A short overview explaining PASV (including PASV response), EPSV, PORT, PBSZ, and REIN FTP commands.

The quote PASV command will respond with an IP/port in ellipsis. Use that data for the quote PORT <data> command. Your passive link is now established assuming that firewalls haven't …

Nov 9, 2009 · Active Mode—The client issues a PORT command to the server signaling that it will “actively” provide an IP and port number to open the Data Connection back to the client. …

May 18, 2011 · The real problem (yes, you can disregard all above as a major digression;-)) is that passive port range is in a non-privileged range. This means that your selected port …

Apr 1, 2012 · How use Passive-Mode in FtpWebRequest & fix PASV error in .Net 3.5 & Define port-range by codes

Jun 6, 2024 · The difference between active FTP and passive FTP modes lies in how connections are made. In active mode, the client initiates the connection with a PORT command, making …

Aug 22, 2014 · The standard PORT (active) and PASV (passive) commands in the FTP control protocol exchange address & port information as six 1-byte decimals, from which the other end …

In FTP's passive (PASV) mode, transfers and directory listings are performed on a separate network connection to the control connection, which is typically on port 21. Instead, the server …

Jul 3, 2021 · PASV FTP, or passive FTP, is an alternative mode for establishing File Transfer Protocol connections. It resolves an FTP client's firewall blocking incoming connections.

When using a restrictive local firewall that blocks even outgoing connections, you need to open not only control connection port 21, but also a port range for data connections. To open as …