What kind of FTP did you say you used?

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Published 03 February 08 12:27 PM | Johan Hedberg

I'd just like to make a small note about protocol acronyms, and the importance of knowing the correct acronym when naming your BizTalk adapter so that someone planning to (re)use your adapter knows what it's really about. The case I'd like to highlight refers to FTP, and is something I've been forced to drill myself into when working in an environment where several different types of similar sounding acronyms are present.

FTP, the File Transfer Protocol, is used to transfer data from one system to another. The base implementation of this protocol sends all data (including username and password) in clear text through the wire. There are however protocol enhancements for securing this transfer using SSL. This is called FTP over SSL, which is more generally refered to as FTPS (or FTP/SSL). There is also the option of securing your FTP transfer by tunneling it though a SSH session. Though since FTP is a multi channel protocol this in many implementations just protects the control channel (ie the username and password) and sends the data unprotected. However this differs from implementation to implementation, and in some cases both control codes and data is protected. This is refered to as Secure FTP, but is not to be confused with SFTP, which is used when talking about the SSH File Transfer Protocol, which has really nothing to do with FTP. Confusing isn't it? ;)

Wikipedia har more info. FTP (and FTP over SSH), FTPS, SFTP.

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# Be Logical - writings by Johan Hedberg said on March 2, 2008 08:32 PM:

A while ago I wrote about different kinds of file transfer protocols that contained the acronym FTP in

# An application platform perpective... said on March 10, 2008 02:00 PM:

Mikael Håkansson har publicerat den SFTP adapter som han var med och utvecklade inom ramen för

# Noticias externas said on March 10, 2008 02:49 PM:

Mikael Håkansson har publicerat den SFTP adapter som han var med och utvecklade inom ramen för

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