If you have multiple network adapters in your machine, you may want to limit which one your FTP server listens on. We create it and tell it to listen on port 21 for any IPAddress on the server. TcpClient client = _listener.EndAcceptTcpClient(result) Private void HandleAcceptTcpClient(IAsyncResult result) _listener.BeginAcceptTcpClient(HandleAcceptTcpClient, _listener) _listener = new TcpListener(IPAddress.Any, 21) The first step in building our FTP server is getting our server to listen for connections from a client. To another thread to handle the processing of commands. Once we can accept connections, we will learn to pass off those connections We will start by creating a server that can listen for connections from a client. Typically, a client connects to a server on port 21, sends some login information,Īnd gets access to the server's local filesystem.

to transfer data reliably and efficiently.įTP is a way to transfer files from one computer to another.to shield a user from variations in file storage systems among hosts, and.to encourage indirect or implicit (via programs) use of remote computers.to promote sharing of files (computer programs and/or data).What is FTP?Īccording to the specification in IETF RFC 959, the File Transfer With that out of the way, let's get started. It is not secure, and I have done no scalability testing on it. It is an introduction into creatingĪn application from a specification, an introduction to socket communication, asynchronous methods, stream encodings, and basic encryption. It is not an example of a full featured, scalable, and secure FTP server. First, I want to describe what this article is not.

Create filezilla ftp server