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I got the error "ECONNABORTED - Connection aborted" while trying to access the FileZilla server using c# code.
Here is the c# code I use: This is the C# Error message I got: And here is FileZilla's log:

I think you might be "missing a piece" here.

I believe you have an issue between FTPS over SSH versus plain FTPS. To do things via SSH/FTPS you need an SSH layer in there. The implementations of "FtpClient" I find in a quick search come back to FluentFTP for C# which does not seem to have SSH capabilities.

Try to switch the port you're using to port 21 and see if it works via your current implementation.

[old but potentially relevant]
https://stackoverflow.com/questions/341 ... th-c-sharp

Plus, FileZilla Pro Enterprise Server has its own forum and is not supported here. Please use the customer forum for Pro products. Closing.