <FTP_step1>`

                * :ref:`Terminology <FTP_step2>`

                * :ref:`Version Info <FTP_step3>`

                * :ref:`FTP Version&IEEE Details <FTP_step5>`

                * :ref:`FTP Basic Setup on Ubuntu using IPv4 <FTP_step18>`

                * :ref:`FTP Basic Setup on Ubuntu using IPv6 <FTP_step19>`

                * :ref:`FTP Protocol Packet Details <FTP_step6>`

                * :ref:`FTP Usecases <FTP_step7>`

                * :ref:`FTP Basic Features <FTP_step8>`
                    
                * :ref:`Reference links <FTP_step17>`


.. _FTP_step1:

.. tab-set::

    .. tab-item:: Learnings in this section

        * In this section, you are going to learn

.. _FTP_step2:

.. tab-set::

    .. tab-item:: Terminology
        
       * Terminology


.. _FTP_step3:

.. tab-set::

    .. tab-item:: Version Info
    
         * Version Info


.. _FTP_step5:

.. tab-set::

    .. tab-item:: FTP Version&RFC Details

        * rfc details

.. _FTP_step18:

.. tab-set::

    .. tab-item:: FTP Basic Setup on Ubuntu using IPv4

       * setup

.. _FTP_step19:

.. tab-set::
  
   .. tab-item:: FTP Basic Setup on Ubuntu using IPv6

     * setup
       
.. _FTP_step6:

.. tab-set::

    .. tab-item:: FTP Protocol Packet Details

        * packet details
       


.. _FTP_step7:

.. tab-set::

    .. tab-item:: FTP Usecases

       * usecases
        
        

.. _FTP_step8:

.. tab-set::

    .. tab-item:: FTP Basic Features
    
        * features 



.. _FTP_step17:

.. tab-set::

    .. tab-item:: Reference links
     
       * Reference links