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I'm looking for information on what the most common FTP server software is. This information is readily available for web server software, but I can't find the equivalent for FTP server software. Is this information available anywhere?

The goal of this is for an FTP client being created. Clients have different options available and different responses to errors, so having a list of servers that could be tested against would be helpful. Straight implementation of the FTP spec seems to be only partway to what we need. Knowing common servers to test against would be helpful to make sure all cases are handled correctly.

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closed as not constructive by Dave M, MDMarra, Greg Askew, mgorven, Iain Aug 8 '12 at 21:03

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

I can't imagine that this would be very accurate since you can't always just access any ftp server. Also a lot of FTP servers in a corporate environment are only available from a LAN or VPN network. – Lucas Kauffman Jul 23 '12 at 19:13
What is the purpose of gathering this information? If you added that to your question, it would most likely make it easier to get you the information you're after. – nojak Jul 23 '12 at 19:37
@LucasKauffman This is definitely something I'd considered. This confound I'm not worried about for my case though since most of my users will not be in this group of people. They will be uploading, most of the time, to web servers/hosts that have ftp enabled. – Ktash Jul 24 '12 at 0:15

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