In Passive mode the server behaves a bit differently. At this point the server sends an outbound connection conformation on port 20 which the client sees then they start communicating using various ports negotiated between them, moving files back and fourth. In active mode the client connects to the server using port 21. I'm not going to get into the technical details which can get really confusing, but this is basically what's happening. The difference between Active and Passive is how the server communicates with the client. Once connected you just drag files into or out of the Explorer window to your computer. Just put ftp:// followed by the server address in the address line. Windows Explorer can be used as an FTP client. If Passive mode is off, then you are using Active mode but they don't generally explain that clearly. You will usually see an option in your FTP client for Passive. There are two connection modes to operate an FTP server. Nice screens, easy to setup, clear and concise wizards. Pablos FTP server A free version is available, full version costs $12.50 His new version looks great. I continue to use BulletProof on my home machine because it is somewhat more powerful and has a number of special security configurations which I need for a server that is open to the world. I have found it very good and reasonably secure, and best of all it's FREE. On other machines I now use a free open source server called FileZilla Server. In the past I have used the following free programs and find them quite nice. Once you understand the system a bit better, and if you have the need then advance into a more secure and sophisticated server. If you are just getting started, I would recommend you get a free server and play with it. Other pay FTP servers can cost anywhere from just a few dollars to many thousands depending on the intended use. On my primary home server I use a program called BulletProof FTP Server which costs $40 but is very powerful and quite secure. Most of the free versions tend to be a bit lacking in security controls but they do work. There are many free FTP servers available for download from various shareware software sites. I find it much easer to get a third party FTP server program than to try and use the one included with Windows, unless you already understand all this stuff about usernames, passwords and shares. Windows XP Home does not have an FTP server built-in. They use the Windows users system to manage who can connect. Windows 2000, and XP Professional both have built-in FTP servers but they are rather complicated to set up. To run an FTP server, you have to have FTP server software.
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